[Event "POL-ch U20"]
[Site "Bialystok"]
[Date "2007.01.22"]
[Round "9.2"]
[White "Bernacki, Gabriel"]
[Black "Sieliwonik, Piotr"]
[Result "1-0"]
[ECO "C14"]
[WhiteElo "1836"]
[BlackElo "1926"]
[PlyCount "41"]
[EventDate "2007.01.22"]
[EventType "tourn"]
[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. h4 Bxg5 7. hxg5 Qxg5 8. Qd3 h6 9. Nh3 Qe7 10. Qg3 Kf8 11. Nf4 a6 12. Qf3 Kg8 13. Nfxd5 exd5 14. Nxd5 Qd8 15. Bc4 Qf8 16. Nxc7 Ra7 17. Nd5 Nc6 18. 0-0-0 Ncxe5 19. dxe5 Nxe5 20. Qg3 Ng6 21. Qxg6 1-0

[Event "POL-ch U20"]
[Site "Bialystok"]
[Date "2007.01.22"]
[Round "7.1"]
[White "Lapinski, Krzysztof"]
[Black "Sieliwonik, Piotr"]
[Result "1-0"]
[ECO "C14"]
[WhiteElo "2169"]
[BlackElo "1926"]
[PlyCount "27"]
[EventDate "2007.01.22"]
[EventType "tourn"]
[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. h4 0-0 7. Bd3 g6 8. Bh6 Re8 9. h5 Nf8 10. Qg4 f5 11. exf6 Bxf6 12. hxg6 e5 13. gxh7+ Kh8 14. Qg8# 1-0

[Event "POL-ch U20"]
[Site "Bialystok"]
[Date "2007.01.22"]
[Round "2.4"]
[White "Roszkowski, Rafal"]
[Black "Sieliwonik, Piotr"]
[Result "1-0"]
[ECO "C14"]
[WhiteElo "2042"]
[BlackElo "1926"]
[PlyCount "55"]
[EventDate "2007.01.22"]
[EventType "tourn"]
[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. h4 Bxg5 7. hxg5 Qxg5 8. Qd3 h6 9. Nh3 Qe7 10. Qg3 Qf8 11. 0-0-0 a6 12. Nf4 Nb6 13. Nh5 g6 14. Nf6+ Ke7 15. a4 Nc6 16. Be2 Nd7 17. Ng4 h5 18. Ne3 Nb6 19. Qg5+ f6 20. Qxg6 fxe5 21. dxe5 Nxe5 22. Qg3 Nbd7 23. Nexd5+ exd5 24. Nxd5+ Kd6 25. Nb6+ Kc6 26. Nxa8 b6 27. Bf3+ Nxf3 28. Qxc7# 1-0

[Event "POL-ch U20"]
[Site "Bialystok"]
[Date "2007.01.22"]
[Round "1.2"]
[White "Sieliwonik, Piotr"]
[Black "Buzun, Michal"]
[Result "0-1"]
[ECO "D02"]
[WhiteElo "1926"]
[BlackElo "1860"]
[PlyCount "78"]
[EventDate "2007.01.22"]
[EventType "tourn"]
[EventRounds "10"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. Bf4 Bf5 4. e3 e6 5. a3 Bd6 6. Bg5 c5 7. c4 cxd4 8. Nxd4 Bxb1 9. Qa4+ Nbd7 10. Rxb1 dxc4 11. Bxc4 0-0 12. 0-0 Nb6 13. Qb3 Nxc4 14. Qxc4 Bxh2+ 15. Kh1 Bd6 16. Rfd1 Qe7 17. Qe2 h6 18. Bxf6 Qxf6 19. Nf3 Qe7 20. Rd3 Rfd8 21. Rc3 Rac8 22. Rbc1 Rxc3 23. Rxc3 Qf6 24. g3 Be5 25. Rb3 b6 26. Kg2 Rd5 27. Rb4 Qd8 28. Re4 Bf6 29. Ra4 Qc7 30. Rb4 Rc5 31. Ne1 h5 32. Nd3 Ra5 33. Nf4 h4 34. gxh4 Bxh4 35. Nxe6 Qc6+ 36. f3 Be7 37. Nd4 Qg6+ 38. Kf2 Bxb4 39. axb4 Rh5 0-1

[Event "POL-ch U20"]
[Site "Bialystok"]
[Date "2007.01.22"]
[Round "6.5"]
[White "Sieliwonik, Piotr"]
[Black "Chilkiewicz, Marek"]
[Result "1/2-1/2"]
[ECO "D02"]
[WhiteElo "1926"]
[BlackElo "1850"]
[PlyCount "40"]
[EventDate "2007.01.22"]
[EventType "tourn"]
[EventRounds "10"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 e6 3. Bf4 Bd6 4. Bg3 f5 5. e3 Nf6 6. c4 c6 7. Nc3 0-0 8. Bd3 Ne4 9. c5 Nxg3 10. hxg3 Bc7 11. Qc2 Qf6 12. Ne2 Nd7 13. g4 g6 14. gxf5 exf5 15. g3 Rf7 16. 0-0-0 b6 17. cxb6 axb6 18. Qb3 Bb7 19. Nc3 Ra5 20. Kb1 Qe7 1/2-1/2

