[Event "Warsaw YMCA Winter-A 296th"]
[Site "Warsaw"]
[Date "2025.03.21"]
[Round "11"]
[White "Szwaj, Jacek"]
[Black "Mazurek, Jerzy"]
[Result "1/2-1/2"]
[ECO "B47"]
[WhiteElo "1940"]
[BlackElo "1895"]
[PlyCount "105"]
[EventDate "2025.01.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "CB14_2025"]
[SourceDate "2024.11.01"]
[SourceVersion "1"]
[SourceVersionDate "2024.11.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e6 5. Nc3 Qc7 6. Qd3 Nf6 7. Ndb5 Qb8 8. Qg3 d6 9. Be3 a6 10. Nd4 h5 11. f3 Bd7 12. Be2 b5 13. Nxc6 Bxc6 14. 0-0 Qb7 15. Rfd1 Be7 16. Bd3 h4 17. Qf2 b4 18. Ne2 e5 19. c4 Nd7 20. b3 a5 21. Bc2 g6 22. h3 Kf8 23. Qe1 Kg7 24. Qd2 Nf8 25. Nc1 Ne6 26. Nd3 Bd8 27. Nf2 Bc7 28. Ng4 f6 29. Kh1 Rad8 30. Bf2 Bb6 31. a3 Bd4 32. Bxd4 Nxd4 33. axb4 axb4 34. Ra2 Ra8 35. Rda1 Rxa2 36. Rxa2 Ra8 37. Qh6+ Kf7 38. Rxa8 Qxa8 39. Bd1 Qa1 40. Nf2 g5 41. Qh7+ Ke6 42. Kh2 Qc1 43. g3 hxg3+ 44. Kxg3 Qf4+ 45. Kg2 Be8 46. Qg8+ Ke7 47. Qd5 Bh5 48. Qb7+ Ke6 49. Qc8+ Ke7 50. Qb7+ Ke6 51. Qd5+ Ke7 52. Qb7+ Ke6 53. Qd5+ 1/2-1/2

[Event "Warsaw YMCA Winter-A 296th"]
[Site "Warsaw"]
[Date "2025.03.12"]
[Round "10"]
[White "Mazurek, Jerzy"]
[Black "Choroszej, Aleksander"]
[Result "1/2-1/2"]
[ECO "B06"]
[WhiteElo "1895"]
[BlackElo "1999"]
[PlyCount "95"]
[EventDate "2025.01.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "CB14_2025"]
[SourceDate "2024.11.01"]
[SourceVersion "1"]
[SourceVersionDate "2024.11.01"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. Be3 a6 5. Qd2 b5 6. h4 h6 7. 0-0-0 Nd7 8. f3 Bb7 9. Nh3 Rc8 10. g4 e6 11. g5 h5 12. d5 exd5 13. Nxd5 Ne7 14. Nhf4 0-0 15. Bh3 Bxd5 16. Nxd5 Nxd5 17. Qxd5 Rb8 18. f4 Kh7 19. e5 Nb6 20. Bxb6 Rxb6 21. Rhf1 Qe7 22. e6 fxe6 23. Bxe6 Kh8 24. f5 gxf5 25. Rxf5 Rbb8 26. Bf7 Be5 27. Qf3 Kg7 28. Rf1 Rh8 29. Bxh5 Rbf8 30. Rxf8 Rxf8 31. Qxf8+ Qxf8 32. Rxf8 Kxf8 33. Be2 Bg3 34. g6 Bxh4 35. c3 Kg7 36. Bd3 a5 37. a3 c5 38. Be4 b4 39. cxb4 cxb4 40. a4 b3 41. Kd2 Bf6 42. Kd3 Bxb2 43. Kc4 Ba3 44. Kxb3 Bb4 45. Kc4 Kf6 46. Kd5 Kg7 47. Ke6 Bc5 48. Bd3 1/2-1/2

[Event "Warsaw YMCA Winter-A 296th"]
[Site "Warsaw"]
[Date "2025.02.28"]
[Round "8"]
[White "Mazurek, Jerzy"]
[Black "Celinski, Kamil"]
[Result "1/2-1/2"]
[ECO "B92"]
[WhiteElo "1895"]
[BlackElo "1974"]
[PlyCount "101"]
[EventDate "2025.01.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "CB14_2025"]
[SourceDate "2024.11.01"]
[SourceVersion "1"]
[SourceVersionDate "2024.11.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be6 8. Be3 Be7 9. Nd5 Bxd5 10. exd5 Nbd7 11. Qd2 Qc7 12. c4 a5 13. Qd3 a4 14. Nd2 Nc5 15. Qc2 0-0 16. 0-0 Nfd7 17. f4 exf4 18. Bxf4 Bf6 19. Rab1 Rfe8 20. Nf3 h6 21. b4 axb3 22. axb3 Ne4 23. Bd3 Ndc5 24. Rbe1 Nxd3 25. Qxd3 Nc5 26. Qc2 Qb6 27. Kh1 Rxe1 28. Rxe1 Rd8 29. Nd2 Na6 30. Qf5 Qf2 31. Rf1 Qe2 32. Bxh6 Rf8 33. Ne4 Be5 34. Ng5 Qxf1+ 35. Qxf1 gxh6 36. Ne4 f5 37. Nd2 Nc5 38. Qe2 Ra8 39. g3 Ra1+ 40. Kg2 Ra2 41. Kh3 Ne4 42. Qh5 Ng5+ 43. Kh4 Rxd2 44. Qg6+ Bg7 45. Qxf5 Rxh2+ 46. Kg4 Re2 47. Qc8+ Kh7 48. Qf5+ Kg8 49. Qc8+ Kh7 50. Qf5+ Kg8 51. Qc8+ 1/2-1/2

[Event "Warsaw YMCA Winter-A 296th"]
[Site "Warsaw"]
[Date "2025.02.21"]
[Round "7"]
[White "Bobinski, Lukasz"]
[Black "Mazurek, Jerzy"]
[Result "1-0"]
[ECO "C77"]
[WhiteElo "1841"]
[BlackElo "1895"]
[PlyCount "69"]
[EventDate "2025.01.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "CB14_2025"]
[SourceDate "2024.11.01"]
[SourceVersion "1"]
[SourceVersionDate "2024.11.01"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d4 b5 6. Bb3 Nxe4 7. Nxe5 Nxe5 8. dxe5 Bb7 9. Qh5 Qe7 10. 0-0 g6 11. Qg4 Bg7 12. Re1 h5 13. Qf3 Nc5 14. Bd5 c6 15. Bg5 Qxg5 16. Qxf7+ Kd8 17. Qxg7 Kc7 18. Bf7 Qe7 19. Qf6 Qxf6 20. exf6 Raf8 21. Re7 g5 22. Nd2 Rh6 23. b4 Rxf6 24. Bxh5 Ne6 25. Ne4 Rh6 26. Rd1 Bc8 27. Bg4 Kd8 28. Rxe6 Rxe6 29. Bxe6 d5 30. Bxc8 Kxc8 31. Nxg5 Rf4 32. c3 Rc4 33. Rd3 d4 34. Ne4 dxc3 35. Nd6+ 1-0

[Event "Warsaw YMCA Winter-A 296th"]
[Site "Warsaw"]
[Date "2025.02.13"]
[Round "6"]
[White "Mazurek, Jerzy"]
[Black "Lewandrowski, Tomasz"]
[Result "0-1"]
[ECO "B32"]
[WhiteElo "1895"]
[BlackElo "1999"]
[PlyCount "172"]
[EventDate "2025.01.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "CB14_2025"]
[SourceDate "2024.11.01"]
[SourceVersion "1"]
[SourceVersionDate "2024.11.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nb5 d6 6. Nd2 a6 7. Nc3 Nf6 8. Nc4 b5 9. Ne3 Be7 10. Bd3 Nb4 11. Be2 0-0 12. a3 Nc6 13. 0-0 Be6 14. Ned5 Nd4 15. Nxe7+ Qxe7 16. Bd3 h6 17. Ne2 Nxe2+ 18. Qxe2 d5 19. exd5 Bxd5 20. Bd2 Rfe8 21. Qe3 Bb7 22. Rfe1 Qc7 23. Qg3 Kh8 24. Rad1 Qc6 25. Bc3 Nh5 26. Qg4 Nf6 27. Qg3 e4 28. Be2 Re6 29. f3 Qc5+ 30. Bd4 Qxc2 31. fxe4 Bxe4 32. Bf3 Bxf3 33. Qxf3 Rae8 34. Rf1 Kg8 35. h3 Qg6 36. Bxf6 Rxf6 37. Qd3 Rxf1+ 38. Kxf1 Qf6+ 39. Qf3 Qxb2 40. Kg1 Qe5 41. Rd7 Qe3+ 42. Qf2 Qe6 43. Rb7 Qe1+ 44. Qf1 Qxf1+ 45. Kxf1 Re3 46. a4 bxa4 47. Rb4 Ra3 48. Rb6 Ra1+ 49. Kf2 a3 50. Rxa6 g6 51. Kg3 Kg7 52. Kh2 h5 53. Kg3 Kh6 54. h4 Kg7 55. Kh2 Kf8 56. Ra7 Kg7 57. Ra6 Kh6 58. Kg3 f5 59. Ra7 a2 60. Kh2 f4 61. Ra8 Kg7 62. Ra4 Kg8 63. Ra3 Kf7 64. Ra6 Ke7 65. Ra5 Ke6 66. Ra4 Kf5 67. Ra5+ Kg4 68. Ra4 Kf5 69. Ra6 Ke4 70. Ra3 Kf5 71. Ra6 Kg4 72. Rxg6+ Kxh4 73. Ra6 Kg4 74. Ra4 Kf5 75. Ra3 Ke4 76. Ra4+ Ke3 77. Ra3+ Ke2 78. Ra4 h4 79. Ra3 h3 80. gxh3 f3 81. Ra8 f2 82. Re8+ Kd3 83. Rd8+ Ke4 84. Re8+ Kd5 85. Rd8+ Ke6 86. Re8+ Kd7 0-1

[Event "Warsaw YMCA Winter-A 296th"]
[Site "Warsaw"]
[Date "2025.02.12"]
[Round "9"]
[White "Urych, Krzysztof"]
[Black "Mazurek, Jerzy"]
[Result "0-1"]
[ECO "C50"]
[WhiteElo "1937"]
[BlackElo "1895"]
[PlyCount "52"]
[EventDate "2025.01.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "CB14_2025"]
[SourceDate "2024.11.01"]
[SourceVersion "1"]
[SourceVersionDate "2024.11.01"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 Nf6 5. Nc3 a6 6. Be3 Bxe3 7. fxe3 d6 8. Ng5 0-0 9. 0-0 Bg4 10. Nxf7 Rxf7 11. Bxf7+ Kf8 12. Qe1 Kxf7 13. Qh4 Be6 14. Nd5 Bxd5 15. exd5 Ne7 16. Rxf6+ gxf6 17. Qxh7+ Kf8 18. Qh6+ Kf7 19. Qh7+ Kf8 20. Rf1 Ng8 21. Rf3 Qe7 22. Qf5 Rd8 23. e4 Rd7 24. Rg3 Qh7 25. Qe6 Qf7 26. Rxg8+ Kxg8 0-1

[Event "Warsaw YMCA Winter-A 296th"]
[Site "Warsaw"]
[Date "2025.02.07"]
[Round "5"]
[White "Mazurek, Jerzy"]
[Black "Flis, Piotr"]
[Result "1/2-1/2"]
[ECO "C41"]
[WhiteElo "1895"]
[BlackElo "2022"]
[PlyCount "111"]
[EventDate "2025.01.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "CB14_2025"]
[SourceDate "2024.11.01"]
[SourceVersion "1"]
[SourceVersionDate "2024.11.01"]
[SourceQuality "1"]

1. d4 d6 2. e4 Nf6 3. Nc3 e5 4. Nf3 exd4 5. Nxd4 Be7 6. Be2 0-0 7. 0-0 Re8 8. Re1 c5 9. Nf5 Bxf5 10. exf5 Nc6 11. Bf3 Qd7 12. Nd5 Nxd5 13. Qxd5 Nb4 14. Qxb7 Qxb7 15. Bxb7 Rab8 16. Be4 Bf6 17. Bf4 Bxb2 18. Rab1 Bc3 19. Re2 Nxa2 20. Rxb8 Rxb8 21. g4 Be5 22. Bd2 Kf8 23. Re1 Bc3 24. Bf4 Rb6 25. Re3 Bd4 26. Ra3 Nc3 27. Bd3 c4 28. Bxc4 d5 29. Bd3 Rb1+ 30. Kg2 Ke7 31. Be3 Bxe3 32. fxe3 Nd1 33. Rxa7+ Kf6 34. Kf3 Nc3 35. Kg2 Re1 36. Kf2 Rh1 37. Kg2 Re1 38. h4 h6 39. Kf2 Rh1 40. g5+ hxg5 41. hxg5+ Kxg5 42. Rxf7 Ne4+ 43. Bxe4 dxe4 44. Rxg7+ Kxf5 45. Rc7 Kg4 46. Kg2 Rc1 47. Rc4 Kf5 48. Kg3 Rf1 49. Rc5+ Ke6 50. Kg4 Rf3 51. Rc3 Kd5 52. Ra3 Kc4 53. Ra4+ Kd5 54. Ra3 Kc4 55. Ra4+ Kd5 56. Ra3 1/2-1/2

[Event "Warsaw YMCA Winter-A 296th"]
[Site "Warsaw"]
[Date "2025.01.31"]
[Round "4"]
[White "Rozycki, Bartlomiej"]
[Black "Mazurek, Jerzy"]
[Result "1/2-1/2"]
[ECO "C45"]
[WhiteElo "2099"]
[BlackElo "1895"]
[PlyCount "125"]
[EventDate "2025.01.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "CB14_2025"]
[SourceDate "2024.11.01"]
[SourceVersion "1"]
[SourceVersionDate "2024.11.01"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. Nxc6 bxc6 6. Bd3 d5 7. exd5 cxd5 8. 0-0 Be7 9. c4 d4 10. Nd2 0-0 11. Ne4 Bb7 12. Nxf6+ Bxf6 13. b4 g6 14. Bf4 c5 15. b5 Qd7 16. a4 Rfe8 17. Re1 Rxe1+ 18. Qxe1 Re8 19. Qd2 Be5 20. a5 Qg4 21. Bg3 Bxg3 22. hxg3 a6 23. Re1 Re6 24. b6 h5 25. Rxe6 Qxe6 26. Qe2 Qc6 27. Qf3 Kf8 28. Qxc6 Bxc6 29. Be2 Ke7 30. g4 hxg4 31. Bxg4 Bb7 32. Be2 Kd6 33. Bd3 Ke5 34. Kh2 g5 35. g4 f6 36. Kg3 Kd6 37. Bf5 Ke5 38. Bg6 Kd6 39. f3 Ke5 40. Kf2 Kd6 41. Bf5 Ke5 42. Ke2 Kd6 43. Kd2 Ke5 44. Ke1 Kd6 45. Kf2 Ke5 46. Kg3 Kd6 47. f4 Ke7 48. Bg6 Kd6 49. Bf7 Ke7 50. Bg8 Kd6 51. f5 Ke5 52. Kf2 Kd6 53. Ke2 Ke7 54. Kd3 Kd6 55. Be6 Ke5 56. Bd5 Bxd5 57. cxd5 Kd6 58. Kc4 Kd7 59. Kxc5 d3 60. d6 d2 61. b7 d1Q 62. b8Q Qg1+ 63. Kd5 1/2-1/2

[Event "Warsaw YMCA Winter-A 296th"]
[Site "Warsaw"]
[Date "2025.01.28"]
[Round "1"]
[White "Mazurek, Jerzy"]
[Black "Sternik, Piotr"]
[Result "0-1"]
[ECO "C42"]
[WhiteElo "1895"]
[BlackElo "1902"]
[PlyCount "68"]
[EventDate "2025.01.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "CB14_2025"]
[SourceDate "2024.11.01"]
[SourceVersion "1"]
[SourceVersionDate "2024.11.01"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Nc3 Nxc3 6. dxc3 Be7 7. Be3 0-0 8. Qd2 Nc6 9. 0-0-0 Ne5 10. Nd4 a5 11. f4 Ng4 12. Bg1 d5 13. Nf3 c6 14. Kb1 a4 15. a3 Qc7 16. h3 Nf6 17. Be3 Ne4 18. Qe1 Bd6 19. Qh4 Re8 20. Bc1 Qb6 21. Ka2 Qf2 22. Bd3 Be7 23. Qh5 g6 24. Qe5 f6 25. Qd4 Qxd4 26. cxd4 Nf2 27. Rdf1 Nxh1 28. Rxh1 Bd6 29. g4 Bd7 30. g5 fxg5 31. Nxg5 Rf8 32. h4 Bxf4 33. Kb1 Bxc1 34. Kxc1 h6 0-1

[Event "Warsaw YMCA Winter-A 296th"]
[Site "Warsaw"]
[Date "2025.01.24"]
[Round "3"]
[White "Mazurek, Jerzy"]
[Black "Pettersson, Alexander"]
[Result "1-0"]
[ECO "B17"]
[WhiteElo "1895"]
[BlackElo "1858"]
[PlyCount "61"]
[EventDate "2025.01.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "CB14_2025"]
[SourceDate "2024.11.01"]
[SourceVersion "1"]
[SourceVersionDate "2024.11.01"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nd7 5. Ng5 Ngf6 6. Bd3 e6 7. N1f3 Bd6 8. Qe2 h6 9. Ne4 Nxe4 10. Qxe4 Qc7 11. Bd2 b6 12. Qg4 Kf8 13. Qe4 Bb7 14. Qe2 c5 15. 0-0-0 Bf4 16. Kb1 Bxd2 17. Rxd2 Rc8 18. Be4 Bxe4 19. Qxe4 Nf6 20. Qe2 c4 21. c3 b5 22. Ne5 Qb7 23. f3 Nd5 24. Ka1 Ke7 25. f4 g6 26. Re1 Rhe8 27. f5 gxf5 28. Qh5 Rf8 29. Qxh6 Rh8 30. Qg7 Rb8 31. Ng6+ 1-0

