[Event "Hamburg HSK Easter op"]
[Site "Hamburg"]
[Date "2025.04.21"]
[Round "7"]
[White "Kollath, Leno"]
[Black "Skibbe, Kai"]
[Result "1/2-1/2"]
[ECO "B13"]
[WhiteElo "1705"]
[BlackElo "1840"]
[PlyCount "35"]
[EventDate "2025.04.18"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CB20_2025"]
[SourceDate "2025.05.14"]
[SourceVersion "1"]
[SourceVersionDate "2025.05.14"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nc6 5. c3 Nf6 6. Nf3 Bg4 7. Bf4 e6 8. Nbd2 Bd6 9. Bxd6 Qxd6 10. 0-0 0-0 11. h3 Bh5 12. Re1 Rab8 13. a4 a6 14. Qc2 Rfc8 15. Qd1 b5 16. Qe2 Bg6 17. Bxg6 hxg6 18. Ne5 1/2-1/2

[Event "Hamburg HSK Easter op"]
[Site "Hamburg"]
[Date "2025.04.21"]
[Round "7"]
[White "Kollath, Leno"]
[Black "Skibbe, Kai"]
[Result "1/2-1/2"]
[ECO "B13"]
[WhiteElo "1705"]
[BlackElo "1840"]
[PlyCount "35"]
[EventDate "2025.04.18"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CB20_2025"]
[SourceDate "2025.05.14"]
[SourceVersion "1"]
[SourceVersionDate "2025.05.14"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nc6 5. c3 Nf6 6. Nf3 Bg4 7. Bf4 e6 8. Nbd2 Bd6 9. Bxd6 Qxd6 10. 0-0 0-0 11. h3 Bh5 12. Re1 Rab8 13. a4 a6 14. Qc2 Rfc8 15. Qd1 b5 16. Qe2 Bg6 17. Bxg6 hxg6 18. Ne5 1/2-1/2

[Event "Hamburg HSK Easter op"]
[Site "Hamburg"]
[Date "2025.04.20"]
[Round "5"]
[White "Kollath, Leno"]
[Black "Koop, Michael1"]
[Result "1-0"]
[ECO "B13"]
[WhiteElo "1705"]
[BlackElo "1569"]
[PlyCount "105"]
[EventDate "2025.04.18"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CB20_2025"]
[SourceDate "2025.05.14"]
[SourceVersion "1"]
[SourceVersionDate "2025.05.14"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nf6 5. c3 b6 6. Bf4 Bd7 7. Nf3 Nc6 8. 0-0 Nh5 9. Be3 g6 10. Re1 Qc7 11. Nbd2 Nf4 12. Bxf4 Qxf4 13. Nf1 Bg4 14. Bb5 Bd7 15. Qa4 Qc7 16. Ne3 0-0-0 17. Nxd5 Qd6 18. Nb4 Nxb4 19. cxb4 Kb8 20. Ne5 Bxb5 21. Qxb5 Qd5 22. Qxd5 Rxd5 23. Nxf7 Rg8 24. Ne5 Kb7 25. Rad1 Bg7 26. Nf3 Rgd8 27. Rxe7+ R8d7 28. Rxd7+ Rxd7 29. h3 Kc6 30. Kf1 Kb5 31. a3 Kc4 32. Ke2 Rd5 33. Rd3 Kb5 34. b3 Ka6 35. Rd1 Kb7 36. Kd3 Kc7 37. Rc1+ Kd6 38. Rc8 a5 39. Rd8+ Kc6 40. Rxd5 Kxd5 41. bxa5 bxa5 42. b4 axb4 43. axb4 Bf6 44. g4 h6 45. h4 g5 46. hxg5 hxg5 47. b5 Bd8 48. Nd2 Bc7 49. Nc4 Bd8 50. Ne3+ Kd6 51. Ke4 Ke6 52. Nc4 Kd7 53. d5 1-0