[Event "Warsaw YMCA Winter-A 296th"]
[Site "Warsaw"]
[Date "2025.01.17"]
[Round "2"]
[White "Kasperkiewicz, Pawel"]
[Black "Mazurek, Jerzy"]
[Result "1/2-1/2"]
[ECO "C54"]
[WhiteElo "1910"]
[BlackElo "1895"]
[PlyCount "155"]
[EventDate "2025.01.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "CB14_2025"]
[SourceDate "2024.11.01"]
[SourceVersion "1"]
[SourceVersionDate "2024.11.01"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. 0-0 a6 6. c3 Ba7 7. h3 d6 8. a4 h6 9. Re1 0-0 10. Nbd2 Re8 11. Nf1 Be6 12. Bxe6 Rxe6 13. Ng3 d5 14. Qb3 Rb8 15. Be3 Bxe3 16. Rxe3 g6 17. Rae1 d4 18. cxd4 Nxd4 19. Nxd4 Qxd4 20. Ne2 Qb6 21. Qa2 Rd8 22. Rc1 Red6 23. Qa3 c6 24. a5 Qc7 25. Rc4 Qd7 26. Rc3 Qe7 27. Rb3 R6d7 28. Qxe7 Rxe7 29. f4 exf4 30. Nxf4 Nd5 31. Nxd5 cxd5 32. Kf2 dxe4 33. Rxe4 Rxd3 34. Rxd3 Rxe4 35. Rb3 Ra4 36. Rxb7 Rxa5 37. Ra7 Rf5+ 38. Ke3 Rf6 39. h4 h5 40. g3 Rb6 41. Kf4 Kg7 42. Kf3 Kf6 43. Kf4 Rb4+ 44. Kf3 Ra4 45. Kg2 Ke6 46. Kf3 f6 47. b3 Ra5 48. Kf4 g5+ 49. hxg5 fxg5+ 50. Ke4 Kf6 51. Ra8 Re5+ 52. Kf3 Re6 53. Rh8 Kg6 54. Rg8+ Kf5 55. Rf8+ Rf6 56. Re8 Rb6 57. Re3 Rb5 58. Rc3 a5 59. Re3 h4 60. gxh4 gxh4 61. Rc3 Kg5 62. Re3 Rf5+ 63. Kg2 Kf4 64. Rc3 Rh5 65. Kh3 Ke4 66. Kg4 Rh8 67. Kh3 Kd4 68. Rc4+ Kd3 69. Ra4 Rh5 70. b4 axb4 71. Rxb4 Ke3 72. Rb3+ Kd2 73. Rb2+ Kc3 74. Ra2 Kb3 75. Rf2 Rh8 76. Rf4 Ka3 77. Rxh4 Rxh4+ 78. Kxh4 1/2-1/2

[Event "Warsaw YMCA Spring-B 287th"]
[Site "Warsaw"]
[Date "2024.06.19"]
[Round "11"]
[White "Kwiecinski, Rafal"]
[Black "Mazurek, Jerzy"]
[Result "0-1"]
[ECO "B30"]
[WhiteElo "1759"]
[BlackElo "1839"]
[PlyCount "76"]
[EventDate "2024.04.11"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 Qa5+ 5. Nc3 Nd4 6. Bc4 b5 7. Bb3 Nxb3 8. cxb3 d6 9. Bd2 b4 10. Ne2 Qb5 11. Bg5 Nd7 12. Qc2 h6 13. Be3 Ba6 14. Rd1 e6 15. 0-0 Be7 16. Rfe1 Rc8 17. Qb1 Ne5 18. Nc1 0-0 19. Kh1 Ng4 20. Ne2 d5 21. exd5 exd5 22. h3 Nxe3 23. fxe3 Bd6 24. d4 c4 25. bxc4 Qxc4 26. Rd2 Rfe8 27. b3 Qc7 28. Rc1 Qe7 29. Rxc8 Rxc8 30. Nf4 Qxe3 31. Nxd5 Qe6 32. Nxb4 Bxb4 33. d5 Qd6 34. Rd4 Ba3 35. Qe4 Rc1+ 36. Ne1 Bb5 37. Qe3 Rb1 38. Qd2 Qe5 0-1

[Event "Warsaw YMCA Spring-B 287th"]
[Site "Warsaw"]
[Date "2024.06.13"]
[Round "10"]
[White "Mazurek, Jerzy"]
[Black "Sypula, Krzysztof"]
[Result "1/2-1/2"]
[ECO "B00"]
[WhiteElo "1839"]
[BlackElo "1758"]
[PlyCount "118"]
[EventDate "2024.04.11"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. e4 b6 2. d4 Bb7 3. Nc3 e6 4. a3 Nf6 5. Bd3 c5 6. Nf3 d5 7. exd5 Nxd5 8. Bb5+ Bc6 9. Ne5 Bxb5 10. Nxb5 a6 11. Nc3 Nxc3 12. Qf3 Ra7 13. bxc3 Qd5 14. Qg3 Nd7 15. Nxd7 Rxd7 16. 0-0 Qb7 17. dxc5 bxc5 18. Bf4 f6 19. Rab1 Qc6 20. Rb8+ Kf7 21. Rfb1 Qe4 22. h4 e5 23. Be3 Rg8 24. Qh3 f5 25. Rc8 Bd6 26. Rxg8 Kxg8 27. Rd1 Qxc2 28. Rd2 Qb1+ 29. Kh2 g6 30. h5 e4+ 31. g3 Qb7 32. Qh4 Be7 33. Rxd7 Qxd7 34. Qf4 Qd6 35. Qh6 Bf8 36. Qg5 h6 37. Qxg6+ Qxg6 38. hxg6 Kg7 39. c4 Kxg6 40. Kh3 h5 41. a4 Be7 42. Kg2 Kf7 43. f3 Ke6 44. fxe4 fxe4 45. Kh2 Kf5 46. Kh3 Ke5 47. Kg2 Kd6 48. Kh3 Bf6 49. g4 hxg4+ 50. Kxg4 Bd4 51. Bd2 Ke5 52. Bf4+ Kf6 53. Bd2 Be5 54. Be3 Bd6 55. Bf4 Bf8 56. Bd2 Ke6 57. Bf4 Bg7 58. Bd2 Kd6 59. Kf5 Bd4 1/2-1/2

[Event "Warsaw YMCA Spring-B 287th"]
[Site "Warsaw"]
[Date "2024.05.30"]
[Round "8"]
[White "Pietrzak, Wojciech"]
[Black "Mazurek, Jerzy"]
[Result "0-1"]
[ECO "B22"]
[WhiteElo "1856"]
[BlackElo "1839"]
[PlyCount "104"]
[EventDate "2024.04.11"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. c3 Nf6 4. e5 Nd5 5. d4 cxd4 6. Bc4 Nb6 7. Bb3 d5 8. exd6 e6 9. cxd4 Bxd6 10. 0-0 0-0 11. Nc3 Nb4 12. Bg5 Be7 13. Bxe7 Qxe7 14. d5 N4xd5 15. Bxd5 Nxd5 16. Nxd5 exd5 17. Nd4 Qf6 18. Qa4 Bd7 19. Qxd7 Qxd4 20. Rad1 Qxb2 21. Qxd5 b6 22. Rd2 Qf6 23. Rfd1 g6 24. g3 Rae8 25. Qb7 Re7 26. Rd7 Re2 27. Qg2 Rfe8 28. h4 Rxa2 29. R7d6 Re6 30. Rxe6 Qxe6 31. Rd8+ Kg7 32. Qf3 Qe1+ 33. Kg2 Ra1 34. Kh3 Qh1+ 35. Qxh1 Rxh1+ 36. Kg4 h5+ 37. Kf4 a5 38. Rb8 Rb1 39. Ke5 Rb4 40. Kd5 a4 41. Ra8 Rb5+ 42. Kc4 Ra5 43. Re8 a3 44. Re1 a2 45. Ra1 Kf6 46. f3 Ra3 47. g4 hxg4 48. fxg4 Ra4+ 49. Kb5 Rxg4 50. Rxa2 Rxh4 51. Rf2+ Ke6 52. Kxb6 Rc4 0-1

[Event "Warsaw YMCA Spring-B 287th"]
[Site "Warsaw"]
[Date "2024.05.23"]
[Round "7"]
[White "Mazurek, Jerzy"]
[Black "Kacprzak, Karol"]
[Result "1-0"]
[ECO "B19"]
[WhiteElo "1839"]
[BlackElo "1810"]
[PlyCount "117"]
[EventDate "2024.04.11"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 Nd7 8. h5 Bh7 9. Bd3 Bxd3 10. Qxd3 e6 11. Bd2 Ngf6 12. 0-0-0 Qc7 13. Kb1 0-0-0 14. c4 Bd6 15. Ne4 Nxe4 16. Qxe4 Nf6 17. Qe2 c5 18. Bc3 cxd4 19. Nxd4 Qc5 20. Ka1 Qe5 21. Qc2 Qe4 22. Qa4 Bc5 23. f3 Qf4 24. Qb5 Bxd4 25. Bxd4 a6 26. Qc5+ Qc7 27. Qa7 Qb8 28. Qxb8+ Kxb8 29. Be5+ Kc8 30. g4 Rxd1+ 31. Rxd1 Rd8 32. Rxd8+ Kxd8 33. Bxf6+ gxf6 34. b4 Ke7 35. Kb2 f5 36. gxf5 e5 37. c5 Kf6 38. a4 Kxf5 39. Kc3 Ke6 40. Kc4 f5 41. b5 a5 42. b6 Kd7 43. Kd5 e4 44. fxe4 f4 45. Kd4 Kc6 46. e5 f3 47. Ke3 f2 48. Kxf2 Kxc5 49. Ke3 Kxb6 50. Kd4 Kc6 51. Kc4 b6 52. e6 Kd6 53. Kb5 Kxe6 54. Kxb6 Kd6 55. Kxa5 Kc5 56. Ka6 Kc6 57. a5 Kc7 58. Kb5 Kb7 59. Kc5 1-0

[Event "Warsaw YMCA Spring-B 287th"]
[Site "Warsaw"]
[Date "2024.05.16"]
[Round "6"]
[White "Sternik, Piotr"]
[Black "Mazurek, Jerzy"]
[Result "1-0"]
[ECO "D37"]
[WhiteElo "1875"]
[BlackElo "1839"]
[PlyCount "59"]
[EventDate "2024.04.11"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Nc3 a6 5. cxd5 exd5 6. Bg5 Be6 7. e3 Bd6 8. Bd3 Nbd7 9. 0-0 c6 10. Rb1 h6 11. Bh4 0-0 12. e4 dxe4 13. Nxe4 Be7 14. Nxf6+ Bxf6 15. Bxf6 Qxf6 16. b3 Bg4 17. Be2 Rfd8 18. Qd2 Nf8 19. Rbd1 Ne6 20. d5 Nf4 21. Rde1 Rxd5 22. Qe3 Rdd8 23. Bc4 b5 24. Ne5 bxc4 25. Nxg4 Qg5 26. Qf3 h5 27. Ne5 Nd3 28. Qxf7+ Kh7 29. f4 Nxe5 30. Rxe5 1-0

[Event "Warsaw YMCA Spring-B 287th"]
[Site "Warsaw"]
[Date "2024.05.08"]
[Round "5"]
[White "Mazurek, Jerzy"]
[Black "Kania, Tomasz"]
[Result "1-0"]
[ECO "A23"]
[WhiteElo "1839"]
[BlackElo "1833"]
[PlyCount "125"]
[EventDate "2024.04.11"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. c4 Nf6 2. g3 e5 3. Bg2 Bc5 4. Nc3 c6 5. Nf3 e4 6. Ng5 d5 7. d4 Bb6 8. c5 Bc7 9. h4 Bg4 10. Nh3 0-0 11. Bf4 Re8 12. Qd2 b6 13. Na4 b5 14. Nc3 Nbd7 15. Bxc7 Qxc7 16. Nd1 e3 17. Nxe3 Rxe3 18. Qxe3 Re8 19. Qc3 Rxe2+ 20. Kf1 Ne4 21. Bxe4 dxe4 22. Nf4 Bf3 23. Rg1 b4 24. Qxb4 Rc2 25. Qb3 Rd2 26. Qc3 Rd1+ 27. Rxd1 Bxd1 28. Ke1 Bf3 29. Kd2 Nf6 30. Kc1 h6 31. h5 Nxh5 32. Nxh5 Bxh5 33. g4 Bg6 34. b3 Qd7 35. Qe3 Qd5 36. Kb2 f6 37. Rg3 Bf7 38. f3 exf3 39. Rxf3 Qd7 40. Qf4 Qd5 41. Re3 Qg2+ 42. Ka3 Bg6 43. Re1 a6 44. Rd1 Bf7 45. Rd2 Qg1 46. Kb2 Qe1 47. Qf2 Qe6 48. Qe2 Qc8 49. Qe4 Be6 50. Qf4 Bxg4 51. d5 cxd5 52. Rxd5 Be6 53. Rd6 Kf7 54. Qe4 Bf5 55. Qc4+ Kg6 56. c6 Qc7 57. Rd2 a5 58. Qc5 Bg4 59. Qd6 Qc8 60. c7 Qf5 61. Qd3 h5 62. c8Q Qxd3 63. Qe8+ 1-0

[Event "Warsaw YMCA Spring-B 287th"]
[Site "Warsaw"]
[Date "2024.05.01"]
[Round "4"]
[White "Kasperski, Marcin"]
[Black "Mazurek, Jerzy"]
[Result "1/2-1/2"]
[ECO "A29"]
[WhiteElo "1766"]
[BlackElo "1839"]
[PlyCount "134"]
[EventDate "2024.04.11"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nc3 Nb6 6. d3 Nc6 7. Nf3 Be7 8. 0-0 0-0 9. a3 Re8 10. Qc2 Bg4 11. e3 Qd7 12. b4 a6 13. Bb2 Rad8 14. Rfd1 Bf8 15. Rd2 h6 16. Rc1 Qe6 17. Ne4 f5 18. Nc5 Bxc5 19. bxc5 Nd5 20. Ne1 f4 21. e4 Nde7 22. Qc4 fxg3 23. hxg3 Nd4 24. Bxd4 Rxd4 25. Qxe6+ Bxe6 26. Rb2 Bc8 27. f4 Nc6 28. Kf2 Ra4 29. Rc3 Nd4 30. Rb4 Rxb4 31. axb4 Bd7 32. Ke3 Nb5 33. Rc1 b6 34. Nf3 exf4+ 35. gxf4 a5 36. bxa5 bxa5 37. c6 Be6 38. d4 a4 39. Bf1 Nd6 40. Ne5 Bb3 41. Ra1 Ra8 42. Ra3 Bc2 43. Bd3 Bxd3 44. Kxd3 Nb5 45. Ra2 Kh7 46. Nc4 g5 47. fxg5 hxg5 48. Ne5 Kg7 49. d5 a3 50. Nc4 Kf6 51. e5+ Ke7 52. Ne3 Ra4 53. Nf5+ Ke8 54. d6 cxd6 55. Nxd6+ Nxd6 56. exd6 Kd8 57. Rh2 Rh4 58. Ra2 Rh6 59. Ke4 Rxd6 60. Rxa3 Rxc6 61. Kf5 Rc5+ 62. Kg4 Ke7 63. Ra6 Kf7 64. Rb6 Kg7 65. Ra6 Rb5 66. Rc6 Rd5 67. Ra6 Rb5 1/2-1/2

[Event "Warsaw YMCA Spring-B 287th"]
[Site "Warsaw"]
[Date "2024.04.24"]
[Round "3"]
[White "Mazurek, Jerzy"]
[Black "Pichurko, Jakub"]
[Result "1/2-1/2"]
[ECO "B15"]
[WhiteElo "1839"]
[BlackElo "1762"]
[PlyCount "77"]
[EventDate "2024.04.11"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ exf6 6. c3 Bd6 7. Bd3 0-0 8. Ne2 Re8 9. Qc2 h5 10. h4 Na6 11. Be3 Be6 12. 0-0 b5 13. a4 Nc7 14. Bf4 b4 15. Bxd6 Qxd6 16. Rfe1 Nd5 17. c4 Nf4 18. Nxf4 Qxf4 19. Re4 Qd6 20. Rae1 f5 21. Re5 g6 22. d5 cxd5 23. cxd5 Bd7 24. Rxe8+ Rxe8 25. Rxe8+ Bxe8 26. Qc8 Qd7 27. Qc5 Qxa4 28. d6 a5 29. Bc4 Qc6 30. Qe5 a4 31. Bd5 Qd7 32. Qf6 Kh7 33. Qe5 a3 34. bxa3 bxa3 35. Ba2 Qc6 36. Kh2 Qd7 37. Kg1 Qa4 38. Qe7 Qd7 39. Qe5 1/2-1/2

[Event "Warsaw YMCA Spring-B 287th"]
[Site "Warsaw"]
[Date "2024.04.18"]
[Round "2"]
[White "Pettersson, Alexander"]
[Black "Mazurek, Jerzy"]
[Result "1/2-1/2"]
[ECO "D12"]
[WhiteElo "1856"]
[BlackElo "1839"]
[PlyCount "61"]
[EventDate "2024.04.11"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. e3 c6 4. c4 Bf5 5. cxd5 cxd5 6. Qb3 Qb6 7. Qxb6 axb6 8. Bb5+ Bd7 9. Bd3 b5 10. Ne5 b4 11. Bd2 e6 12. Ke2 Bd6 13. Rc1 0-0 14. Be1 Nc6 15. Nxd7 Nxd7 16. Nd2 e5 17. Bb5 exd4 18. Bxc6 d3+ 19. Kxd3 bxc6 20. Nf3 Ra6 21. Nd4 c5 22. Nf5 Be5 23. Kc2 Bf6 24. Rd1 Nb6 25. e4 d4 26. f4 g6 27. Ng3 Nc4 28. Bf2 d3+ 29. Rxd3 Bxb2 30. Rad1 Bc3 31. Bxc5 1/2-1/2

[Event "Warsaw YMCA Spring-B 287th"]
[Site "Warsaw"]
[Date "2024.04.11"]
[Round "1"]
[White "Mazurek, Jerzy"]
[Black "Szukalski, Antoni"]
[Result "1-0"]
[ECO "B19"]
[WhiteElo "1839"]
[BlackElo "1792"]
[PlyCount "47"]
[EventDate "2024.04.11"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 Nf6 8. Ne5 Bh7 9. Bd3 Bxd3 10. Qxd3 Nbd7 11. f4 e6 12. Bd2 Qb6 13. 0-0-0 a5 14. f5 Nxe5 15. dxe5 Rd8 16. Qf3 Nd5 17. fxe6 fxe6 18. c4 Qc5 19. Qg4 Nc7 20. Qh5+ Ke7 21. Bg5+ hxg5 22. Qxg5+ Kf7 23. Rhf1+ Kg8 24. Rxd8 1-0

[Event "Warsaw YMCA Winter-A 282nd"]
[Site "Warsaw"]
[Date "2024.03.19"]
[Round "11"]
[White "Kowalski, Witold"]
[Black "Mazurek, Jerzy"]
[Result "1-0"]
[ECO "B45"]
[WhiteElo "1667"]
[BlackElo "1712"]
[PlyCount "111"]
[EventDate "2024.01.12"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e6 5. Nc3 Qc7 6. a3 Nf6 7. Nb3 a6 8. Bd3 Be7 9. 0-0 0-0 10. f4 d6 11. Qf3 Bd7 12. Bd2 Rfc8 13. Rae1 b5 14. Nd1 e5 15. f5 a5 16. c3 a4 17. Nc1 Na5 18. g4 d5 19. exd5 e4 20. Bxe4 Nxe4 21. Qxe4 Re8 22. Qg2 Bh4 23. Rxe8+ Rxe8 24. Bf4 Qb6+ 25. Kh1 Bc8 26. Nd3 Bb7 27. Nb4 Nc4 28. Qf3 h6 29. Kg2 Qc5 30. Kh3 Bd8 31. Nf2 Qe7 32. Nfd3 Qh4+ 33. Kg2 Nb6 34. Nc5 Bxd5 35. Nxd5 Nxd5 36. Qxd5 Qxg4+ 37. Kh1 Bb6 38. Nd7 Qe2 39. Qg2 Bd8 40. Qxe2 Rxe2 41. Rb1 Rf2 42. Bg3 Rxf5 43. Re1 Kh7 44. Nf8+ Kg8 45. Re8 Bg5 46. Nd7+ Kh7 47. Nf8+ Kg8 48. Ne6+ Kh7 49. Nxg5+ Rxg5 50. Kg2 Rd5 51. Kf3 f5 52. Re7 Kg6 53. Be5 Rd2 54. Rxg7+ Kh5 55. Rg2 Rd5 56. Kf4 1-0

[Event "Warsaw YMCA Winter-A 282nd"]
[Site "Warsaw"]
[Date "2024.03.15"]
[Round "10"]
[White "Mazurek, Jerzy"]
[Black "Krupa, Bartlomiej"]
[Result "1-0"]
[ECO "B90"]
[WhiteElo "1712"]
[BlackElo "1779"]
[PlyCount "57"]
[EventDate "2024.01.12"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f3 e5 7. Nb3 Be6 8. Be3 Be7 9. Qd2 0-0 10. 0-0-0 Nbd7 11. g4 b5 12. Nd5 Bxd5 13. exd5 Nb6 14. Na5 Nfxd5 15. Nc6 Qd7 16. Nxe7+ Qxe7 17. Bxb6 Nxb6 18. Qxd6 Qg5+ 19. Qd2 Qxd2+ 20. Rxd2 Rfd8 21. Bd3 Rd7 22. Rhd1 Rad8 23. a4 bxa4 24. Bxa6 Rxd2 25. Rxd2 Ra8 26. Rd6 Rb8 27. c4 Kf8 28. c5 Ke7 29. Rxb6 1-0

[Event "Warsaw YMCA Winter-A 282nd"]
[Site "Warsaw"]
[Date "2024.03.08"]
[Round "9"]
[White "Pettersson, Alexander"]
[Black "Mazurek, Jerzy"]
[Result "1/2-1/2"]
[ECO "A26"]
[WhiteElo "1799"]
[BlackElo "1712"]
[PlyCount "67"]
[EventDate "2024.01.12"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. c4 d6 5. 0-0 e5 6. Nc3 0-0 7. d3 Nc6 8. Rb1 a5 9. a3 h6 10. b4 axb4 11. axb4 Be6 12. b5 Nd4 13. Nxd4 exd4 14. Nd5 Bxd5 15. Bxd5 Nxd5 16. cxd5 Ra2 17. Rb2 Rxb2 18. Bxb2 Qg5 19. Qb3 Re8 20. Bc1 Qh5 21. e4 dxe3 22. fxe3 Re5 23. e4 Qe2 24. Qd1 Qxd1 25. Rxd1 Re8 26. Kf2 Ra8 27. Be3 b6 28. Rc1 Ra7 29. Kf3 Kf8 30. Rb1 Ke8 31. Rb3 Ra2 32. h3 Kd7 33. Bf2 Ra4 34. Be3 1/2-1/2

[Event "Warsaw YMCA Winter-A 282nd"]
[Site "Warsaw"]
[Date "2024.03.01"]
[Round "8"]
[White "Mazurek, Jerzy"]
[Black "Pietrzak, Wojciech"]
[Result "0-1"]
[ECO "D33"]
[WhiteElo "1712"]
[BlackElo "1754"]
[PlyCount "86"]
[EventDate "2024.01.12"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 c4 7. Bg2 Bb4 8. 0-0 Nge7 9. Ne1 0-0 10. Nc2 Bf5 11. Be3 a5 12. f3 Qd7 13. Re1 Bxc2 14. Qxc2 Nf5 15. Qd2 Nxe3 16. Qxe3 Rfe8 17. Qd2 Rac8 18. Kh1 b5 19. a3 Bxc3 20. bxc3 Qe7 21. e4 dxe4 22. fxe4 b4 23. axb4 axb4 24. cxb4 Qxb4 25. Qf2 c3 26. Rf1 Qc4 27. e5 Nxd4 28. Ra5 c2 29. Bd5 Qxf1+ 30. Qxf1 c1Q 31. Bxf7+ Kf8 32. Ra1 Qxf1+ 33. Rxf1 Ke7 34. Bxe8 Rxe8 35. Kg2 Ke6 36. Kh3 Nc6 37. Kh4 Rd8 38. g4 Rd4 39. Kh5 Nxe5 40. h3 Rd3 41. h4 Rd4 42. Rg1 Nf7 43. Re1+ Kd5 0-1

[Event "Warsaw YMCA Winter-A 282nd"]
[Site "Warsaw"]
[Date "2024.02.16"]
[Round "6"]
[White "Mazurek, Jerzy"]
[Black "Koziol, Pawel"]
[Result "0-1"]
[ECO "A24"]
[WhiteElo "1712"]
[BlackElo "1647"]
[PlyCount "100"]
[EventDate "2024.01.12"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. e4 g6 2. c4 Bg7 3. Nc3 d6 4. g3 Nf6 5. Bg2 0-0 6. Nge2 c6 7. 0-0 a6 8. d3 e5 9. h3 b5 10. a3 Nbd7 11. f4 Bb7 12. f5 Nb6 13. b3 d5 14. exd5 cxd5 15. c5 Nbd7 16. b4 e4 17. g4 exd3 18. Qxd3 Ne5 19. Qb1 Ne4 20. Nxe4 dxe4 21. Bxe4 Bxe4 22. Qxe4 Re8 23. Rb1 Nc4 24. Qf3 Ne5 25. Qg2 Qd3 26. Bb2 Rad8 27. Nf4 Qe3+ 28. Qf2 Nf3+ 29. Kh1 Nd2 30. Qxe3 Rxe3 31. Bxg7 Nxf1 32. Bf6 Ng3+ 33. Kg1 Rd2 34. Bg5 Ne4 35. Ng2 Rxg2+ 36. Kxg2 Nxg5 37. h4 Ne4 38. Rd1 Kg7 39. fxg6 hxg6 40. g5 Rc3 41. Rd4 Ng3 42. Rd6 Rxa3 43. Rb6 Nf5 44. c6 Rc3 45. Rxa6 Nd4 46. h5 gxh5 47. c7 Rxc7 48. Rh6 Rc4 49. Rxh5 Rxb4 50. Rh6 Ne6 0-1

[Event "Warsaw YMCA Winter-A 282nd"]
[Site "Warsaw"]
[Date "2024.02.09"]
[Round "5"]
[White "Sternik, Piotr"]
[Black "Mazurek, Jerzy"]
[Result "1-0"]
[ECO "E94"]
[WhiteElo "1829"]
[BlackElo "1712"]
[PlyCount "55"]
[EventDate "2024.01.12"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. Nf3 e5 7. 0-0 Bg4 8. Be3 Bxf3 9. Bxf3 exd4 10. Bxd4 Nc6 11. Be3 Nd7 12. Qd2 Nc5 13. Rad1 Ne6 14. g3 Ncd4 15. Bg2 Rb8 16. f4 c5 17. f5 Nc7 18. Bh6 gxf5 19. exf5 Qf6 20. Bg5 Qxf5 21. Rxf5 Nxf5 22. Rf1 Nd4 23. Bh6 Bxh6 24. Qxh6 Nce6 25. Be4 f5 26. Bxf5 Rxf5 27. Rxf5 Nxf5 28. Qxe6+ 1-0

[Event "Warsaw YMCA Winter-A 282nd"]
[Site "Warsaw"]
[Date "2024.02.02"]
[Round "4"]
[White "Mazurek, Jerzy"]
[Black "Lewandrowski, Tomasz"]
[Result "1/2-1/2"]
[ECO "B47"]
[WhiteElo "1712"]
[BlackElo "1822"]
[PlyCount "91"]
[EventDate "2024.01.12"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. g3 Qc7 6. Bg2 Nc6 7. Nc3 Bb4 8. 0-0 Nge7 9. Be3 Bxc3 10. bxc3 Ne5 11. f4 Qxc3 12. Bf2 N5c6 13. Nxc6 Nxc6 14. Qd6 f6 15. e5 f5 16. Bc5 Kf7 17. g4 Re8 18. gxf5 exf5 19. Bd5+ Re6 20. Bxe6+ dxe6 21. Qf8+ Kg6 22. Rab1 Nd4 23. Bxd4 Qxd4+ 24. Rf2 b5 25. Qe8+ Kh6 26. Qe7 g6 27. Qg5+ Kg7 28. Qe7+ Kg8 29. Qe8+ Kg7 30. Qe7+ Kg8 31. c3 Qe4 32. Qe8+ Kg7 33. Qe7+ Kg8 34. Qd8+ Kg7 35. Rd1 Kh6 36. Rd3 Bb7 37. Qg5+ Kg7 38. Qf6+ Kg8 39. Qxe6+ Kf8 40. Qf6+ Kg8 41. Rd8+ Rxd8 42. Qxd8+ Kg7 43. Qe7+ Kg8 44. Qe8+ Kg7 45. Qe7+ Kg8 46. Qe8+ 1/2-1/2

[Event "Warsaw YMCA Winter-A 282nd"]
[Site "Warsaw"]
[Date "2024.02.02"]
[Round "7"]
[White "Sypula, Krzysztof"]
[Black "Mazurek, Jerzy"]
[Result "0-1"]
[ECO "E14"]
[WhiteElo "1662"]
[BlackElo "1712"]
[PlyCount "48"]
[EventDate "2024.01.12"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. Nf3 Nf6 2. e3 d5 3. c4 e6 4. b3 Bd6 5. Bb2 0-0 6. Nc3 b6 7. d4 Bb7 8. Bd3 Nbd7 9. 0-0 Re8 10. cxd5 exd5 11. Qc2 a6 12. Rfe1 Ne4 13. Bf1 Ndf6 14. Nd1 Nd7 15. g3 Qf6 16. Bg2 Qh6 17. a4 a5 18. Ba3 Rac8 19. Nc3 Bxa3 20. Rxa3 c5 21. Qb2 cxd4 22. exd4 Rxc3 23. Ne5 Qd2 24. Qxd2 Nxd2 0-1

[Event "Warsaw YMCA Winter-A 282nd"]
[Site "Warsaw"]
[Date "2024.01.26"]
[Round "3"]
[White "Szukalski, Antoni"]
[Black "Mazurek, Jerzy"]
[Result "0-1"]
[ECO "D37"]
[WhiteElo "1655"]
[BlackElo "1712"]
[PlyCount "72"]
[EventDate "2024.01.12"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. e3 Be7 5. Nf3 0-0 6. Bd3 dxc4 7. Bxc4 c5 8. 0-0 a6 9. dxc5 Bxc5 10. a4 Qc7 11. b3 b6 12. Ba3 Bxa3 13. Rxa3 Bb7 14. Ra2 Nbd7 15. h3 Rfc8 16. Rd2 Bxf3 17. gxf3 Ne5 18. Rd4 Rd8 19. Ne4 Nxe4 20. fxe4 Rxd4 21. exd4 Nxc4 22. Qc2 Rc8 23. Rc1 Qd8 24. bxc4 Qxd4 25. Rd1 Qc5 26. Qd3 g6 27. Qd7 Qxc4 28. Qb7 b5 29. axb5 axb5 30. Rd7 Qc1+ 31. Kg2 Qg5+ 32. Kh2 Qf4+ 33. Kg2 Rc2 34. Qb6 Qxe4+ 35. Kh2 Rc1 36. Qxb5 Rh1+ 0-1

[Event "Warsaw YMCA Winter-A 282nd"]
[Site "Warsaw"]
[Date "2024.01.24"]
[Round "1"]
[White "Mazurek, Jerzy"]
[Black "Huseynzade, Jeyhun Qalib"]
[Result "0-1"]
[ECO "B90"]
[WhiteElo "1712"]
[BlackElo "1991"]
[PlyCount "90"]
[EventDate "2024.01.12"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f3 e5 7. Nb3 b5 8. Be3 Bb7 9. Qd2 Nbd7 10. Be2 Be7 11. 0-0-0 Rc8 12. Kb1 Nb6 13. Na5 Ba8 14. Bxb6 Qxb6 15. Nd5 Nxd5 16. exd5 0-0 17. c4 Bd8 18. Nc6 Bxc6 19. dxc6 Rxc6 20. cxb5 axb5 21. Qd5 Bg5 22. f4 Bxf4 23. g3 Be3 24. Bf3 Rfc8 25. Rhf1 Qc7 26. a3 Rc2 27. Bg4 Qc4 28. Bxc8 Rc1+ 29. Rxc1 Qxd5 30. Rc2 g6 31. Bg4 f5 32. Rd1 Bd4 33. Bh3 Qb3 34. Bg2 Kg7 35. Bf1 Bxb2 36. Rd3 Bc3+ 37. Kc1 Qxa3+ 38. Kd1 Qa1+ 39. Rc1 Qa4+ 40. Ke2 Qa2+ 41. Kd1 b4 42. Rxd6 Qxh2 43. Rd3 Qf2 44. Be2 Qg1+ 45. Kc2 b3+ 0-1

[Event "Warsaw YMCA Winter-A 282nd"]
[Site "Warsaw"]
[Date "2024.01.19"]
[Round "2"]
[White "Mazurek, Jerzy"]
[Black "Choroszej, Aleksander"]
[Result "0-1"]
[ECO "B06"]
[WhiteElo "1712"]
[BlackElo "1899"]
[PlyCount "86"]
[EventDate "2024.01.12"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. d4 g6 2. e4 Bg7 3. Nc3 d6 4. Be3 a6 5. a4 b6 6. h3 Bb7 7. g4 Nf6 8. Bg2 0-0 9. Nge2 Nc6 10. 0-0 e5 11. d5 Ne7 12. Qd2 Kh8 13. Ng3 Neg8 14. Rad1 Nd7 15. b3 h6 16. Nce2 Kh7 17. f4 exf4 18. Nxf4 Ne5 19. Nd3 Qe7 20. Nxe5 Bxe5 21. Ne2 Rae8 22. Nf4 Bg7 23. Rde1 Nf6 24. Bd4 Nd7 25. Bxg7 Kxg7 26. Qc3+ Ne5 27. Nd3 Qd7 28. Rf2 c5 29. Ref1 Kg8 30. Nxe5 Rxe5 31. Rf6 Qe7 32. Qe3 Kg7 33. Qf4 Bc8 34. h4 Bf5 35. g5 hxg5 36. hxg5 Bxe4 37. Bxe4 Rxe4 38. Qxd6 Rg4+ 39. Kf2 Qe4 40. Re1 Qg2+ 41. Ke3 Rg3+ 42. Kf4 Qf3+ 43. Ke5 Rxg5+ 0-1

[Event "Warsaw YMCA Autumn-A 278th"]
[Site "Warsaw"]
[Date "2023.12.07"]
[Round "12"]
[White "Kasperkiewicz, Pawel"]
[Black "Mazurek, Jerzy"]
[Result "0-1"]
[ECO "B23"]
[WhiteElo "1784"]
[BlackElo "1746"]
[PlyCount "68"]
[EventDate "2023.09.22"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. f4 c5 2. Nf3 g6 3. e4 Bg7 4. Nc3 Nc6 5. Bb5 Nd4 6. Nxd4 cxd4 7. Ne2 a6 8. Bc4 b5 9. Bb3 Bb7 10. d3 e6 11. 0-0 Ne7 12. Bd2 0-0 13. c3 f5 14. e5 dxc3 15. Nxc3 g5 16. d4 Qb6 17. Be3 gxf4 18. Bf2 Qc6 19. d5 Nxd5 20. Bxd5 exd5 21. Bd4 Rae8 22. Re1 Qg6 23. Qd3 Bxe5 24. Rxe5 Rxe5 25. Bxe5 d4 26. Qd2 dxc3 27. Bxc3 Re8 28. Kf1 f3 29. gxf3 Bxf3 30. Qf2 Be2+ 31. Ke1 Bg4+ 32. Kd2 Re2+ 33. Qxe2 Bxe2 34. Kxe2 Qg2+ 0-1

[Event "Warsaw YMCA Autumn-A 278th"]
[Site "Warsaw"]
[Date "2023.12.01"]
[Round "11"]
[White "Mazurek, Jerzy"]
[Black "Kaniak, Monika"]
[Result "0-1"]
[ECO "B15"]
[WhiteElo "1746"]
[BlackElo "1796"]
[PlyCount "96"]
[EventDate "2023.09.22"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ exf6 6. c3 Bd6 7. Bd3 0-0 8. Qc2 g6 9. Bh6 Re8+ 10. Ne2 Be6 11. h4 Nd7 12. h5 f5 13. hxg6 fxg6 14. g4 Bd5 15. 0-0-0 Bxh1 16. Rxh1 Bf8 17. Bxf8 Nxf8 18. gxf5 Qd5 19. Rg1 Qxa2 20. fxg6 Qa1+ 21. Qb1 Qxb1+ 22. Kxb1 hxg6 23. Nf4 Re7 24. Nxg6 Nxg6 25. Rxg6+ Rg7 26. Rf6 Rg1+ 27. Ka2 Kg7 28. Rd6 Rf8 29. Rd7+ Rf7 30. Rxf7+ Kxf7 31. Be4 Rc1 32. Kb3 Ke6 33. Kc4 Rd1 34. f3 Kd6 35. Kb4 b6 36. f4 Rf1 37. f5 Rf4 38. Bb1 c5+ 39. Kc4 a6 40. b4 b5+ 41. Kb3 cxd4 42. cxd4 Rxd4 43. Kc3 Rc4+ 44. Kb3 Ke5 45. Bd3 Rf4 46. Kc3 Rf3 47. Kd2 Kd4 48. Bc2 Rf2+ 0-1

[Event "Warsaw YMCA Autumn-A 278th"]
[Site "Warsaw"]
[Date "2023.11.21"]
[Round "9"]
[White "Mazurek, Jerzy"]
[Black "Kania, Tomasz"]
[Result "1/2-1/2"]
[ECO "B19"]
[WhiteElo "1746"]
[BlackElo "1703"]
[PlyCount "74"]
[EventDate "2023.09.22"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 e6 8. Ne5 Bh7 9. Bd3 Bxd3 10. Qxd3 Nd7 11. f4 Be7 12. h5 Ngf6 13. Bd2 Qc7 14. 0-0-0 0-0 15. Ne4 Nxe4 16. Qxe4 Nf6 17. Qe2 c5 18. dxc5 Qxc5 19. Kb1 Rfd8 20. g4 Nd7 21. Nf3 Rac8 22. Be3 Qc4 23. Qg2 Bf6 24. Bc1 Nc5 25. Rxd8+ Rxd8 26. g5 hxg5 27. fxg5 Be7 28. h6 Qe4 29. hxg7 Qg6 30. Qh3 Qxg7 31. b3 Ne4 32. Bb2 Nc3+ 33. Bxc3 Qxc3 34. Qh7+ Kf8 35. g6 fxg6 36. Qh6+ Qg7 37. Qf4+ Kg8 1/2-1/2

[Event "Warsaw YMCA Autumn-A 278th"]
[Site "Warsaw"]
[Date "2023.11.09"]
[Round "8"]
[White "Polak, Michal"]
[Black "Mazurek, Jerzy"]
[Result "1-0"]
[ECO "A46"]
[WhiteElo "1947"]
[BlackElo "1746"]
[PlyCount "69"]
[EventDate "2023.09.22"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. g3 e6 4. Bg2 b5 5. 0-0 Be7 6. Nbd2 0-0 7. Ne5 Bb7 8. a4 b4 9. c4 bxc3 10. bxc3 Nbd7 11. f4 c5 12. a5 Qc8 13. Qa4 Ba6 14. Re1 cxd4 15. cxd4 Nxe5 16. fxe5 Ng4 17. e4 Qc3 18. Nf3 dxe4 19. Rxe4 Bb5 20. Qa2 f5 21. exf6 Rxf6 22. Bd2 Qd3 23. Rxg4 Bc4 24. Ne5 Bxa2 25. Nxd3 Bd5 26. Ne5 Bxg2 27. Kxg2 Bd6 28. Rf4 Bxe5 29. dxe5 Rxf4 30. Bxf4 a6 31. Rc1 Ra7 32. Be3 Rb7 33. Bb6 h6 34. Rc8+ Kh7 35. Re8 1-0