[Event "Hamburg HSK Easter op"]
[Site "Hamburg"]
[Date "2025.04.20"]
[Round "5"]
[White "Kollath, Leno"]
[Black "Koop, Michael1"]
[Result "1-0"]
[ECO "B13"]
[WhiteElo "1705"]
[BlackElo "1569"]
[PlyCount "105"]
[EventDate "2025.04.18"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CB20_2025"]
[SourceDate "2025.05.14"]
[SourceVersion "1"]
[SourceVersionDate "2025.05.14"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nf6 5. c3 b6 6. Bf4 Bd7 7. Nf3 Nc6 8. 0-0 Nh5 9. Be3 g6 10. Re1 Qc7 11. Nbd2 Nf4 12. Bxf4 Qxf4 13. Nf1 Bg4 14. Bb5 Bd7 15. Qa4 Qc7 16. Ne3 0-0-0 17. Nxd5 Qd6 18. Nb4 Nxb4 19. cxb4 Kb8 20. Ne5 Bxb5 21. Qxb5 Qd5 22. Qxd5 Rxd5 23. Nxf7 Rg8 24. Ne5 Kb7 25. Rad1 Bg7 26. Nf3 Rgd8 27. Rxe7+ R8d7 28. Rxd7+ Rxd7 29. h3 Kc6 30. Kf1 Kb5 31. a3 Kc4 32. Ke2 Rd5 33. Rd3 Kb5 34. b3 Ka6 35. Rd1 Kb7 36. Kd3 Kc7 37. Rc1+ Kd6 38. Rc8 a5 39. Rd8+ Kc6 40. Rxd5 Kxd5 41. bxa5 bxa5 42. b4 axb4 43. axb4 Bf6 44. g4 h6 45. h4 g5 46. hxg5 hxg5 47. b5 Bd8 48. Nd2 Bc7 49. Nc4 Bd8 50. Ne3+ Kd6 51. Ke4 Ke6 52. Nc4 Kd7 53. d5 1-0

[Event "Hamburg HSK Easter op"]
[Site "Hamburg"]
[Date "2025.04.20"]
[Round "6"]
[White "Rudolph, Max"]
[Black "Kollath, Leno"]
[Result "1/2-1/2"]
[ECO "C52"]
[WhiteElo "1864"]
[BlackElo "1705"]
[PlyCount "48"]
[EventDate "2025.04.18"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CB20_2025"]
[SourceDate "2025.05.14"]
[SourceVersion "1"]
[SourceVersionDate "2025.05.14"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 d6 7. Qb3 Qd7 8. 0-0 Bb6 9. Bb5 a6 10. Ba4 Ba5 11. Bxc6 Qxc6 12. dxe5 Be6 13. Nd4 Bxb3 14. Nxc6 bxc6 15. axb3 Bb6 16. Bf4 d5 17. Nd2 Ne7 18. Ra4 Ng6 19. Bg3 Kd7 20. Rd1 Ke6 21. exd5+ cxd5 22. Nf3 h6 23. Nd4+ Bxd4 24. cxd4 Rhb8 1/2-1/2

[Event "Hamburg HSK Easter op"]
[Site "Hamburg"]
[Date "2025.04.20"]
[Round "6"]
[White "Rudolph, Max"]
[Black "Kollath, Leno"]
[Result "1/2-1/2"]
[ECO "C52"]
[WhiteElo "1864"]
[BlackElo "1705"]
[PlyCount "48"]
[EventDate "2025.04.18"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CB20_2025"]
[SourceDate "2025.05.14"]
[SourceVersion "1"]
[SourceVersionDate "2025.05.14"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 d6 7. Qb3 Qd7 8. 0-0 Bb6 9. Bb5 a6 10. Ba4 Ba5 11. Bxc6 Qxc6 12. dxe5 Be6 13. Nd4 Bxb3 14. Nxc6 bxc6 15. axb3 Bb6 16. Bf4 d5 17. Nd2 Ne7 18. Ra4 Ng6 19. Bg3 Kd7 20. Rd1 Ke6 21. exd5+ cxd5 22. Nf3 h6 23. Nd4+ Bxd4 24. cxd4 Rhb8 1/2-1/2

[Event "Hamburg HSK Easter op"]
[Site "Hamburg"]
[Date "2025.04.19"]
[Round "3"]
[White "Kollath, Leno"]
[Black "Pavlov, Dmitriy"]
[Result "1-0"]
[ECO "C01"]
[WhiteElo "1705"]
[BlackElo "1647"]
[PlyCount "85"]
[EventDate "2025.04.18"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CB20_2025"]
[SourceDate "2025.05.14"]
[SourceVersion "1"]
[SourceVersionDate "2025.05.14"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. Bd3 Bd6 5. Nf3 Bg4 6. c3 Ne7 7. h3 Bh5 8. 0-0 Nbc6 9. Re1 0-0 10. Nbd2 Bg6 11. Nf1 Bxd3 12. Qxd3 Ng6 13. Ne3 Nce7 14. Nf5 Nxf5 15. Qxf5 c6 16. Bd2 Qc7 17. Re2 Bf4 18. Bxf4 Nxf4 19. Re3 Ng6 20. Ne5 Nxe5 21. Rxe5 g6 22. Qc2 Rae8 23. Rae1 Rxe5 24. Rxe5 Rd8 25. Qe2 Kf8 26. g3 Qd7 27. Kg2 Re8 28. f4 f6 29. Re3 Rxe3 30. Qxe3 Kf7 31. g4 Qe6 32. Qxe6+ Kxe6 33. h4 h6 34. Kf3 h5 35. f5+ Kf7 36. fxg6+ Kxg6 37. Kf4 hxg4 38. Kxg4 b6 39. b4 a6 40. a4 b5 41. a5 f5+ 42. Kf4 Kh5 43. Kxf5 1-0