[Event "Warsaw YMCA Autumn-A 278th"]
[Site "Warsaw"]
[Date "2023.11.03"]
[Round "7"]
[White "Mazurek, Jerzy"]
[Black "Adamski, Adam"]
[Result "0-1"]
[ECO "A59"]
[WhiteElo "1746"]
[BlackElo "1761"]
[PlyCount "78"]
[EventDate "2023.09.22"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 6. Nc3 d6 7. e4 Bxf1 8. Kxf1 g6 9. Nf3 Bg7 10. g3 Nbd7 11. h3 0-0 12. Kg2 Qb6 13. Qe2 Rfb8 14. a4 Ne8 15. Bd2 Nc7 16. Rhb1 Qa7 17. Ra3 Rb7 18. Nd1 Qb8 19. Bc3 Rb3 20. Raa1 Bxc3 21. Nxc3 Qb7 22. Qc2 Rb8 23. Ra2 Rb4 24. Nd1 Nf6 25. Nd2 Qa6 26. Nc3 Nd7 27. Ra3 Ne5 28. Na2 R4b7 29. f4 Qe2+ 30. Kg1 Nc4 31. Qxc4 Qxd2 32. Rd3 Qa5 33. b3 Nb5 34. Rb2 Qe1+ 35. Kg2 Nd4 36. Nc3 Rb4 37. Qa6 Rxb3 38. Rxb3 Rxb3 39. Qc4 Rb2+ 0-1

[Event "Warsaw YMCA Autumn-A 278th"]
[Site "Warsaw"]
[Date "2023.10.20"]
[Round "5"]
[White "Liberadzki, Slawomir"]
[Black "Mazurek, Jerzy"]
[Result "1-0"]
[ECO "A25"]
[WhiteElo "1958"]
[BlackElo "1746"]
[PlyCount "63"]
[EventDate "2023.09.22"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nc6 3. g3 Bc5 4. Nf3 a6 5. Bg2 d6 6. a3 Ba7 7. d3 Nge7 8. b4 Nd4 9. e3 Nxf3+ 10. Qxf3 0-0 11. 0-0 c6 12. b5 axb5 13. cxb5 d5 14. a4 d4 15. bxc6 bxc6 16. Nb5 dxe3 17. Nxa7 Rxa7 18. Qxe3 Qc7 19. Bb2 f6 20. d4 exd4 21. Bxd4 Rb7 22. Bc5 Rd8 23. a5 Nd5 24. Bxd5+ cxd5 25. Bb6 Rxb6 26. Qxb6 Qxb6 27. axb6 Bb7 28. Ra7 Rb8 29. Rc1 d4 30. Rxb7 Rxb7 31. Rc8+ Kf7 32. Rc7+ 1-0

[Event "Warsaw YMCA Autumn-A 278th"]
[Site "Warsaw"]
[Date "2023.10.12"]
[Round "4"]
[White "Mazurek, Jerzy"]
[Black "Pietrzak, Wojciech"]
[Result "1/2-1/2"]
[ECO "C78"]
[WhiteElo "1746"]
[BlackElo "1717"]
[PlyCount "57"]
[EventDate "2023.09.22"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 b5 6. Bb3 Bc5 7. a4 Bb7 8. c3 0-0 9. d4 Bb6 10. Bg5 h6 11. Bxf6 Qxf6 12. Bd5 exd4 13. cxd4 Rab8 14. e5 Qf4 15. axb5 axb5 16. Bxc6 dxc6 17. Qd2 Qxd2 18. Nbxd2 c5 19. dxc5 Bxc5 20. Rfc1 Bb6 21. Nb3 Bxf3 22. gxf3 Rfe8 23. Nc5 Rxe5 24. Nd7 Rg5+ 25. Kf1 Re8 26. Nxb6 cxb6 27. Rc6 Rg6 28. Rxg6 fxg6 29. Rd1 1/2-1/2

[Event "Warsaw YMCA Autumn-A 278th"]
[Site "Warsaw"]
[Date "2023.10.06"]
[Round "3"]
[White "Choroszej, Aleksander"]
[Black "Mazurek, Jerzy"]
[Result "1/2-1/2"]
[ECO "D37"]
[WhiteElo "1878"]
[BlackElo "1746"]
[PlyCount "84"]
[EventDate "2023.09.22"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 a6 5. cxd5 exd5 6. Bg5 Be6 7. e3 Nbd7 8. Bd3 Bd6 9. 0-0 c6 10. Qc2 Qc7 11. Bh4 Bg4 12. Bg3 Bxf3 13. gxf3 h5 14. e4 dxe4 15. fxe4 h4 16. Bxd6 Qxd6 17. Ne2 Ng4 18. e5 Ndxe5 19. dxe5 Qxe5 20. Ng3 Nxh2 21. Kxh2 hxg3+ 22. Kg1 0-0-0 23. Bf5+ Kb8 24. Rae1 Qd4 25. Qe4 gxf2+ 26. Rxf2 Qb6 27. Qe3 Qb4 28. Ree2 Rh4 29. a3 Rd1+ 30. Kg2 Qc4 31. Rd2 Rxd2 32. Rxd2 Rh8 33. Qe7 Qf4 34. Rd8+ Rxd8 35. Qxd8+ Ka7 36. Qd3 g6 37. Be4 f5 38. Bf3 g5 39. b4 g4 40. Be2 Ka8 41. Qd8+ Ka7 42. Qd3 Ka8 1/2-1/2

[Event "Warsaw YMCA Autumn-A 278th"]
[Site "Warsaw"]
[Date "2023.09.28"]
[Round "2"]
[White "Mazurek, Jerzy"]
[Black "Sternik, Piotr"]
[Result "0-1"]
[ECO "D35"]
[WhiteElo "1746"]
[BlackElo "1829"]
[PlyCount "66"]
[EventDate "2023.09.22"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Be7 4. cxd5 exd5 5. Bf4 c6 6. e3 Nf6 7. Bd3 Qb6 8. a3 Bg4 9. f3 Bh5 10. Nge2 Nbd7 11. 0-0 0-0 12. Kh1 Bg6 13. e4 dxe4 14. fxe4 Rfe8 15. Qc2 Rac8 16. Rad1 Bf8 17. e5 Bxd3 18. Rxd3 Nd5 19. Rh3 g6 20. Bg5 Bg7 21. Ne4 Re6 22. Nf4 Nxf4 23. Rxf4 Rce8 24. Rf1 Qxd4 25. Nd6 Rf8 26. Nxb7 Qxe5 27. Nd8 Qb5 28. Rhf3 Re2 29. Qxc6 Qxg5 30. Rxf7 Qxd8 31. Qc4 Rxf7 32. Qxf7+ Kh8 33. Rd1 Qe8 0-1

[Event "Warsaw YMCA Autumn-A 278th"]
[Site "Warsaw"]
[Date "2023.09.22"]
[Round "1"]
[White "Basiaga, Sebastian"]
[Black "Mazurek, Jerzy"]
[Result "1-0"]
[ECO "B20"]
[WhiteElo "1856"]
[BlackElo "1746"]
[PlyCount "63"]
[EventDate "2023.09.22"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. e4 c5 2. b3 g6 3. Bb2 Nf6 4. Nc3 d6 5. Nd5 Bg7 6. Nxf6+ exf6 7. Bb5+ Nd7 8. Nf3 0-0 9. 0-0 Nb6 10. Re1 a6 11. Bf1 d5 12. d3 Be6 13. c4 dxe4 14. dxe4 Nd7 15. Qc2 Qc7 16. g3 Rad8 17. Rad1 Nb8 18. Bg2 Nc6 19. h3 Rxd1 20. Rxd1 f5 21. Bxg7 Kxg7 22. Qc3+ Kg8 23. exf5 Bxf5 24. Qf6 Rd8 25. Re1 Qd7 26. g4 Be6 27. Ng5 Nd4 28. Bxb7 Qxb7 29. Qxd8+ Kg7 30. Qd6 h6 31. Qxc5 Nxb3 32. Nxe6+ 1-0

[Event "Warsaw Najdorf Memorial op-B"]
[Site "Warsaw"]
[Date "2023.07.19"]
[Round "9"]
[White "Posuniak, Weronika"]
[Black "Mazurek, Jerzy"]
[Result "1-0"]
[ECO "E90"]
[WhiteElo "1949"]
[BlackElo "1738"]
[PlyCount "83"]
[EventDate "2023.07.11"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. Bg5 h6 7. Be3 e5 8. d5 Ng4 9. Bd2 f5 10. Bd3 Na6 11. Qb1 Nc5 12. Bc2 a5 13. 0-0 f4 14. a3 a4 15. Nb5 Nf6 16. Bb4 b6 17. Bxc5 bxc5 18. b4 axb3 19. Qxb3 g5 20. Nd2 g4 21. f3 g3 22. h3 Nh7 23. Rfe1 Qh4 24. Nxc7 Bxh3 25. gxh3 Qxh3 26. Re2 Rab8 27. Qa4 Rf6 28. Ne6 Rg6 29. Rg2 Ng5 30. Rb1 Rxb1+ 31. Bxb1 Qh4 32. Qe8+ Kh7 33. Nf8+ Bxf8 34. Qxf8 Nh3+ 35. Kf1 Nf2 36. Qf7+ Rg7 37. Qf5+ Kh8 38. Qf8+ Rg8 39. Qxd6 Nd1 40. Qxe5+ Rg7 41. Qe8+ Kh7 42. e5+ 1-0

[Event "Warsaw Najdorf Memorial op-B"]
[Site "Warsaw"]
[Date "2023.07.16"]
[Round "6"]
[White "Mazurek, Jerzy"]
[Black "Kasperkiewicz, Pawel"]
[Result "1/2-1/2"]
[ECO "A30"]
[WhiteElo "1738"]
[BlackElo "1850"]
[PlyCount "163"]
[EventDate "2023.07.11"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. c4 b6 2. g3 Bb7 3. Nf3 c5 4. Bg2 Nf6 5. Nc3 g6 6. 0-0 Bg7 7. d3 0-0 8. e4 Nc6 9. Rb1 e6 10. Ne1 d5 11. exd5 exd5 12. Nxd5 Nxd5 13. Bxd5 Qd7 14. a3 Nd4 15. Bxb7 Qxb7 16. Be3 a5 17. Bxd4 Bxd4 18. Qf3 Qxf3 19. Nxf3 Rfd8 20. b4 axb4 21. axb4 Ra3 22. Nxd4 Rxd4 23. bxc5 bxc5 24. Rfd1 Rdxd3 25. Rxd3 Rxd3 26. Rb5 Rc3 27. Rxc5 h5 28. h4 Kg7 29. Rc6 Kh7 30. Kf1 Rc2 31. Kg2 Rc3 32. c5 Kg7 33. Rc8 Kh7 34. c6 Kg7 35. Kf1 Rc2 36. Ke1 Kf6 37. Kd1 Rc5 38. Kd2 Ke6 39. Ke3 Kd6 40. f3 Rc4 41. Rf8 Rxc6 42. Rxf7 Ke6 43. Rf8 Rc4 44. Rf4 Rc3+ 45. Kd2 Ra3 46. g4 hxg4 47. fxg4 Rh3 48. g5 Ke5 49. Ra4 Ke6 50. Ke2 Kf7 51. Kf2 Rb3 52. Kg2 Kg7 53. Rf4 Ra3 54. Rg4 Rb3 55. Rg3 Rb4 56. Kh3 Ra4 57. Rf3 Rb4 58. Kg3 Ra4 59. Rf4 Ra1 60. Kf3 Rf1+ 61. Ke4 Rxf4+ 62. Kxf4 Kf8 63. Ke4 Ke8 64. Kd4 Kd8 65. Kc4 Ke8 66. Kc5 Ke7 67. Kd5 Kd7 68. Ke5 Ke7 69. Kf4 Kf8 70. Kf3 Kf7 71. Kg4 Kg8 72. Kg3 Kg7 73. Kg2 Kg8 74. Kg3 Kg7 75. Kg4 Kg8 76. h5 gxh5+ 77. Kxh5 Kh7 78. g6+ Kg7 79. Kg5 Kg8 80. Kf6 Kf8 81. g7+ Kg8 82. Kg6 1/2-1/2

[Event "Warsaw Najdorf Memorial op-B"]
[Site "Warsaw"]
[Date "2023.07.15"]
[Round "5"]
[White "Choroszej, Aleksander"]
[Black "Mazurek, Jerzy"]
[Result "1/2-1/2"]
[ECO "D37"]
[WhiteElo "1958"]
[BlackElo "1738"]
[PlyCount "74"]
[EventDate "2023.07.11"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Nf3 Be7 5. Bf4 0-0 6. e3 c5 7. dxc5 Bxc5 8. Be2 Nc6 9. cxd5 Nxd5 10. Nxd5 exd5 11. 0-0 d4 12. Qc2 Qa5 13. a3 Bb6 14. b4 Qf5 15. Bd3 Qh5 16. b5 Ne7 17. Bd6 Re8 18. Bxe7 Rxe7 19. Nxd4 Bxd4 20. exd4 Be6 21. Rac1 Rd8 22. Rfe1 Red7 23. Be2 Qh4 24. Bf3 g6 25. Rcd1 b6 26. d5 Bxd5 27. Bxd5 Rxd5 28. Rxd5 Rxd5 29. Qc8+ Kg7 30. g3 Qf6 31. Qe8 Rd2 32. Re2 Rxe2 33. Qxe2 Qa1+ 34. Kg2 Qxa3 35. Qe5+ Kg8 36. Qb8+ Kg7 37. Qe5+ Kg8 1/2-1/2

[Event "Warsaw Najdorf Memorial op-B"]
[Site "Warsaw"]
[Date "2023.07.14"]
[Round "4"]
[White "Mazurek, Jerzy"]
[Black "Bartodziej, Bartosz"]
[Result "0-1"]
[ECO "E39"]
[WhiteElo "1738"]
[BlackElo "1840"]
[PlyCount "92"]
[EventDate "2023.07.11"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 0-0 5. Nf3 c5 6. dxc5 Na6 7. Bf4 Nxc5 8. 0-0-0 Qa5 9. Bd6 Rd8 10. e3 Bxc3 11. Qxc3 Qxc3+ 12. bxc3 Nce4 13. Be7 Re8 14. Bxf6 gxf6 15. Rd4 Nxf2 16. Rg1 e5 17. Rh4 d6 18. g4 b6 19. Rg3 Bb7 20. Nd2 Kg7 21. Kc2 Ne4 22. Nxe4 Bxe4+ 23. Bd3 Bxd3+ 24. Kxd3 a6 25. Rgh3 Rh8 26. Kc2 b5 27. cxb5 axb5 28. Kb3 Ra4 29. Kb2 h6 30. Kb3 d5 31. g5 fxg5 32. Rxa4 bxa4+ 33. Kxa4 Ra8+ 34. Kb3 f5 35. Rf3 Kf6 36. a4 e4 37. Rf2 Ke5 38. Ra2 f4 39. exf4+ gxf4 40. Kc2 f3 41. Kd2 Kf4 42. a5 e3+ 43. Kd3 e2 44. Kd2 Re8 45. Ra4+ Kf5 46. Ke1 f2+ 0-1

[Event "Warsaw Najdorf Memorial op-B"]
[Site "Warsaw"]
[Date "2023.07.13"]
[Round "3"]
[White "Pires, Emanuel Joao Robart"]
[Black "Mazurek, Jerzy"]
[Result "0-1"]
[ECO "B52"]
[WhiteElo "1994"]
[BlackElo "1738"]
[PlyCount "172"]
[EventDate "2023.07.11"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Nxd7 5. d4 cxd4 6. Qxd4 Ngf6 7. Nc3 g6 8. Bg5 Bg7 9. 0-0-0 0-0 10. Kb1 Qa5 11. Qd2 Qb6 12. Nd4 Rfc8 13. f3 Rc4 14. Be3 Rac8 15. Ne6 Nxe4 16. fxe4 Bxc3 17. Qxc3 Rxc3 18. Bxb6 R3c6 19. Bd8 fxe6 20. Bxe7 Rxc2 21. Rxd6 Nb6 22. Rd8+ Rxd8 23. Kxc2 Rd4 24. Re1 Nd7 25. b4 Kf7 26. Kc3 e5 27. Bh4 a6 28. Bf2 Rd6 29. a4 b5 30. axb5 axb5 31. Ra1 Nf6 32. Re1 Ke6 33. h3 Rd7 34. g4 g5 35. Bc5 Rd8 36. Kc2 Rd7 37. Re2 Rd8 38. Kc3 Rd7 39. Re1 Rd8 40. Bf2 Rd6 41. Kc2 Rd8 42. Be3 h6 43. Ra1 Nxe4 44. Ra6+ Rd6 45. Ra5 Rd5 46. Ra8 Kf7 47. Rh8 Kg7 48. Rb8 Nd6 49. Bc5 Nc4 50. Kc3 Na3 51. Bf8+ Kf7 52. Bc5 e4 53. Rb7+ Kg8 54. Rb8+ Kf7 55. Rb7+ Kg8 56. Rb8+ Kf7 57. Rb7+ Kf6 58. Rb6+ Ke5 59. Rxh6 Rd3+ 60. Kb2 e3 61. Rh8 Nc4+ 62. Kc2 Rd2+ 63. Kc3 Ke4 64. Re8+ Ne5 65. Ba7 Rd3+ 66. Kc2 e2 67. Bf2 Rd5 68. Bg3 Kf3 69. Be1 Kg2 70. Bc3 Kf1 71. Rf8+ Kg2 72. Rf5 Kxh3 73. Rxg5 Kg2 74. Rf5 Nxg4 75. Rxd5 Ne3+ 76. Kd2 Kf2 77. Kd3 Nxd5 78. Bd2 Kf1 79. Kd4 Nf6 80. Ke5 Ng4+ 81. Kd5 Nf6+ 82. Ke5 e1Q+ 83. Bxe1 Kxe1 84. Kd6 Ne4+ 85. Kd5 Nc3+ 86. Kd4 Kd2 0-1

[Event "Warsaw Najdorf Memorial op-B"]
[Site "Warsaw"]
[Date "2023.07.11"]
[Round "1"]
[White "Mazurek, Jerzy"]
[Black "Kitewski, Bartosz"]
[Result "0-1"]
[ECO "B80"]
[WhiteElo "1738"]
[BlackElo "1971"]
[PlyCount "120"]
[EventDate "2023.07.11"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f3 e6 7. Be3 Be7 8. Qd2 h5 9. Be2 Nc6 10. 0-0-0 Qc7 11. h3 h4 12. f4 b5 13. Nxc6 Qxc6 14. Bf3 e5 15. Nd5 Be6 16. Kb1 a5 17. Qd3 b4 18. Rc1 Rb8 19. Rhd1 exf4 20. Nxe7 Kxe7 21. Bxf4 Rhd8 22. e5 dxe5 23. Bxc6 Rxd3 24. Rxd3 exf4 25. Re1 Kf8 26. Rd4 Rc8 27. Ba4 Rc4 28. Rxc4 Bxc4 29. Bb3 Bb5 30. c3 Bc6 31. Re2 Ne4 32. cxb4 axb4 33. Kc2 Ng3 34. Rf2 g5 35. Kd3 Bb5+ 36. Kd4 Ke7 37. Bd5 Kd6 38. Bf3 Nf5+ 39. Ke4 Ne3 40. a3 bxa3 41. bxa3 f6 42. Kd4 Ba4 43. Rb2 Bd7 44. Rb6+ Ke7 45. Kc5 f5 46. Rb2 g4 47. Bc6 Bxc6 48. Kxc6 Nxg2 49. a4 f3 50. a5 g3 51. a6 f2 52. Rb1 Ne1 53. Rb7+ Ke6 54. a7 f1Q 55. a8Q Qc4+ 56. Kb6 Qb4+ 57. Ka7 Qa5+ 58. Kb8 Qxa8+ 59. Kxa8 g2 60. Rg7 f4 0-1

[Event "Warsaw YMCA Winter-A 271st"]
[Site "Warsaw"]
[Date "2023.03.21"]
[Round "11"]
[White "Pettersson, Alexander"]
[Black "Mazurek, Jerzy"]
[Result "1/2-1/2"]
[ECO "E70"]
[WhiteElo "1878"]
[BlackElo "1715"]
[PlyCount "55"]
[EventDate "2023.01.13"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Bd3 0-0 6. Nge2 Nc6 7. 0-0 e5 8. d5 Nd4 9. Bc2 c5 10. dxc6 bxc6 11. Nxd4 exd4 12. Qxd4 Ng4 13. Qd1 Qh4 14. Bf4 Ne5 15. Bg3 Qh6 16. Qxd6 Nxc4 17. Qxc6 Be6 18. Nd5 Bxd5 19. Qxd5 Nd2 20. Rfe1 Bxb2 21. Rad1 Bc3 22. Re3 Rfd8 23. Bd6 Rac8 24. Rxd2 Bxd2 25. Qxd2 Rxd6 26. Qxd6 Rxc2 27. Qb8+ Qf8 28. Qxf8+ 1/2-1/2

[Event "Warsaw YMCA Winter-A 271st"]
[Site "Warsaw"]
[Date "2023.03.17"]
[Round "10"]
[White "Mazurek, Jerzy"]
[Black "Sternik, Piotr"]
[Result "1/2-1/2"]
[ECO "B39"]
[WhiteElo "1715"]
[BlackElo "1793"]
[PlyCount "73"]
[EventDate "2023.01.13"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Bg7 5. c4 Nc6 6. Be3 Nf6 7. Nc3 Ng4 8. Qxg4 Bxd4 9. Bxd4 Nxd4 10. Qd1 Nc6 11. Qd2 0-0 12. h4 h5 13. g4 Qa5 14. gxh5 Qxh5 15. Be2 Qe5 16. 0-0-0 d6 17. f4 Qg7 18. h5 Bd7 19. Rhg1 Rac8 20. Kb1 Rfd8 21. hxg6 fxg6 22. Bh5 Be8 23. Rg5 e6 24. f5 Ne5 25. Bxg6 Bxg6 26. Qg2 exf5 27. exf5 Bxf5+ 28. Ka1 Bg6 29. Rf1 Rf8 30. Qd5+ Rf7 31. Ne4 Rc6 32. Nf6+ Kf8 33. Qe6 Re7 34. Nh5+ Rf7 35. Nf6 Re7 36. Nh5+ Rf7 37. Nf6 1/2-1/2

[Event "Warsaw YMCA Winter-A 271st"]
[Site "Warsaw"]
[Date "2023.03.09"]
[Round "9"]
[White "Safanowski, Tomasz"]
[Black "Mazurek, Jerzy"]
[Result "1/2-1/2"]
[ECO "D04"]
[WhiteElo "1704"]
[BlackElo "1715"]
[PlyCount "23"]
[EventDate "2023.01.13"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. Nf3 Nf6 2. d4 d5 3. e3 c5 4. Bd3 Nc6 5. b3 cxd4 6. exd4 Bg4 7. Bb2 Qa5+ 8. Bc3 Qb6 9. 0-0 e6 10. a3 Bd6 11. Nbd2 0-0 12. Bb2 1/2-1/2

[Event "Warsaw YMCA Winter-A 271st"]
[Site "Warsaw"]
[Date "2023.02.28"]
[Round "8"]
[White "Mazurek, Jerzy"]
[Black "Rylski, Tadeusz"]
[Result "1/2-1/2"]
[ECO "C92"]
[WhiteElo "1715"]
[BlackElo "1800"]
[PlyCount "89"]
[EventDate "2023.01.13"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 d6 8. c3 0-0 9. h3 Bb7 10. d4 Re8 11. Ng5 Rf8 12. Nf3 Re8 13. Nbd2 Bf8 14. a3 Nb8 15. Bc2 Nbd7 16. b3 g6 17. Bb2 Bg7 18. Bd3 Nh5 19. Qc2 c5 20. d5 Nf4 21. Bf1 f5 22. c4 bxc4 23. bxc4 Qf6 24. Qa4 Re7 25. Rab1 Rf7 26. Bc3 Rb8 27. Ba5 Nf8 28. Bb6 Bc8 29. Bd8 Qxd8 30. Rxb8 fxe4 31. Rxe4 Qc7 32. Rb2 Bf5 33. Ng5 Bxe4 34. Nxf7 Bxg2 35. Bxg2 e4 36. Qc6 Qxf7 37. Rb7 Qf5 38. Qe8 Be5 39. Rb8 e3 40. fxe3 Ne2+ 41. Kh1 Ng3+ 42. Kg1 Ne2+ 43. Kh1 Ng3+ 44. Kg1 Ne2+ 45. Kh1 1/2-1/2

[Event "Warsaw YMCA Winter-A 271st"]
[Site "Warsaw"]
[Date "2023.02.24"]
[Round "7"]
[White "Polak, Michal"]
[Black "Mazurek, Jerzy"]
[Result "0-1"]
[ECO "A49"]
[WhiteElo "1929"]
[BlackElo "1715"]
[PlyCount "76"]
[EventDate "2023.01.13"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 0-0 5. 0-0 d6 6. b3 c5 7. Bb2 Nfd7 8. Qc1 Nc6 9. d5 Bxb2 10. Qxb2 Nce5 11. Nxe5 Nxe5 12. c4 g5 13. Qd2 f6 14. Nc3 Bd7 15. Rae1 a6 16. f4 gxf4 17. gxf4 Ng6 18. Rf3 Kh8 19. Bh3 Rg8 20. Bxd7 Nh4+ 21. Rg3 Qxd7 22. Kf2 Rxg3 23. hxg3 Qh3 24. Rf1 Rg8 25. Ne4 Qg2+ 26. Ke1 Nf5 27. Qd3 Nxg3 28. Rf3 Nxe4 29. Qxe4 Qh1+ 30. Kd2 Rg7 31. Qe6 Qb1 32. Qc8+ Rg8 33. Qxb7 Qxa2+ 34. Ke3 Qb2 35. Kd3 Rg2 36. Qxe7 Qxb3+ 37. Kd2 Qb2+ 38. Ke1 Qc1# 0-1

[Event "Warsaw YMCA Winter-A 271st"]
[Site "Warsaw"]
[Date "2023.02.09"]
[Round "6"]
[White "Mazurek, Jerzy"]
[Black "Terkiewicz, Bruno"]
[Result "0-1"]
[ECO "A29"]
[WhiteElo "1715"]
[BlackElo "1769"]
[PlyCount "86"]
[EventDate "2023.01.13"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nc3 Nb6 6. Nf3 Nc6 7. 0-0 Be7 8. d3 0-0 9. a3 Re8 10. b4 Bf8 11. Bb2 a5 12. b5 Nd4 13. e3 Nxf3+ 14. Bxf3 a4 15. Rc1 Ra7 16. Qc2 Bh3 17. Rfe1 Qd7 18. Ne2 Qxb5 19. d4 Nd7 20. Be4 h6 21. dxe5 Nxe5 22. Nd4 Qb6 23. f4 Nc4 24. Bh7+ Kh8 25. Qxc4 Kxh7 26. Rc2 Re7 27. Qd3+ Kg8 28. Rec1 Ra8 29. Qc3 Rae8 30. Re2 c6 31. Ba1 Re4 32. Rce1 Qd8 33. Rb2 Qe7 34. Nc2 Be6 35. Rb4 Bb3 36. Rxe4 Qxe4 37. Nb4 c5 38. Nd3 Bd5 39. Re2 Qh1+ 40. Kf2 Bf3 41. Rc2 Qg2+ 42. Ke1 Qg1+ 43. Kd2 Qxe3# 0-1

[Event "Warsaw YMCA Winter-A 271st"]
[Site "Warsaw"]
[Date "2023.02.03"]
[Round "4"]
[White "Mazurek, Jerzy"]
[Black "Tsiapko, Andrii"]
[Result "1-0"]
[ECO "D35"]
[WhiteElo "1715"]
[BlackElo "1651"]
[PlyCount "57"]
[EventDate "2023.01.13"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 Be7 6. e3 c6 7. Bd3 Nbd7 8. Nge2 Nh5 9. Bxe7 Qxe7 10. Qd2 Nb6 11. 0-0 0-0 12. Rae1 Re8 13. Nc1 Be6 14. b3 Rad8 15. Bb1 g6 16. f3 Ng7 17. e4 c5 18. e5 Bf5 19. Nd3 Bxd3 20. Bxd3 Ne6 21. dxc5 Qxc5+ 22. Kh1 d4 23. Ne4 Qxe5 24. f4 Qg7 25. f5 gxf5 26. Rxf5 Nd5 27. Ref1 Re7 28. Rxd5 Rxd5 29. Nf6+ 1-0

[Event "Warsaw YMCA Winter-A 271st"]
[Site "Warsaw"]
[Date "2023.02.02"]
[Round "2"]
[White "Choroszej, Aleksander"]
[Black "Mazurek, Jerzy"]
[Result "1-0"]
[ECO "E76"]
[WhiteElo "2036"]
[BlackElo "1715"]
[PlyCount "51"]
[EventDate "2023.01.13"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 0-0 6. Nf3 e5 7. fxe5 dxe5 8. d5 c6 9. Bd3 b5 10. Qe2 bxc4 11. Bxc4 cxd5 12. Nxd5 Nc6 13. 0-0 Bg4 14. Bg5 Qd6 15. Qe3 Nxd5 16. Bxd5 Be6 17. Rad1 Rab8 18. b3 Nd4 19. Bxe6 Qxe6 20. Bh6 Nxf3+ 21. Rxf3 Bxh6 22. Qxh6 Qb6+ 23. Kh1 Rbd8 24. Rdf1 Rd4 25. Rh3 Qf6 26. Qxh7# 1-0

[Event "Warsaw YMCA Winter-A 271st"]
[Site "Warsaw"]
[Date "2023.01.20"]
[Round "5"]
[White "Szymkiewicz, Witold"]
[Black "Mazurek, Jerzy"]
[Result "0-1"]
[ECO "E73"]
[WhiteElo "1697"]
[BlackElo "1715"]
[PlyCount "94"]
[EventDate "2023.01.13"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Bg5 h6 6. Bf4 0-0 7. Be2 Na6 8. Qd2 Kh7 9. h4 c6 10. 0-0-0 Nc7 11. Nh3 Bxh3 12. Rxh3 Ne6 13. Be3 c5 14. d5 Nd4 15. g4 Qa5 16. Kb1 b5 17. cxb5 a6 18. b6 Nb5 19. Nxb5 Qxd2 20. Rxd2 axb5 21. f3 b4 22. h5 g5 23. e5 Nd7 24. exd6 exd6 25. f4 Bf6 26. Bd3+ Kg7 27. fxg5 Bxg5 28. Bxg5 hxg5 29. b7 Ra7 30. Bf5 Rxb7 31. Bxd7 Rxd7 32. Re2 f5 33. gxf5 Rxf5 34. Re6 Rxd5 35. Rf3 Kh7 36. Rff6 Rg7 37. Rh6+ Kg8 38. a4 bxa3 39. bxa3 g4 40. Rxd6 Rxd6 41. Rxd6 g3 42. Rd1 Kh7 43. Kc2 Kh6 44. Kc3 Rg4 45. Rh1 g2 46. Rg1 Kxh5 47. a4 Kh4 0-1

[Event "Warsaw YMCA Winter-A 271st"]
[Site "Warsaw"]
[Date "2023.01.13"]
[Round "1"]
[White "Mazurek, Jerzy"]
[Black "Kasperkiewicz, Pawel"]
[Result "1/2-1/2"]
[ECO "A10"]
[WhiteElo "1715"]
[BlackElo "1894"]
[PlyCount "141"]
[EventDate "2023.01.13"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. c4 b6 2. Nc3 Bb7 3. e4 e6 4. Nge2 Nf6 5. d3 c5 6. g3 d5 7. exd5 exd5 8. Bg2 Qd7 9. Nf4 d4 10. Qe2+ Be7 11. Ncd5 Nxd5 12. Nxd5 Nc6 13. 0-0 0-0 14. Nxe7+ Nxe7 15. Bxb7 Qxb7 16. Re1 Ng6 17. Bd2 f6 18. Qe6+ Rf7 19. f4 f5 20. Kf2 Nf8 21. Qe2 Nd7 22. Qf3 Nf6 23. h3 h5 24. Re5 g6 25. b4 Rc8 26. Qxb7 Rxb7 27. Rb1 Rd7 28. Bc1 b5 29. Rxc5 Rxc5 30. bxc5 bxc4 31. c6 Rc7 32. Rb8+ Kf7 33. Rb7 Ne8 34. dxc4 Ke7 35. c5 Ke6 36. Ba3 Kd5 37. Ke2 Kxc6 38. Rxc7+ Nxc7 39. Kd3 Nb5 40. Bb4 Kd5 41. c6 Kxc6 42. Kc4 d3 43. Kxd3 Kd5 44. Bf8 Nd4 45. Be7 Ne6 46. Bf6 Nc5+ 47. Ke3 Ne4 48. Bh4 Nc3 49. a3 Kc4 50. Kf3 Kd3 51. Be7 Nb5 52. g4 hxg4+ 53. hxg4 Nd4+ 54. Kg2 Ke4 55. gxf5 gxf5 56. Bc5 a6 57. a4 Ne6 58. Bd6 Nxf4+ 59. Kf2 Nd5 60. a5 f4 61. Bc5 Nf6 62. Bb6 Ng4+ 63. Ke2 Ne5 64. Kf2 Nd3+ 65. Ke2 f3+ 66. Kf1 Kd5 67. Bd8 Kd4 68. Bb6+ Ke4 69. Ba7 Nb2 70. Bb6 Nc4 71. Kf2 1/2-1/2

[Event "Warsaw YMCA Autumn-A 266th"]
[Site "Warsaw"]
[Date "2022.09.30"]
[Round "11"]
[White "Leszczewicz, Karol"]
[Black "Mazurek, Jerzy"]
[Result "1/2-1/2"]
[ECO "D36"]
[WhiteElo "1588"]
[BlackElo "1726"]
[PlyCount "74"]
[EventDate "2022.09.30"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 c6 6. e3 h6 7. Bh4 Be7 8. Bd3 0-0 9. Qc2 Re8 10. Nf3 Ne4 11. Bxe7 Qxe7 12. 0-0 Bf5 13. Nd2 Nxd2 14. Qxd2 Bxd3 15. Qxd3 Nd7 16. a3 Nb6 17. b4 a6 18. Rfb1 Rec8 19. Qc2 Nc4 20. Na4 b5 21. Nb2 a5 22. Nxc4 dxc4 23. Qc3 axb4 24. axb4 Qb7 25. Rxa8 Rxa8 26. Ra1 Ra6 27. g3 Qa8 28. Ra5 Rxa5 29. bxa5 Qa7 30. Qb4 f6 31. Kf1 Kf7 32. Ke2 Ke6 33. f3 g5 34. g4 Qa6 35. Kf2 Qa7 36. Kg2 Qa6 37. Kf2 Qa7 1/2-1/2

[Event "Warsaw YMCA Autumn-A 266th"]
[Site "Warsaw"]
[Date "2022.09.30"]
[Round "5"]
[White "Matyszkiewicz, Wiktor"]
[Black "Mazurek, Jerzy"]
[Result "1-0"]
[ECO "B33"]
[WhiteElo "1793"]
[BlackElo "1726"]
[PlyCount "77"]
[EventDate "2022.09.30"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Bxf6 gxf6 10. Nd5 Bg7 11. c3 f5 12. Bd3 Ne7 13. Nxe7 Qxe7 14. Qh5 d5 15. exd5 e4 16. 0-0 0-0 17. Bc2 b4 18. Nc4 Qc5 19. Ne3 bxc3 20. bxc3 Qxc3 21. Rac1 Qf6 22. Ba4 Ra7 23. Rc6 Qe5 24. Nc4 Qf4 25. g3 Qg4 26. Qxg4 fxg4 27. d6 Be6 28. Nb6 Bd4 29. Rd1 Bxb6 30. Rxb6 Rd8 31. a3 f5 32. Kf1 Bc4+ 33. Ke1 Kf7 34. Kd2 Bb5 35. Bb3+ Kf6 36. Ke3 Bd7 37. Rc1 Rc8 38. Rxc8 Bxc8 39. d7+ 1-0

[Event "Warsaw YMCA Autumn-A 266th"]
[Site "Warsaw"]
[Date "2022.09.30"]
[Round "4"]
[White "Mazurek, Jerzy"]
[Black "Milczarek, Robert"]
[Result "1/2-1/2"]
[ECO "A52"]
[WhiteElo "1726"]
[BlackElo "1584"]
[PlyCount "58"]
[EventDate "2022.09.30"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. Bf4 Nc6 5. Nf3 Bb4+ 6. Nc3 Bxc3+ 7. bxc3 Qe7 8. Qd5 f6 9. exf6 Nxf6 10. Qd2 d6 11. e3 0-0 12. Bd3 Bg4 13. Nd4 Ne5 14. 0-0 Nh5 15. Bxe5 dxe5 16. Be2 Nf6 17. Bxg4 Nxg4 18. Nb3 Rad8 19. Qc2 e4 20. Rad1 Qh4 21. h3 Ne5 22. Rxd8 Rxd8 23. Nd2 Nd3 24. f3 exf3 25. Nxf3 Qe4 26. Rd1 Qxe3+ 27. Kh2 Qf4+ 28. Kg1 Qe3+ 29. Kh2 Qf4+ 1/2-1/2