[Event "Hamburg HSK Easter op"]
[Site "Hamburg"]
[Date "2025.04.19"]
[Round "3"]
[White "Kollath, Leno"]
[Black "Pavlov, Dmitriy"]
[Result "1-0"]
[ECO "C01"]
[WhiteElo "1705"]
[BlackElo "1647"]
[PlyCount "85"]
[EventDate "2025.04.18"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CB20_2025"]
[SourceDate "2025.05.14"]
[SourceVersion "1"]
[SourceVersionDate "2025.05.14"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. Bd3 Bd6 5. Nf3 Bg4 6. c3 Ne7 7. h3 Bh5 8. 0-0 Nbc6 9. Re1 0-0 10. Nbd2 Bg6 11. Nf1 Bxd3 12. Qxd3 Ng6 13. Ne3 Nce7 14. Nf5 Nxf5 15. Qxf5 c6 16. Bd2 Qc7 17. Re2 Bf4 18. Bxf4 Nxf4 19. Re3 Ng6 20. Ne5 Nxe5 21. Rxe5 g6 22. Qc2 Rae8 23. Rae1 Rxe5 24. Rxe5 Rd8 25. Qe2 Kf8 26. g3 Qd7 27. Kg2 Re8 28. f4 f6 29. Re3 Rxe3 30. Qxe3 Kf7 31. g4 Qe6 32. Qxe6+ Kxe6 33. h4 h6 34. Kf3 h5 35. f5+ Kf7 36. fxg6+ Kxg6 37. Kf4 hxg4 38. Kxg4 b6 39. b4 a6 40. a4 b5 41. a5 f5+ 42. Kf4 Kh5 43. Kxf5 1-0

[Event "Hamburg HSK Easter op"]
[Site "Hamburg"]
[Date "2025.04.19"]
[Round "4"]
[White "Strate, Gerda"]
[Black "Kollath, Leno"]
[Result "1/2-1/2"]
[ECO "C65"]
[WhiteElo "1848"]
[BlackElo "1705"]
[PlyCount "178"]
[EventDate "2025.04.18"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CB20_2025"]
[SourceDate "2025.05.14"]
[SourceVersion "1"]
[SourceVersionDate "2025.05.14"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 Ne7 5. Nxe5 c6 6. Bc4 Qa5+ 7. Nc3 Qxe5 8. g3 Qc7 9. 0-0 d6 10. Bg5 Ng6 11. Bxf6 gxf6 12. d4 Bg7 13. Qf3 0-0 14. h4 Qd7 15. Rfe1 Qg4 16. Qg2 Qd7 17. Be2 Ne7 18. Qf3 f5 19. Rad1 fxe4 20. Nxe4 d5 21. Nf6+ Bxf6 22. Qxf6 Qe6 23. Qg5+ Kh8 24. Bd3 f6 25. Rxe6 fxg5 26. Rxe7 gxh4 27. Rxh7+ Kg8 28. Rxh4 Rf7 29. Re1 Bd7 30. Rh5 Rg7 31. Rhe5 Kf8 32. Bf5 Be8 33. Re6 Rg5 34. Bd3 Rg7 35. Kg2 Rd8 36. Rh6 Kg8 37. Bf5 Rg5 38. Re5 Kg7 39. Rhe6 Bf7 40. Re7 Rb8 41. f4 Rh5 42. Bg4 Rh6 43. Bh5 Rf6 44. Kf3 Kf8 45. Bxf7 Rxf7 46. R7e6 a5 47. g4 Kg7 48. f5 Rbf8 49. Kf4 a4 50. a3 Kh7 51. Re7 Kg7 52. Kg5 Rg8 53. f6+ Kh7+ 54. Kf5 Rgf8 55. Rxf7+ Rxf7 56. g5 Kg8 57. g6 Rf8 58. Re7 b6 59. Re6 c5 60. dxc5 bxc5 61. Ra6 d4 62. Rxa4 Rc8 63. Ra6 c4 64. Ke4 Rd8 65. Rc6 d3 66. cxd3 cxd3 67. Rc1 d2 68. Rd1 Rd6 69. Ke3 Rxf6 70. Rxd2 Rxg6 71. Rd8+ Kf7 72. Kd4 Ke7 73. Rc8 Kd7 74. Rc4 Rg3 75. Rc3 Rg4+ 76. Kc5 Kc7 77. Kb5+ Kb7 78. b4 Rg5+ 79. Rc5 Rg3 80. a4 Rg6 81. a5 Rf6 82. Re5 Rf7 83. a6+ Ka7 84. Ka5 Rf1 85. Re7+ Ka8 86. b5 Rf8 87. a7 Rc8 88. Ka6 Rc6+ 89. Ka5 Ra6+ 1/2-1/2