[Event "Warsaw YMCA Autumn-A 266th"]
[Site "Warsaw"]
[Date "2022.09.30"]
[Round "2"]
[White "Mazurek, Jerzy"]
[Black "Nocek, Dominik"]
[Result "1/2-1/2"]
[ECO "C88"]
[WhiteElo "1726"]
[BlackElo "1627"]
[PlyCount "91"]
[EventDate "2022.09.30"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 0-0 8. a4 Bb7 9. d3 d6 10. Nbd2 Nd7 11. axb5 axb5 12. Rxa8 Qxa8 13. c3 Nc5 14. Bc2 Qa1 15. Nb3 Nxb3 16. Bxb3 Na5 17. Qc2 Nxb3 18. Bg5 Qa2 19. Bxe7 Re8 20. Bg5 Nc5 21. Nd2 Na4 22. Rb1 d5 23. f3 c5 24. exd5 Bxd5 25. c4 bxc4 26. Nxc4 Bxc4 27. dxc4 Rb8 28. Bd2 h6 29. h3 Qb3 30. Qe4 Rd8 31. Be1 f6 32. f4 exf4 33. Qxf4 Rd1 34. Rxd1 Qxd1 35. Qe4 f5 36. Qe6+ Kh8 37. Qc8+ Kh7 38. Qxf5+ Kh8 39. Qf8+ Kh7 40. Qf5+ Kh8 41. Qe5 Nxb2 42. Qe8+ Kh7 43. Qe4+ Kh8 44. Qe8+ Kh7 45. Qe4+ Kh8 46. Qe8+ 1/2-1/2

[Event "Warsaw YMCA Autumn-A 266th"]
[Site "Warsaw"]
[Date "2022.09.30"]
[Round "8"]
[White "Mazurek, Jerzy"]
[Black "Pettersson, Alexander"]
[Result "1-0"]
[ECO "D35"]
[WhiteElo "1726"]
[BlackElo "1849"]
[PlyCount "75"]
[EventDate "2022.09.30"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 c6 6. e3 h6 7. Bh4 Be7 8. Bd3 0-0 9. Nge2 Re8 10. 0-0 Nh5 11. Bxe7 Qxe7 12. Qd2 Nd7 13. Rae1 Nf8 14. Nc1 f5 15. Bb1 Be6 16. Nd3 Nd7 17. b4 Nhf6 18. f3 Bf7 19. Nc5 Nxc5 20. bxc5 Qd7 21. Na4 Bg6 22. Nb2 Qe6 23. Nd3 Nd7 24. Nf4 Qf6 25. Nxg6 Qxg6 26. g4 Qg5 27. Bxf5 Nf6 28. Qf2 Nh7 29. f4 Qe7 30. Qc2 Nf6 31. Rf3 Qc7 32. g5 hxg5 33. fxg5 Ne4 34. Rh3 Re7 35. Bh7+ Kf8 36. Bg6 Kg8 37. Qg2 Rf8 38. Rh8+ 1-0

[Event "Warsaw YMCA Autumn-A 266th"]
[Site "Warsaw"]
[Date "2022.09.30"]
[Round "10"]
[White "Mazurek, Jerzy"]
[Black "Szukalski, Antoni"]
[Result "1-0"]
[ECO "D35"]
[WhiteElo "1726"]
[BlackElo "1702"]
[PlyCount "123"]
[EventDate "2022.09.30"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 e6 3. d4 d5 4. cxd5 exd5 5. Bg5 Be7 6. e3 c6 7. Bd3 Nbd7 8. Nge2 Ne4 9. Bxe7 Qxe7 10. Bxe4 dxe4 11. Ng3 Nf6 12. Qc2 0-0 13. Ngxe4 Re8 14. Ng3 Bg4 15. h3 Be6 16. 0-0 Rad8 17. Na4 Bc8 18. Rfe1 g6 19. Rad1 h5 20. e4 h4 21. Nf1 Nh5 22. Qc5 Qf6 23. Nc3 b6 24. Qc4 Qg5 25. e5 Nf4 26. Ne3 Bxh3 27. Ne4 Be6 28. Nxg5 Bxc4 29. Nxc4 Ne6 30. Nxe6 Rxe6 31. f4 f6 32. Nd6 a6 33. Ne4 fxe5 34. dxe5 Rf8 35. Nf6+ Kg7 36. Rd7+ Rf7 37. Rxf7+ Kxf7 38. Kf2 c5 39. Kf3 c4 40. Ke4 b5 41. Rd1 Rc6 42. Rd7+ Ke6 43. Rd8 b4 44. Rd2 c3 45. bxc3 bxc3 46. Rc2 Rc4+ 47. Ke3 Kf5 48. Nd5 g5 49. fxg5 Re4+ 50. Kd3 Rxe5 51. Nxc3 Kxg5 52. Ne4+ Kg4 53. Ke3 Ra5 54. Kf2 Ra4 55. Nd2 Rf4+ 56. Kg1 Rf6 57. Rc4+ Kh5 58. Ra4 Rg6 59. Kh2 Rd6 60. Nf3 a5 61. Rxa5+ Kg4 62. Ra4+ 1-0

[Event "Warsaw YMCA Autumn-A 266th"]
[Site "Warsaw"]
[Date "2022.09.30"]
[Round "12"]
[White "Mazurek, Jerzy"]
[Black "Terkiewicz, Bruno"]
[Result "0-1"]
[ECO "A22"]
[WhiteElo "1726"]
[BlackElo "1846"]
[PlyCount "74"]
[EventDate "2022.09.30"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nf6 3. g3 Bb4 4. Bg2 0-0 5. e4 d6 6. Nge2 Be6 7. b3 c6 8. 0-0 d5 9. exd5 cxd5 10. d3 Nc6 11. Bg5 dxc4 12. bxc4 Bxc3 13. Nxc3 h6 14. Bxf6 Qxf6 15. Rb1 Rab8 16. Qa4 Bf5 17. Nd5 Qd6 18. Rbd1 Rfd8 19. f4 Rd7 20. Kh1 Bg4 21. Rde1 Rbd8 22. Ne3 Bh5 23. Nd5 f6 24. Bh3 Rf7 25. g4 Bg6 26. f5 Bh7 27. Bg2 Kh8 28. Qc2 Bg8 29. Qf2 Rfd7 30. Be4 b5 31. Ne3 Nb4 32. Rd1 Qa6 33. cxb5 Qxb5 34. g5 hxg5 35. h4 g4 36. Nxg4 Nxd3 37. Qe2 Nf2+ 0-1

[Event "Warsaw YMCA Autumn-A 266th"]
[Site "Warsaw"]
[Date "2022.09.30"]
[Round "3"]
[White "Moskwinski, Marek"]
[Black "Mazurek, Jerzy"]
[Result "1/2-1/2"]
[ECO "B33"]
[WhiteElo "1858"]
[BlackElo "1726"]
[PlyCount "98"]
[EventDate "2022.09.30"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Nd5 Be7 10. Bxf6 Bxf6 11. c3 0-0 12. h4 g6 13. h5 Bg7 14. Nc2 Ne7 15. Nce3 Nxd5 16. Qxd5 Be6 17. Qd2 Qb6 18. 0-0-0 Bxa2 19. Qxd6 Qa5 20. Qa3 Qxa3 21. bxa3 Bh6 22. Be2 Bxe3+ 23. fxe3 Rfd8 24. Kb2 Be6 25. Rxd8+ Rxd8 26. Rd1 Rxd1 27. Bxd1 h6 28. a4 Kf8 29. axb5 axb5 30. Be2 Bd7 31. Kb3 Bc6 32. Bd3 Ke7 33. Kb4 Kd6 34. g4 g5 35. Bxb5 Bxe4 36. Be2 Bg2 37. c4 f6 38. Kb5 e4 39. Kb6 Bf3 40. c5+ Kd5 41. Bxf3 exf3 42. c6 f2 43. c7 f1Q 44. c8Q Qb1+ 45. Ka5 Qa2+ 46. Kb4 Qb2+ 47. Ka4 Qa2+ 48. Kb4 Qb2+ 49. Ka4 Qa2+ 1/2-1/2

[Event "Warsaw YMCA Autumn-A 266th"]
[Site "Warsaw"]
[Date "2022.09.30"]
[Round "1"]
[White "Safanowski, Tomasz"]
[Black "Mazurek, Jerzy"]
[Result "1/2-1/2"]
[ECO "A03"]
[WhiteElo "1708"]
[BlackElo "1726"]
[PlyCount "37"]
[EventDate "2022.09.30"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. f4 c5 2. Nf3 Nc6 3. b3 g6 4. Bb2 Nf6 5. e3 Bg7 6. Be2 0-0 7. 0-0 d5 8. Ne5 Nxe5 9. Bxe5 Bd7 10. d3 Bc6 11. Nd2 Ne8 12. Bxg7 Nxg7 13. Bf3 e5 14. fxe5 Qg5 15. e4 Qxe5 16. exd5 Bxd5 17. Bxd5 Qxd5 18. Qf3 Qxf3 19. Rxf3 1/2-1/2

[Event "Warsaw YMCA Autumn-A 266th"]
[Site "Warsaw"]
[Date "2022.09.30"]
[Round "9"]
[White "Terkiewicz, Bruno"]
[Black "Mazurek, Jerzy"]
[Result "1-0"]
[ECO "E62"]
[WhiteElo "1846"]
[BlackElo "1726"]
[PlyCount "103"]
[EventDate "2022.09.30"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 0-0 5. Bg2 d6 6. 0-0 Nc6 7. Nc3 e5 8. dxe5 Nxe5 9. Qa4 Nxf3+ 10. Bxf3 Nd7 11. Rd1 a6 12. Be3 Ne5 13. Bg2 Bd7 14. Qb3 Bc6 15. c5 Ng4 16. Bd4 Bxg2 17. Kxg2 Qd7 18. cxd6 cxd6 19. Nd5 Qe6 20. Nb6 Bxd4 21. Qxe6 fxe6 22. Rxd4 Rxf2+ 23. Kg1 Raf8 24. Rxg4 Rxe2 25. Rf4 Rxf4 26. gxf4 Rxb2 27. Nc4 Rb4 28. Nxd6 Rxf4 29. Nxb7 Rc4 30. Rf1 Kg7 31. Nd6 Ra4 32. Rf2 g5 33. Re2 Kg6 34. Rxe6+ Kh5 35. Re2 g4 36. Kg2 Kg5 37. Ne4+ Kf4 38. Nc5 Ra3 39. Re4+ Kf5 40. Ra4 Rc3 41. Ne4 Rc2+ 42. Nf2 h5 43. Rxa6 h4 44. Ra4 g3 45. hxg3 hxg3 46. Kxg3 Rc3+ 47. Kg2 Ke5 48. Kf1 Kd5 49. Nd1 Rc6 50. Ne3+ Kd6 51. Ke2 Kc5 52. Rc4+ 1-0

[Event "Warsaw Szansa op"]
[Site "Warsaw"]
[Date "2022.09.17"]
[Round "1"]
[White "Psyk, Radoslaw"]
[Black "Mazurek, Jerzy"]
[Result "0-1"]
[ECO "E60"]
[WhiteElo "2404"]
[BlackElo "1726"]
[PlyCount "20"]
[EventDate "2022.09.17"]
[EventType "swiss (rapid)"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. Nf3 c5 2. e3 g6 3. c4 Bg7 4. d4 Nf6 5. Nbd2 cxd4 6. Nxd4 0-0 7. Be2 d5 8. 0-0 e5 9. N4f3 Nc6 10. cxd5 Nxd5 0-1

[Event "POL-chT 2nd League"]
[Site "Jastrzebia Gora"]
[Date "2022.09.08"]
[Round "6.112"]
[White "Mazurek, Jerzy"]
[Black "Wozniak, Grzegorz1"]
[Result "1-0"]
[ECO "A22"]
[WhiteElo "1726"]
[BlackElo "1579"]
[PlyCount "171"]
[EventDate "2022.09.03"]
[EventType "team-swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 210 Extra"]
[Source "ChessBase"]
[SourceDate "2022.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.11.30"]
[SourceQuality "1"]
[WhiteTeam "Skoczek Trojanski"]
[BlackTeam "Rzeszow RzKSz"]
[WhiteTeamCountry "POL"]
[BlackTeamCountry "POL"]

1. c4 Nf6 2. Nc3 e5 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nxc3 6. bxc3 c6 7. Nf3 Bd6 8. 0-0 0-0 9. d4 exd4 10. cxd4 Nd7 11. Qc2 Nf6 12. e4 Be7 13. Bb2 h6 14. Ne5 Be6 15. f4 Qa5 16. f5 Bd7 17. Nc4 Qc7 18. Ne3 Rac8 19. Rac1 Qa5 20. Bc3 Qc7 21. e5 Nh7 22. f6 gxf6 23. Be4 Ng5 24. exf6 Bd6 25. Bf5 Rce8 26. Ng4 Bxf5 27. Nxh6+ Kh8 28. Rxf5 Rg8 29. Nxg8 Rxg8 30. Qe2 Bxg3 31. hxg3 Qxg3+ 32. Kh1 Nh7 33. Rh5 Qf4 34. Rxh7+ Kxh7 35. Qh5+ Qh6 36. Qxh6+ Kxh6 37. Bd2+ Kh5 38. Bf4 Rg4 39. Be5 Re4 40. Rc2 Kg4 41. a4 Re1+ 42. Kg2 Kf5 43. a5 Ra1 44. Rb2 b5 45. axb6 axb6 46. Rxb6 c5 47. Rc6 cxd4 48. Bxd4 Rd1 49. Bb6 Rd5 50. Be3 Kg6 51. Kg3 Rf5 52. Bd4 Rd5 53. Bc3 Kg5 54. Bb4 Rd3+ 55. Kf2 Rb3 56. Be7 Kf4 57. Rc4+ Kf5 58. Ke2 Rh3 59. Kd2 Rb3 60. Kc2 Rh3 61. Rc3 Rh1 62. Kd3 Rd1+ 63. Kc4 Rd7 64. Rd3 Rc7+ 65. Kb5 Rc1 66. Rd6 Ke5 67. Kb6 Rc2 68. Rc6 Rd2 69. Kc7 Rd1 70. Kc8 Kf5 71. Bd8 Rd3 72. Rc7 Kg6 73. Be7 Rd1 74. Rd7 Ra1 75. Rd6 Ra7 76. Kd8 Ra8+ 77. Kd7 Kf5 78. Bd8 Ra1 79. Ke8 Kg6 80. Rd7 Re1+ 81. Kf8 Rh1 82. Rxf7 Rh8+ 83. Ke7 Rh1 84. Rg7+ Kf5 85. Kf7 Rh8 86. Be7 1-0

[Event "POL-chT 2nd League"]
[Site "Jastrzebia Gora"]
[Date "2022.09.07"]
[Round "5.119"]
[White "Kalkowski, Igor"]
[Black "Mazurek, Jerzy"]
[Result "1-0"]
[ECO "B30"]
[WhiteElo "1893"]
[BlackElo "1726"]
[PlyCount "51"]
[EventDate "2022.09.03"]
[EventType "team-swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 210 Extra"]
[Source "ChessBase"]
[SourceDate "2022.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.11.30"]
[SourceQuality "1"]
[WhiteTeam "Gornik Ledziny"]
[BlackTeam "Skoczek Trojanski"]
[WhiteTeamCountry "POL"]
[BlackTeamCountry "POL"]

1. e4 c5 2. Nf3 Nc6 3. b4 cxb4 4. d4 d5 5. exd5 Qxd5 6. c4 bxc3 7. Nxc3 Qa5 8. Bd2 e6 9. Rb1 Nf6 10. Bb5 Qc7 11. 0-0 Be7 12. Ne5 0-0 13. Bxc6 bxc6 14. Qa4 Bd7 15. Ne2 c5 16. Nxd7 Qxd7 17. Qxd7 Nxd7 18. Rb7 Rfd8 19. Ba5 cxd4 20. Bxd8 Rxd8 21. Nxd4 Bc5 22. Nc6 Rc8 23. Nxa7 Bxa7 24. Rxa7 Nb6 25. g3 Nd5 26. Rb1 1-0

[Event "Warsaw YMCA Summer-A 261st"]
[Site "Warsaw"]
[Date "2022.08.12"]
[Round "10"]
[White "Safanowski, Tomasz"]
[Black "Mazurek, Jerzy"]
[Result "0-1"]
[ECO "A02"]
[WhiteElo "1671"]
[BlackElo "1746"]
[PlyCount "106"]
[EventDate "2022.06.29"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. f4 c5 2. Nf3 g6 3. e3 Bg7 4. Be2 Nc6 5. d3 d6 6. 0-0 e6 7. c3 Nge7 8. Qc2 0-0 9. a4 e5 10. e4 exf4 11. Bxf4 d5 12. Na3 a6 13. Rad1 f6 14. h3 Be6 15. Kh1 Qb6 16. Rd2 Na5 17. d4 Nb3 18. a5 Nxa5 19. dxc5 Qb3 20. Bd6 Qxc2 21. Nxc2 Rfe8 22. Ncd4 Bf7 23. e5 Nec6 24. e6 Bxe6 25. b4 Nxd4 26. Nxd4 Nc4 27. Bxc4 dxc4 28. Nxe6 Rxe6 29. Rd4 f5 30. Rxc4 b5 31. Rd4 Bxd4 32. cxd4 Rxd6 33. cxd6 Rd8 34. Kg1 Rxd6 35. Rd1 Kf7 36. Kf2 Ke6 37. Ke3 Kd5 38. Kd3 Rc6 39. Re1 Rc4 40. Re5+ Kd6 41. Re8 Rxb4 42. Rd8+ Ke6 43. Re8+ Kf7 44. Ra8 Rb3+ 45. Kc2 Ra3 46. Ra7+ Ke6 47. Rxh7 Ra2+ 48. Kb3 Rxg2 49. Kb4 f4 50. Rb7 Rg5 51. h4 Rf5 52. Rb6+ Kf7 53. Rxa6 f3 0-1

[Event "Warsaw YMCA Summer-A 261st"]
[Site "Warsaw"]
[Date "2022.08.10"]
[Round "9"]
[White "Mazurek, Jerzy"]
[Black "Szewczak, Andrzej"]
[Result "1-0"]
[ECO "C64"]
[WhiteElo "1746"]
[BlackElo "1694"]
[PlyCount "89"]
[EventDate "2022.06.29"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. c3 Qf6 5. d4 exd4 6. e5 Qg6 7. 0-0 dxc3 8. Nxc3 Nge7 9. Bd3 Qh5 10. Qe2 d5 11. Nb5 Bb6 12. Nd6+ cxd6 13. exd6 Bg4 14. dxe7 Bc7 15. h3 Bxf3 16. Qxf3 Qxf3 17. gxf3 Bd6 18. Kg2 a6 19. a3 Nxe7 20. Re1 Kd7 21. b4 f6 22. Bd2 h5 23. a4 h4 24. a5 g5 25. b5 axb5 26. Bxb5+ Nc6 27. Bc3 Rhf8 28. Rad1 Kc7 29. Rxd5 Ne7 30. Rxe7+ Bxe7 31. Rd7+ Kb8 32. Rxe7 b6 33. axb6 Ra2 34. Re8+ Rxe8 35. Bxe8 Re2 36. Bg6 Re6 37. Bd4 Rd6 38. Be3 Rd1 39. Be4 Rd6 40. f4 Re6 41. Bf5 Rc6 42. fxg5 fxg5 43. Kf3 Rc4 44. Bxg5 Rb4 45. Be3 1-0

[Event "Warsaw YMCA Summer-A 261st"]
[Site "Warsaw"]
[Date "2022.08.05"]
[Round "8"]
[White "Pichurko, Jakub"]
[Black "Mazurek, Jerzy"]
[Result "0-1"]
[ECO "A48"]
[WhiteElo "1767"]
[BlackElo "1746"]
[PlyCount "68"]
[EventDate "2022.06.29"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. Bf4 Bg7 4. e3 0-0 5. Be2 d6 6. h3 c5 7. c3 b6 8. 0-0 Bb7 9. Nbd2 Nbd7 10. a4 a6 11. Bh2 Ra7 12. Re1 Re8 13. dxc5 bxc5 14. a5 Qa8 15. Nc4 Bc6 16. Nb6 Qb7 17. Nxd7 Nxd7 18. Qd2 Rb8 19. Ra2 Bd5 20. Raa1 Nf6 21. Red1 Qxb2 22. Rab1 Qxb1 23. Rxb1 Rxb1+ 24. Ne1 Rab7 25. Kf1 R7b2 26. Qd3 c4 27. Qd4 Bxg2+ 28. Kxg2 Rxe2 29. Nf3 Rbb2 30. Bg1 d5 31. Qf4 Ne4 32. Ng5 Rxf2+ 33. Bxf2 Rxf2+ 34. Qxf2 Nxf2 0-1

[Event "Warsaw YMCA Summer-A 261st"]
[Site "Warsaw"]
[Date "2022.08.03"]
[Round "7"]
[White "Moskwinski, Marek"]
[Black "Mazurek, Jerzy"]
[Result "1-0"]
[ECO "B57"]
[WhiteElo "1856"]
[BlackElo "1746"]
[PlyCount "87"]
[EventDate "2022.06.29"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bc4 Qb6 7. Nf3 e6 8. 0-0 Be7 9. Bb3 0-0 10. Be3 Qc7 11. h3 Na5 12. Qd2 Bd7 13. Nd4 a6 14. Rfd1 b5 15. a3 Nxb3 16. cxb3 Qb7 17. f3 Rfd8 18. Rac1 e5 19. Nde2 Be6 20. Nd5 Nxd5 21. exd5 Bd7 22. Qa5 Rdc8 23. Qb6 Qxb6 24. Bxb6 Bg5 25. Rc3 Rab8 26. Bc7 b4 27. axb4 Rxb4 28. Bxd6 Rxc3 29. bxc3 Rxb3 30. Bxe5 Be3+ 31. Kh2 a5 32. Bd6 Bb5 33. Nd4 Bxd4 34. cxd4 f6 35. Rc1 Be8 36. Rc8 Kf7 37. Rc7+ Kg6 38. Bf8 Bf7 39. d6 Rb8 40. Be7 Be8 41. d7 Bxd7 42. Rxd7 Ra8 43. Bc5 a4 44. Ra7 1-0

[Event "Warsaw YMCA Summer-A 261st"]
[Site "Warsaw"]
[Date "2022.07.29"]
[Round "6"]
[White "Mazurek, Jerzy"]
[Black "Pichurko, Jakub"]
[Result "1-0"]
[ECO "D96"]
[WhiteElo "1746"]
[BlackElo "1767"]
[PlyCount "67"]
[EventDate "2022.06.29"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. c4 c6 2. Nf3 d5 3. d4 Nf6 4. Qb3 g6 5. Nc3 Bg7 6. cxd5 cxd5 7. Bg5 e6 8. e3 0-0 9. Bd3 b6 10. h3 Bb7 11. 0-0 Nc6 12. Rfc1 Qd6 13. a3 Na5 14. Qd1 a6 15. Bf4 Qd8 16. Na4 Bc6 17. Ne5 Bxa4 18. Qxa4 b5 19. Qb4 Nh5 20. Bh2 Bxe5 21. Bxe5 Nc4 22. Bh2 Rc8 23. b3 Nb6 24. a4 bxa4 25. Rxc8 Nxc8 26. Rxa4 Nf6 27. Rxa6 Ne4 28. f3 Nf6 29. Qc5 Nd7 30. Qc7 Qe7 31. Bf4 Re8 32. Bb5 Rd8 33. Ra8 Qe8 34. Bg5 1-0

[Event "Warsaw YMCA Summer-A 261st"]
[Site "Warsaw"]
[Date "2022.07.26"]
[Round "5"]
[White "Polak, Michal"]
[Black "Mazurek, Jerzy"]
[Result "1-0"]
[ECO "B68"]
[WhiteElo "1945"]
[BlackElo "1746"]
[PlyCount "69"]
[EventDate "2022.06.29"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Qd2 a6 8. 0-0-0 Bd7 9. Kb1 Be7 10. f4 Nxd4 11. Qxd4 Bc6 12. e5 dxe5 13. Qxe5 Qb8 14. Qe1 0-0 15. Bd3 Re8 16. Qh4 h6 17. Rhe1 Bf8 18. Bxf6 gxf6 19. Qxf6 Bg7 20. Qh4 Qc7 21. Re3 Qe7 22. Qh5 Qf6 23. g4 Bb5 24. g5 Qxf4 25. Rf3 Qxg5 26. Qxf7+ Kh8 27. Nxb5 Rf8 28. Qxb7 Qe5 29. Rxf8+ Rxf8 30. Nc7 Rf7 31. Bg6 Qxc7 32. Qxc7 Rxc7 33. Rd8+ Bf8 34. Rxf8+ Kg7 35. Re8 1-0

[Event "Warsaw YMCA Summer-A 261st"]
[Site "Warsaw"]
[Date "2022.07.22"]
[Round "3"]
[White "Mazurek, Jerzy"]
[Black "Kasperkiewicz, Pawel"]
[Result "0-1"]
[ECO "C88"]
[WhiteElo "1746"]
[BlackElo "1881"]
[PlyCount "78"]
[EventDate "2022.06.29"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 0-0 8. a4 b4 9. d4 d6 10. dxe5 Nxe5 11. Nxe5 dxe5 12. Qe2 Bb7 13. Rd1 Bd6 14. f3 Nd7 15. a5 Qe7 16. Be3 Nc5 17. Bc4 Ne6 18. Bxe6 Qxe6 19. Nd2 Qe7 20. Qc4 Bc8 21. Nb3 Be6 22. Qe2 g6 23. Qf2 f5 24. exf5 gxf5 25. Bh6 Rf7 26. Qg3+ Kh8 27. Bg5 Qf8 28. Qh4 Qg7 29. Bh6 Qg6 30. Qg5 Rg8 31. Qxg6 Rxg6 32. Be3 f4 33. Bc5 Bh3 34. Bxd6 cxd6 35. Rd2 Rfg7 36. g3 fxg3 37. Rad1 gxh2+ 38. Kxh2 Rh6 39. Rxd6 Be6# 0-1

[Event "Warsaw YMCA Summer-A 261st"]
[Site "Warsaw"]
[Date "2022.07.13"]
[Round "4"]
[White "Mazurek, Jerzy"]
[Black "Pajak, Jakub Lech"]
[Result "0-1"]
[ECO "D61"]
[WhiteElo "1746"]
[BlackElo "1897"]
[PlyCount "106"]
[EventDate "2022.06.29"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. c4 c6 2. Nf3 d5 3. d4 e6 4. Qc2 Nf6 5. Bg5 Be7 6. e3 Nbd7 7. Nc3 h6 8. Bf4 0-0 9. h3 dxc4 10. Bxc4 Nb6 11. Bb3 Nbd5 12. Bh2 b6 13. 0-0 Nb4 14. Qb1 Bd6 15. Ne5 Qc7 16. a3 Nbd5 17. Rc1 Nxc3 18. Rxc3 Bb7 19. Bd1 Nd7 20. Nf3 Bxh2+ 21. Nxh2 Qd6 22. b4 e5 23. dxe5 Qxe5 24. Qc1 c5 25. Bf3 Bxf3 26. Nxf3 Qf6 27. Ra2 Qe6 28. Rac2 Rfd8 29. bxc5 Nxc5 30. Nd4 Qg6 31. Qf1 Rd5 32. Qe2 Re8 33. Qf3 Rd6 34. Qf5 Rxd4 35. Qf3 Rd3 36. Rc4 Rxa3 37. Rc1 Ra4 38. Rxa4 Nxa4 39. Ra1 b5 40. Qb7 Qb6 41. Qd7 Rd8 42. Qf5 Qf6 43. Qb1 Qb2 44. Qxb2 Nxb2 45. Rxa7 Rd1+ 46. Kh2 b4 47. Rb7 Nd3 48. Kg3 Rb1 49. Kf3 b3 50. Ke2 Nc5 51. Rb8+ Kh7 52. f3 Rb2+ 53. Kf1 Rc2 0-1

[Event "Warsaw Najdorf Memorial op-B"]
[Site "Warsaw"]
[Date "2022.07.12"]
[Round "4"]
[White "Sternik, Piotr"]
[Black "Mazurek, Jerzy"]
[Result "1/2-1/2"]
[ECO "D55"]
[WhiteElo "1434"]
[BlackElo "1752"]
[PlyCount "55"]
[EventDate "2022.07.09"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. Bg5 e6 3. Nf3 d5 4. c4 Be7 5. Nc3 h6 6. Bf4 0-0 7. e3 c5 8. dxc5 Bxc5 9. cxd5 Nxd5 10. Nxd5 exd5 11. Be2 Bb4+ 12. Nd2 Nc6 13. a3 Be7 14. 0-0 Bf5 15. Nf3 Bf6 16. Ra2 d4 17. Nxd4 Nxd4 18. exd4 Be6 19. b3 Qxd4 20. Qxd4 Bxd4 21. Rd2 Bb6 22. b4 Rad8 23. Rfd1 Rxd2 24. Rxd2 Rd8 25. Rxd8+ Bxd8 26. Bf3 b5 27. Be3 a5 28. Be2 1/2-1/2

[Event "Warsaw Najdorf Memorial op-B"]
[Site "Warsaw"]
[Date "2022.07.10"]
[Round "2"]
[White "Bubien, Antoni"]
[Black "Mazurek, Jerzy"]
[Result "1-0"]
[ECO "B31"]
[WhiteElo "1472"]
[BlackElo "1752"]
[PlyCount "77"]
[EventDate "2022.07.09"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. 0-0 Bg7 5. c3 e5 6. d4 cxd4 7. cxd4 exd4 8. Bf4 a6 9. Ba4 Nge7 10. Bd6 h6 11. Na3 0-0 12. e5 b5 13. Bb3 Qb6 14. Nc2 Re8 15. Ncxd4 Nxd4 16. Nxd4 Bb7 17. Qg4 Bd5 18. Bc2 h5 19. Qh4 Nc8 20. Bb4 Bxe5 21. Rad1 a5 22. Be1 Bc4 23. Nf3 Bf6 24. Qg3 Ne7 25. Rd6 h4 26. Rxb6 hxg3 27. Rxf6 gxh2+ 28. Nxh2 Bxf1 29. Kxf1 Nd5 30. Rd6 Rac8 31. Bb3 Rc1 32. Nf3 Nf4 33. Rxd7 Ne6 34. g3 a4 35. Bd5 Ng5 36. Nxg5 Rexe1+ 37. Kg2 Rc2 38. Bxf7+ Kh8 39. Bd5 1-0

[Event "Warsaw Najdorf Memorial op-B"]
[Site "Warsaw"]
[Date "2022.07.09"]
[Round "1"]
[White "Mazurek, Jerzy"]
[Black "Kochanek, Tomasz"]
[Result "1-0"]
[ECO "A36"]
[WhiteElo "1752"]
[BlackElo "1285"]
[PlyCount "41"]
[EventDate "2022.07.09"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 0-0 5. e4 d6 6. Nge2 c5 7. 0-0 e5 8. d3 Nc6 9. f4 Bg4 10. h3 Bd7 11. f5 a6 12. g4 Ne7 13. g5 gxf5 14. gxf6 Bxf6 15. exf5 Nxf5 16. Ne4 Kh8 17. N2g3 Nxg3 18. Nxf6 Nxf1 19. Qxf1 Qc8 20. Nxd7 Qxd7 21. Qf6+ 1-0

[Event "Warsaw YMCA Summer-A 261st"]
[Site "Warsaw"]
[Date "2022.07.07"]
[Round "2"]
[White "Szewczak, Andrzej"]
[Black "Mazurek, Jerzy"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "1694"]
[BlackElo "1746"]
[PlyCount "108"]
[EventDate "2022.06.29"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. b4 Nf6 2. Bb2 e6 3. a3 d5 4. e3 c5 5. bxc5 Bxc5 6. Nf3 0-0 7. Be2 Nbd7 8. 0-0 Nb6 9. a4 Bd7 10. a5 Na4 11. Bxf6 Qxf6 12. c3 b5 13. d4 Bd6 14. Qb3 a6 15. Nbd2 Rfc8 16. Rfc1 Bc7 17. Qb4 Qd8 18. Nb3 Be8 19. Qa3 Bd6 20. Nc5 Nxc5 21. dxc5 Rxc5 22. Qb2 Rac8 23. g3 Qc7 24. Nd2 Rxc3 25. Rxc3 Qxc3 26. Qxc3 Rxc3 27. Nf3 Bd7 28. Nd4 e5 29. Nxb5 Bxb5 30. Bxb5 axb5 31. a6 Rc8 32. a7 Ra8 33. Ra6 Bc5 34. Ra5 Bxa7 35. Rxb5 Rd8 36. Kf1 f6 37. Ke2 d4 38. g4 d3+ 39. Kd2 Rd7 40. Rb3 Kf7 41. h4 Kg6 42. Rb4 h5 43. gxh5+ Kxh5 44. Re4 Bb8 45. f3 Bc7 46. Ra4 f5 47. Ra6 Kxh4 48. Rg6 Ba5+ 49. Kd1 Rb7 50. Kc1 d2+ 51. Kc2 Rc7+ 52. Kb2 d1Q 53. e4 Qc2+ 54. Ka3 Rc3# 0-1

[Event "Warsaw YMCA Summer-A 261st"]
[Site "Warsaw"]
[Date "2022.06.28"]
[Round "1"]
[White "Mazurek, Jerzy"]
[Black "Safanowski, Tomasz"]
[Result "1/2-1/2"]
[ECO "C14"]
[WhiteElo "1746"]
[BlackElo "1671"]
[PlyCount "36"]
[EventDate "2022.06.29"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bxe7 Qxe7 7. f4 0-0 8. Nf3 c5 9. Qd2 Nc6 10. 0-0-0 cxd4 11. Nb5 f6 12. exf6 Nxf6 13. Nbxd4 Ne4 14. Qe3 Bd7 15. Bd3 Nxd4 16. Nxd4 e5 17. fxe5 Qxe5 18. Nf3 Qe7 1/2-1/2

[Event "Warsaw YMCA Spring-B 258th"]
[Site "Warsaw"]
[Date "2022.06.23"]
[Round "11"]
[White "Milczarek, Robert"]
[Black "Mazurek, Jerzy"]
[Result "1/2-1/2"]
[ECO "E92"]
[WhiteElo "1668"]
[BlackElo "1746"]
[PlyCount "59"]
[EventDate "2022.04.07"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. Be2 e5 7. dxe5 dxe5 8. Qxd8 Rxd8 9. Bg5 Re8 10. Nd5 Nxd5 11. cxd5 c6 12. Bc4 b5 13. Bb3 Bb7 14. Rc1 h6 15. Be3 Rc8 16. 0-0 Nd7 17. dxc6 Bxc6 18. Rxc6 Rxc6 19. Bd5 Rac8 20. Bxc6 Rxc6 21. Rd1 Rc7 22. g3 Nf6 23. Rd8+ Kh7 24. Nxe5 Nxe4 25. Nd3 Bf6 26. Ra8 Rd7 27. Nc5 Nxc5 28. Bxc5 Bxb2 29. Rxa7 Rxa7 30. Bxa7 1/2-1/2

[Event "Warsaw YMCA Spring-B 258th"]
[Site "Warsaw"]
[Date "2022.06.09"]
[Round "10"]
[White "Mazurek, Jerzy"]
[Black "Kuc, Mariusz"]
[Result "1-0"]
[ECO "B80"]
[WhiteElo "1746"]
[BlackElo "1727"]
[PlyCount "57"]
[EventDate "2022.04.07"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be3 a6 7. f3 b5 8. g4 h6 9. Qd2 Nbd7 10. 0-0-0 b4 11. Nce2 Qc7 12. Ng3 Bb7 13. h4 d5 14. g5 hxg5 15. hxg5 Rxh1 16. Nxh1 Nh5 17. g6 Nc5 18. gxf7+ Kxf7 19. Be2 e5 20. Nf5 d4 21. Bg5 Ne6 22. Kb1 Nhf4 23. Bxf4 Nxf4 24. Nf2 Rc8 25. Nd3 Nxe2 26. Qxe2 a5 27. Qh2 Re8 28. Qh5+ Kg8 29. Qxe8 1-0

[Event "Warsaw YMCA Spring-B 258th"]
[Site "Warsaw"]
[Date "2022.05.31"]
[Round "9"]
[White "Mazurek, Jerzy"]
[Black "Basiaga, Sebastian"]
[Result "1-0"]
[ECO "C78"]
[WhiteElo "1746"]
[BlackElo "1775"]
[PlyCount "117"]
[EventDate "2022.04.07"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 b5 6. Bb3 Bc5 7. a4 Bb7 8. c3 d6 9. d4 Bb6 10. Bg5 0-0 11. Bd5 h6 12. Bxf6 Qxf6 13. Na3 Rab8 14. axb5 axb5 15. Nxb5 Ne7 16. Bxb7 Rxb7 17. dxe5 dxe5 18. Na3 Ng6 19. g3 Rd8 20. Qe2 Bc5 21. Nc4 Be7 22. Ra5 Bd6 23. h4 Re8 24. Rd1 Qe6 25. h5 Nf8 26. Nh4 g6 27. Rad5 Be7 28. Rxe5 Qa6 29. hxg6 fxg6 30. Nf3 Qf6 31. Ne3 c6 32. Ng4 Qg7 33. Qc4+ Kh8 34. Qxc6 Reb8 35. b4 h5 36. Ne3 Bf6 37. Rc5 Be7 38. Rcd5 Rb6 39. Qc4 Ne6 40. Rd7 Nf8 41. Ra7 R6b7 42. Rxb7 Rxb7 43. Qc6 Ra7 44. Nd5 Bd8 45. Nf4 Rc7 46. Nxg6+ Qxg6 47. Qxg6 Nxg6 48. Rxd8+ Kg7 49. Rd3 Kf6 50. b5 Rc5 51. Rd6+ Kf7 52. b6 Rxc3 53. Ng5+ Kg7 54. Ne6+ Kh7 55. b7 Rb3 56. Nc5 Rb1+ 57. Kg2 Ne5 58. Re6 Nf7 59. Re8 1-0

[Event "Warsaw YMCA Spring-B 258th"]
[Site "Warsaw"]
[Date "2022.05.26"]
[Round "8"]
[White "Sypula, Krzysztof"]
[Black "Mazurek, Jerzy"]
[Result "1-0"]
[ECO "E62"]
[WhiteElo "1680"]
[BlackElo "1746"]
[PlyCount "71"]
[EventDate "2022.04.07"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 d6 5. d4 0-0 6. Nc3 Nc6 7. d5 Na5 8. b3 Nxd5 9. Nxd5 Bxa1 10. Bd2 Nxb3 11. axb3 Bg7 12. h4 c6 13. Ne3 h6 14. Qc2 e5 15. h5 g5 16. g4 Be6 17. Bc3 Qd7 18. Bh3 a5 19. 0-0 b5 20. Rd1 Qc7 21. Nf5 Rfd8 22. Nxg7 Kxg7 23. c5 f6 24. Qg6+ Kf8 25. Qxf6+ Qf7 26. Qxh6+ Ke7 27. Nxg5 Qg8 28. Rxd6 Rxd6 29. cxd6+ Kxd6 30. Ne4+ Kc7 31. Bxe5+ Kb7 32. Nc5+ Kb6 33. Nxe6 a4 34. Bd4+ Kb7 35. Nc5+ Kc7 36. Qf4+ 1-0