[Event "Hamburg HSK Easter op"]
[Site "Hamburg"]
[Date "2025.04.19"]
[Round "4"]
[White "Strate, Gerda"]
[Black "Kollath, Leno"]
[Result "1/2-1/2"]
[ECO "C65"]
[WhiteElo "1848"]
[BlackElo "1705"]
[PlyCount "178"]
[EventDate "2025.04.18"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CB20_2025"]
[SourceDate "2025.05.14"]
[SourceVersion "1"]
[SourceVersionDate "2025.05.14"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 Ne7 5. Nxe5 c6 6. Bc4 Qa5+ 7. Nc3 Qxe5 8. g3 Qc7 9. 0-0 d6 10. Bg5 Ng6 11. Bxf6 gxf6 12. d4 Bg7 13. Qf3 0-0 14. h4 Qd7 15. Rfe1 Qg4 16. Qg2 Qd7 17. Be2 Ne7 18. Qf3 f5 19. Rad1 fxe4 20. Nxe4 d5 21. Nf6+ Bxf6 22. Qxf6 Qe6 23. Qg5+ Kh8 24. Bd3 f6 25. Rxe6 fxg5 26. Rxe7 gxh4 27. Rxh7+ Kg8 28. Rxh4 Rf7 29. Re1 Bd7 30. Rh5 Rg7 31. Rhe5 Kf8 32. Bf5 Be8 33. Re6 Rg5 34. Bd3 Rg7 35. Kg2 Rd8 36. Rh6 Kg8 37. Bf5 Rg5 38. Re5 Kg7 39. Rhe6 Bf7 40. Re7 Rb8 41. f4 Rh5 42. Bg4 Rh6 43. Bh5 Rf6 44. Kf3 Kf8 45. Bxf7 Rxf7 46. R7e6 a5 47. g4 Kg7 48. f5 Rbf8 49. Kf4 a4 50. a3 Kh7 51. Re7 Kg7 52. Kg5 Rg8 53. f6+ Kh7+ 54. Kf5 Rgf8 55. Rxf7+ Rxf7 56. g5 Kg8 57. g6 Rf8 58. Re7 b6 59. Re6 c5 60. dxc5 bxc5 61. Ra6 d4 62. Rxa4 Rc8 63. Ra6 c4 64. Ke4 Rd8 65. Rc6 d3 66. cxd3 cxd3 67. Rc1 d2 68. Rd1 Rd6 69. Ke3 Rxf6 70. Rxd2 Rxg6 71. Rd8+ Kf7 72. Kd4 Ke7 73. Rc8 Kd7 74. Rc4 Rg3 75. Rc3 Rg4+ 76. Kc5 Kc7 77. Kb5+ Kb7 78. b4 Rg5+ 79. Rc5 Rg3 80. a4 Rg6 81. a5 Rf6 82. Re5 Rf7 83. a6+ Ka7 84. Ka5 Rf1 85. Re7+ Ka8 86. b5 Rf8 87. a7 Rc8 88. Ka6 Rc6+ 89. Ka5 Ra6+ 1/2-1/2

[Event "Hamburg HSK Easter op"]
[Site "Hamburg"]
[Date "2025.04.18"]
[Round "2"]
[White "Koehler, Nils"]
[Black "Kollath, Leno"]
[Result "1/2-1/2"]
[ECO "D02"]
[WhiteElo "1513"]
[BlackElo "1705"]
[PlyCount "64"]
[EventDate "2025.04.18"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CB20_2025"]
[SourceDate "2025.05.14"]
[SourceVersion "1"]
[SourceVersionDate "2025.05.14"]
[SourceQuality "1"]