[Event "Warsaw YMCA Spring-B 258th"]
[Site "Warsaw"]
[Date "2022.05.19"]
[Round "7"]
[White "Mazurek, Jerzy"]
[Black "Sloniewska, Alicja"]
[Result "1-0"]
[ECO "D23"]
[WhiteElo "1746"]
[BlackElo "1737"]
[PlyCount "55"]
[EventDate "2022.04.07"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. c4 c6 2. Nf3 d5 3. d4 Nf6 4. Qb3 dxc4 5. Qxc4 Bf5 6. g3 e6 7. Bg2 Nbd7 8. 0-0 Be7 9. Nc3 0-0 10. e3 Ne4 11. Nd2 Nd6 12. Qe2 e5 13. dxe5 Nxe5 14. e4 Be6 15. Rd1 Qc7 16. b3 Rad8 17. Bb2 Bg4 18. f3 Be6 19. Nf1 a6 20. Ne3 Nb5 21. Nxb5 cxb5 22. f4 Nc6 23. f5 Bc8 24. Nd5 Bc5+ 25. Kh1 Qb8 26. Nf6+ Kh8 27. Qh5 h6 28. Nd7 1-0

[Event "Warsaw YMCA Spring-B 258th"]
[Site "Warsaw"]
[Date "2022.05.11"]
[Round "6"]
[White "Pichurko, Jakub"]
[Black "Mazurek, Jerzy"]
[Result "1/2-1/2"]
[ECO "A48"]
[WhiteElo "1767"]
[BlackElo "1746"]
[PlyCount "93"]
[EventDate "2022.04.07"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. Bf4 Bg7 4. e3 0-0 5. Be2 d6 6. h3 b6 7. 0-0 c5 8. c3 Bb7 9. Nbd2 Nbd7 10. a4 Rc8 11. a5 Qc7 12. Bh2 Bc6 13. axb6 axb6 14. c4 e5 15. d5 Bb7 16. e4 Ra8 17. Qc2 Rfb8 18. Rfb1 Bc8 19. Ne1 Qb7 20. Qc3 Rxa1 21. Rxa1 Ra8 22. Ra3 Bh6 23. Nef3 Nb8 24. g4 Bxd2 25. Nxd2 Ne8 26. f4 f6 27. Kg2 Rxa3 28. Qxa3 Qa6 29. Qxa6 Nxa6 30. Kg3 h6 31. h4 Nb4 32. Bg1 Kg7 33. Nb1 Nc2 34. Nc3 Bd7 35. Bd1 Nd4 36. Be3 Nc7 37. fxe5 fxe5 38. Ba4 Bxa4 39. Nxa4 b5 40. Nb6 bxc4 41. Nxc4 Ncb5 42. Bd2 h5 43. gxh5 gxh5 44. b4 Nb3 45. Be1 Kf6 46. bxc5 Nxc5 47. Nd2 1/2-1/2

[Event "Warsaw YMCA Spring-B 258th"]
[Site "Warsaw"]
[Date "2022.05.05"]
[Round "5"]
[White "Mazurek, Jerzy"]
[Black "Safanowski, Tomasz"]
[Result "1/2-1/2"]
[ECO "C02"]
[WhiteElo "1746"]
[BlackElo "1671"]
[PlyCount "41"]
[EventDate "2022.04.07"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 b6 4. c3 Qd7 5. Bd3 Ne7 6. Ne2 Ba6 7. Bc2 c5 8. Nd2 Nbc6 9. Nf3 cxd4 10. cxd4 Nb4 11. Bb1 Qb5 12. a4 Qc4 13. b3 Qxe2+ 14. Qxe2 Bxe2 15. Kxe2 Nec6 16. Ba3 Na5 17. Bxb4 Bxb4 18. Bd3 a6 19. Rab1 Kd7 20. Rhc1 f6 21. Rc2 1/2-1/2

[Event "Warsaw YMCA Spring-B 258th"]
[Site "Warsaw"]
[Date "2022.04.27"]
[Round "4"]
[White "Nocek, Dominik"]
[Black "Mazurek, Jerzy"]
[Result "1-0"]
[ECO "B70"]
[WhiteElo "1675"]
[BlackElo "1746"]
[PlyCount "139"]
[EventDate "2022.04.07"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. g3 g6 7. Bg2 Nxd4 8. Qxd4 Bg7 9. 0-0 0-0 10. Qd3 Ng4 11. Qe2 Be6 12. Nd5 Rc8 13. c3 Ne5 14. Be3 b6 15. Bd4 Nc4 16. Bxg7 Kxg7 17. b3 Na5 18. c4 Qd7 19. f4 f6 20. Rac1 Nc6 21. Qd3 Bf7 22. Rfd1 Rfd8 23. a3 e5 24. Rf1 Bxd5 25. exd5 Nd4 26. a4 Rf8 27. Rce1 Qc7 28. Kh1 Qc5 29. Rd1 Qb4 30. Rb1 a6 31. Rfd1 Rc5 32. Qd2 Qxd2 33. Rxd2 b5 34. axb5 axb5 35. Bf1 Ra8 36. b4 Rc7 37. cxb5 Rb7 38. Rf2 Nxb5 39. Bxb5 Rxb5 40. fxe5 fxe5 41. Rc2 Rxd5 42. Rc7+ Kh6 43. b5 Ra5 44. Rb7 Rc5 45. Rd1 d5 46. b6 Rab5 47. Rb8 d4 48. Ra1 Rc6 49. b7 Rc7 50. Re1 d3 51. Rd8 Rbxb7 52. Rxd3 Re7 53. Rde3 Kg5 54. Re4 h5 55. Kg2 Rb2+ 56. Kf3 Kf5 57. h3 Rb5 58. Kg2 g5 59. g4+ hxg4 60. hxg4+ Ke6 61. Kg3 Kd5 62. R1e2 Rb3+ 63. Kg2 Rd3 64. Kf2 Re6 65. Ra4 Rc3 66. Ra5+ Rc5 67. Rd2+ Kc4 68. Rc2+ Kd3 69. Rcxc5 e4 70. Rd5+ 1-0

[Event "Warsaw YMCA Spring-B 258th"]
[Site "Warsaw"]
[Date "2022.04.21"]
[Round "3"]
[White "Mazurek, Jerzy"]
[Black "Szukalski, Antoni"]
[Result "1/2-1/2"]
[ECO "E38"]
[WhiteElo "1746"]
[BlackElo "1702"]
[PlyCount "93"]
[EventDate "2022.04.07"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 e6 3. d4 Bb4 4. Qc2 c5 5. dxc5 Bxc5 6. Bf4 a6 7. e3 Nc6 8. Nf3 h6 9. Be2 Nh5 10. Bg3 Nxg3 11. hxg3 Be7 12. g4 d6 13. 0-0-0 Qa5 14. a3 Bd7 15. Rh5 Qc7 16. g5 0-0-0 17. gxh6 gxh6 18. Rdh1 Na5 19. Ne4 Rhg8 20. Ng3 Bf8 21. R5h2 Bg7 22. Nd4 Kb8 23. Kb1 Qb6 24. Qd2 Rc8 25. Rc1 e5 26. Qb4 Qxb4 27. axb4 Nxc4 28. Rxc4 Rxc4 29. Bxc4 exd4 30. exd4 Bxd4 31. Rxh6 Bxf2 32. Ne4 Bf5 33. Bd3 Rxg2 34. Rf6 Bxe4 35. Bxe4 Bd4 36. Bxg2 Bxf6 37. Bd5 Bh4 38. Bxf7 Be1 39. b5 axb5 40. Be8 b4 41. Kc2 Kc7 42. Kd3 d5 43. b3 Kd6 44. Bg6 Ke5 45. Kc2 Kd4 46. Bf5 Ke3 47. Bg6 1/2-1/2

[Event "Warsaw YMCA Spring-B 258th"]
[Site "Warsaw"]
[Date "2022.04.13"]
[Round "2"]
[White "Kacprzak, Karol"]
[Black "Mazurek, Jerzy"]
[Result "1/2-1/2"]
[ECO "A25"]
[WhiteElo "1699"]
[BlackElo "1746"]
[PlyCount "105"]
[EventDate "2022.04.07"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nc6 3. g3 Bc5 4. Bg2 d6 5. d3 a6 6. a3 Ba7 7. b4 Nge7 8. e3 Nf5 9. Nge2 Rb8 10. b5 axb5 11. Nxb5 Bb6 12. d4 exd4 13. Nbxd4 Ncxd4 14. Nxd4 Nxd4 15. exd4 Qe7+ 16. Be3 Ba5+ 17. Kf1 0-0 18. Qd3 Re8 19. Rb1 g6 20. Rb5 Bb6 21. h4 Bd7 22. Rb2 Bf5 23. Qc3 h5 24. Bf3 Be4 25. Bxe4 Qxe4 26. Kg1 Ra8 27. Kh2 Qf3 28. c5 Ba5 29. Qb3 b6 30. cxd6 cxd6 31. Bf4 Qe4 32. d5 Rac8 33. Rd1 Rc3 34. Qb5 Rec8 35. Re2 Qf3 36. Re8+ Kg7 37. Rxc8 Qxf2+ 38. Kh3 Rxc8 39. Rf1 Qd4 40. Qd7 Rf8 41. Bxd6 Qg4+ 42. Qxg4 hxg4+ 43. Kxg4 f5+ 44. Kf3 Rd8 45. Be5+ Kf7 46. Rd1 b5 47. Rd3 b4 48. axb4 Bxb4 49. Bc7 Rd7 50. d6 Ke6 51. Kf4 Kf6 52. Bb8 Bc5 53. Bc7 1/2-1/2

[Event "Warsaw YMCA Spring-B 258th"]
[Site "Warsaw"]
[Date "2022.04.07"]
[Round "1"]
[White "Mazurek, Jerzy"]
[Black "Matyszkiewicz, Wiktor"]
[Result "1-0"]
[ECO "B56"]
[WhiteElo "1746"]
[BlackElo "1777"]
[PlyCount "45"]
[EventDate "2022.04.07"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Bb5+ Bd7 7. Bxd7+ Qxd7 8. Nde2 Be7 9. Bg5 Nc6 10. Bxf6 Bxf6 11. Qd2 0-0 12. 0-0-0 Rfd8 13. Kb1 b5 14. Nd5 Be7 15. f3 Bf8 16. g4 b4 17. h4 Rdb8 18. h5 Ne7 19. h6 Nxd5 20. hxg7 Nc3+ 21. Nxc3 bxc3 22. gxf8Q+ Rxf8 23. Qg5+ 1-0

[Event "Warsaw YMCA Autumn-B 249th"]
[Site "Warsaw"]
[Date "2021.12.09"]
[Round "13"]
[White "Mazurek, Jerzy"]
[Black "Dropia, Rafal"]
[Result "0-1"]
[ECO "B07"]
[WhiteElo "1691"]
[BlackElo "1621"]
[PlyCount "106"]
[EventDate "2021.09.23"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 d6 2. d4 e5 3. dxe5 dxe5 4. Qxd8+ Kxd8 5. Nf3 f6 6. Be3 Be6 7. Nbd2 Nd7 8. Nb3 Bd6 9. 0-0-0 Ne7 10. Nfd2 Nc6 11. Bc4 Ke7 12. c3 a6 13. Bxe6 Kxe6 14. Nc4 Be7 15. Rd2 Rad8 16. Rhd1 b6 17. f3 g6 18. g3 Ndb8 19. Rxd8 Rxd8 20. Rxd8 Bxd8 21. Kc2 Nd7 22. Bf2 Ne7 23. Ne3 c6 24. Nc1 b5 25. Nd3 Bb6 26. c4 Bd4 27. cxb5 axb5 28. b3 Nb6 29. Nd1 Kd6 30. Be3 c5 31. Bd2 Nc6 32. a3 Bg1 33. Be3 Bxe3 34. Nxe3 Nd4+ 35. Kc3 Nxf3 36. h4 Nd4 37. g4 Ne2+ 38. Kd2 Ng3 39. Nf2 c4 40. a4 bxa4 41. bxa4 Nxa4 42. Nxc4+ Kc5 43. Ne3 Kd6 44. Kd3 Nc5+ 45. Kc4 Ngxe4 46. Nh3 Nd2+ 47. Kc3 Nf3 48. Ng2 Kd5 49. Nf2 Ne4+ 50. Nxe4 Kxe4 51. Kc2 h5 52. gxh5 gxh5 53. Kd1 Kd3 0-1

[Event "Warsaw YMCA Autumn-B 249th"]
[Site "Warsaw"]
[Date "2021.12.08"]
[Round "12"]
[White "Mazurek, Jerzy"]
[Black "Sypula, Krzysztof"]
[Result "1/2-1/2"]
[ECO "B06"]
[WhiteElo "1691"]
[BlackElo "1656"]
[PlyCount "66"]
[EventDate "2021.09.23"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 d6 2. d4 g6 3. Nc3 Bg7 4. Be3 a6 5. a4 Nf6 6. h3 Nc6 7. g4 e5 8. d5 Ne7 9. Bg2 c6 10. dxc6 bxc6 11. Qd2 0-0 12. Rd1 Rb8 13. b3 Qa5 14. Nge2 Rd8 15. 0-0 Qc7 16. a5 Qxa5 17. Nd5 Qxd2 18. Nxe7+ Kf8 19. Nxg6+ hxg6 20. Rxd2 Bb7 21. g5 Ne8 22. Bb6 Rd7 23. Bf3 Bc8 24. Ba5 Kg8 25. Bg4 Rdb7 26. Bxc8 Rxc8 27. Bc3 Bf8 28. Kg2 Ng7 29. h4 Ne6 30. f4 exf4 31. Nxf4 Nc5 32. Kf3 Re8 33. Re2 Rbe7 1/2-1/2

[Event "Warsaw YMCA Autumn-B 249th"]
[Site "Warsaw"]
[Date "2021.12.01"]
[Round "11"]
[White "Mazurek, Jerzy"]
[Black "Szumigaj, Marcin"]
[Result "1-0"]
[ECO "C47"]
[WhiteElo "1691"]
[BlackElo "1473"]
[PlyCount "65"]
[EventDate "2021.09.23"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nc3 Nc6 4. d4 exd4 5. Nxd4 Bb4 6. Nxc6 bxc6 7. Bd3 0-0 8. 0-0 Be7 9. e5 Nd5 10. Ne2 Nb4 11. Be4 d5 12. exd6 cxd6 13. c3 d5 14. Bb1 Na6 15. Nd4 c5 16. Nc6 Qc7 17. Nxe7+ Qxe7 18. Qxd5 Bb7 19. Qh5 f5 20. Bd3 Nc7 21. Bg5 Qd6 22. Bc4+ Kh8 23. Rfe1 Qc6 24. f3 Nd5 25. Rad1 Nf6 26. Qh4 Qc7 27. Re6 Rad8 28. Rde1 Rde8 29. Bxf6 Rxe6 30. Rxe6 gxf6 31. Rxf6 Rd8 32. Rf7 Rd1+ 33. Kf2 1-0

[Event "Warsaw YMCA Autumn-B 249th"]
[Site "Warsaw"]
[Date "2021.11.25"]
[Round "10"]
[White "Dabrowski, Leszek"]
[Black "Mazurek, Jerzy"]
[Result "0-1"]
[ECO "B26"]
[WhiteElo "1436"]
[BlackElo "1691"]
[PlyCount "104"]
[EventDate "2021.09.23"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. d3 Nc6 3. Nf3 g6 4. g3 Bg7 5. Bg2 e5 6. Nc3 Nge7 7. Be3 d6 8. Qd2 Nd4 9. Ne2 0-0 10. Nfxd4 cxd4 11. Bh6 f6 12. Bxg7 Kxg7 13. 0-0 Be6 14. c3 Qa5 15. b4 dxc3 16. Qxc3 Qb6 17. Qb2 Rac8 18. Rfc1 a5 19. a3 Rc6 20. d4 Rfc8 21. Rxc6 bxc6 22. Rc1 axb4 23. d5 cxd5 24. Rxc8 Bxc8 25. axb4 d4 26. Nc1 Nc6 27. Nd3 Ba6 28. Bf1 Bxd3 29. Bxd3 Qxb4 30. Qe2 Qc3 31. Bc4 Nb4 32. Be6 Qc1+ 33. Qf1 Qxf1+ 34. Kxf1 Kf8 35. Ke2 Ke7 36. Bg8 h6 37. g4 g5 38. Kd2 d5 39. f3 Kd6 40. Bf7 Kc5 41. Be6 dxe4 42. fxe4 Nc6 43. Ba2 Kb4 44. Kd3 Na5 45. Bd5 Nb3 46. Kc2 Nc5 47. Kd2 Nd7 48. Kd3 Kc5 49. Ba2 Nf8 50. Bf7 Kd6 51. Bb3 Ne6 52. Bd1 Nc5+ 0-1

[Event "Warsaw YMCA Autumn-B 249th"]
[Site "Warsaw"]
[Date "2021.11.18"]
[Round "9"]
[White "Mazurek, Jerzy"]
[Black "Goral, Jan"]
[Result "1-0"]
[ECO "A36"]
[WhiteElo "1691"]
[BlackElo "1672"]
[PlyCount "119"]
[EventDate "2021.09.23"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e4 d6 6. Nge2 e6 7. 0-0 Nge7 8. d3 0-0 9. Rb1 Rb8 10. a3 a6 11. b4 Nd4 12. Nxd4 cxd4 13. Ne2 b5 14. a4 Bd7 15. cxb5 axb5 16. a5 Bc6 17. Bd2 d5 18. f3 Qd6 19. Nf4 e5 20. Nxd5 Nxd5 21. exd5 Bxd5 22. f4 Rbc8 23. Bxd5 Qxd5 24. Qb3 Qxb3 25. Rxb3 Rc2 26. Rf2 Rfc8 27. Ra3 f5 28. fxe5 Bxe5 29. a6 Ra8 30. Bf4 Rxf2 31. Kxf2 Bxf4 32. gxf4 Kf7 33. a7 Ke6 34. Kg3 Ke7 35. Kh4 h6 36. Ra6 Kf7 37. h3 Kg7 38. Kg3 g5 39. fxg5 hxg5 40. h4 gxh4+ 41. Kxh4 Kf7 42. Kg5 Ke7 43. Kxf5 Kd7 44. Ke5 Kc7 45. Kxd4 Kb7 46. Ra5 Kb6 47. Ke5 Re8+ 48. Kf6 Rf8+ 49. Ke7 Ra8 50. Kd7 Rxa7+ 51. Rxa7 Kxa7 52. Kc6 Ka6 53. d4 Ka7 54. Kxb5 Kb7 55. d5 Kc7 56. Kc5 Kd7 57. b5 Kc7 58. b6+ Kb7 59. Kb5 Kb8 60. Kc6 1-0