1. Nf3 d5 2. g3 c5 3. Bg2 Nc6 4. d4 e6 5. 0-0 Nf6 6. Bf4 Qb6 7. b3 cxd4 8. c3 dxc3 9. Nxc3 Be7 10. Rc1 0-0 11. Be3 Qd8 12. Nd4 Nxd4 13. Bxd4 Bd7 14. Re1 Bc6 15. e4 Bb4 16. exd5 Nxd5 17. Bxd5 Bxd5 18. Bxg7 Kxg7 19. Qd4+ Qf6 20. Qxb4 Bc6 21. Ne4 Qh6 22. Qc3+ f6 23. Qe3 Qh3 24. f3 e5 25. Nc5 Rae8 26. Rcd1 Rf7 27. Ne4 Bxe4 28. Qxe4 a6 29. Rd5 Re6 30. Red1 Rfe7 31. Rd7 Kf7 32. Rxb7 Rxb7 1/2-1/2

[Event "Hamburg HSK Easter op"]
[Site "Hamburg"]
[Date "2025.04.18"]
[Round "2"]
[White "Koehler, Nils"]
[Black "Kollath, Leno"]
[Result "1/2-1/2"]
[ECO "D02"]
[WhiteElo "1513"]
[BlackElo "1705"]
[PlyCount "64"]
[EventDate "2025.04.18"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CB20_2025"]
[SourceDate "2025.05.14"]
[SourceVersion "1"]
[SourceVersionDate "2025.05.14"]
[SourceQuality "1"]

1. Nf3 d5 2. g3 c5 3. Bg2 Nc6 4. d4 e6 5. 0-0 Nf6 6. Bf4 Qb6 7. b3 cxd4 8. c3 dxc3 9. Nxc3 Be7 10. Rc1 0-0 11. Be3 Qd8 12. Nd4 Nxd4 13. Bxd4 Bd7 14. Re1 Bc6 15. e4 Bb4 16. exd5 Nxd5 17. Bxd5 Bxd5 18. Bxg7 Kxg7 19. Qd4+ Qf6 20. Qxb4 Bc6 21. Ne4 Qh6 22. Qc3+ f6 23. Qe3 Qh3 24. f3 e5 25. Nc5 Rae8 26. Rcd1 Rf7 27. Ne4 Bxe4 28. Qxe4 a6 29. Rd5 Re6 30. Red1 Rfe7 31. Rd7 Kf7 32. Rxb7 Rxb7 1/2-1/2

[Event "Hamburg HSK Easter op"]
[Site "Hamburg"]
[Date "2025.04.18"]
[Round "1"]
[White "Kollath, Leno"]
[Black "Kotyk, Michael"]
[Result "0-1"]
[ECO "C57"]
[WhiteElo "1705"]
[BlackElo "2239"]
[PlyCount "32"]
[EventDate "2025.04.18"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CB20_2025"]
[SourceDate "2025.05.14"]
[SourceVersion "1"]
[SourceVersionDate "2025.05.14"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 b5 6. Bf1 Nxd5 7. Bxb5 Bb7 8. d3 Be7 9. Ne4 f5 10. Ng3 Qd7 11. Qh5+ g6 12. Qe2 0-0-0 13. Bd2 Nf4 14. Qf3 Qd6 15. Bxf4 Nd4 16. Qd1 exf4 0-1

[Event "Hamburg HSK Easter op"]
[Site "Hamburg"]
[Date "2025.04.18"]
[Round "1"]
[White "Kollath, Leno"]
[Black "Kotyk, Michael"]
[Result "0-1"]
[ECO "C57"]
[WhiteElo "1705"]
[BlackElo "2239"]
[PlyCount "32"]
[EventDate "2025.04.18"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CB20_2025"]
[SourceDate "2025.05.14"]
[SourceVersion "1"]
[SourceVersionDate "2025.05.14"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 b5 6. Bf1 Nxd5 7. Bxb5 Bb7 8. d3 Be7 9. Ne4 f5 10. Ng3 Qd7 11. Qh5+ g6 12. Qe2 0-0-0 13. Bd2 Nf4 14. Qf3 Qd6 15. Bxf4 Nd4 16. Qd1 exf4 0-1