[Event "POL-ch U20"]
[Site "Bialystok"]
[Date "2007.01.22"]
[Round "3.1"]
[White "Sieliwonik, Piotr"]
[Black "Kopec, Maksymilian"]
[Result "1-0"]
[ECO "D02"]
[WhiteElo "1926"]
[PlyCount "37"]
[EventDate "2007.01.22"]
[EventType "tourn"]
[EventRounds "10"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 c6 3. Bf4 Bg4 4. e3 e6 5. c4 Nf6 6. Nc3 Bb4 7. Rc1 Nbd7 8. Qb3 Qb6 9. c5 Bxc3+ 10. Qxc3 Qd8 11. Be2 0-0 12. 0-0 Ne4 13. Qd3 Bf5 14. Qb3 Qc8 15. Rfd1 f6 16. Nh4 g5 17. Nxf5 gxf4 18. Ne7+ Kg7 19. Nxc8 1-0

[Event "POL-ch U20"]
[Site "Bialystok"]
[Date "2007.01.22"]
[Round "10.3"]
[White "Sieliwonik, Piotr"]
[Black "Nasuta, Grzegorz"]
[Result "0-1"]
[ECO "D02"]
[WhiteElo "1926"]
[BlackElo "1858"]
[PlyCount "82"]
[EventDate "2007.01.22"]
[EventType "tourn"]
[EventRounds "10"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Bf5 3. Bf4 c6 4. e3 e6 5. c4 Nf6 6. Nc3 Bd6 7. Bg5 Nbd7 8. Rc1 h6 9. Bh4 0-0 10. cxd5 exd5 11. Bd3 Bxd3 12. Qxd3 Qa5 13. 0-0 Rfe8 14. Nd2 Ne4 15. Ndxe4 dxe4 16. Nxe4 Bxh2+ 17. Kxh2 Qh5 18. g3 g5 19. Nc5 gxh4 20. Rg1 hxg3+ 21. Kxg3 Kh8 22. Kg2 Rg8+ 23. Kf1 Rxg1+ 24. Kxg1 Rg8+ 25. Kf1 Qh1+ 26. Ke2 Qxc1 27. Nxd7 Rg1 28. Ne5 Qf1+ 29. Kd2 Qxf2+ 30. Kc3 Qe1+ 31. Kc4 Qc1+ 32. Kb4 Qxb2+ 33. Kc5 Qb6+ 34. Kd6 Qd8+ 35. Kc5 Rc1+ 36. Kb4 Qb6+ 37. Ka4 Qb5+ 38. Qxb5 cxb5+ 39. Kxb5 f6 40. Ng6+ Kg7 41. Nf4 Kf7 0-1

[Event "POL-ch U20"]
[Site "Bialystok"]
[Date "2007.01.22"]
[Round "8.4"]
[White "Sieliwonik, Piotr"]
[Black "Puksza, Andrzej"]
[Result "0-1"]
[ECO "D02"]
[WhiteElo "1926"]
[BlackElo "1915"]
[PlyCount "58"]
[EventDate "2007.01.22"]
[EventType "tourn"]
[EventRounds "10"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. Bf4 Bf5 4. e3 e6 5. a3 Bd6 6. Bg5 c5 7. c4 cxd4 8. Nxd4 Bxb1 9. Qa4+ Nbd7 10. Rxb1 dxc4 11. Bxc4 0-0 12. Be2 a6 13. 0-0 h6 14. Bh4 b5 15. Qb3 Qb6 16. Rbc1 Rac8 17. Bxf6 Nxf6 18. g3 Bc5 19. Nf3 Nd5 20. Rb1 Bxe3 21. fxe3 Nxe3 22. Rfc1 Ng4+ 23. Kh1 Qf2 24. Bf1 Ne3 25. Ng1 Rxc1 26. Rxc1 Nxf1 27. Rc2 Qd4 28. Nf3 Qd1 29. Kg2 Ne3+ 0-1

[Event "POL-ch U20"]
[Site "Bialystok"]
[Date "2007.01.22"]
[Round "4.5"]
[White "Siemieniuk, Marek"]
[Black "Sieliwonik, Piotr"]
[Result "0-1"]
[ECO "C01"]
[BlackElo "1926"]
[PlyCount "118"]
[EventDate "2007.01.22"]
[EventType "tourn"]
[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. exd5 exd5 4. Nf3 Bd6 5. Nc3 c6 6. Be2 Ne7 7. 0-0 0-0 8. Bg5 f6 9. Bh4 Nf5 10. Bg3 Nxg3 11. fxg3 Bg4 12. Nh4 Bxe2 13. Qxe2 Qd7 14. Rae1 Na6 15. Qe6+ Qxe6 16. Rxe6 Rad8 17. Nf5 Bc7 18. Re7 Rf7 19. Rfe1 Rd7 20. Rxd7 Rxd7 21. a3 Kf7 22. Ne2 g6 23. Nh4 Re7 24. Kf2 Nb8 25. Nf3 Nd7 26. h4 Nb6 27. b3 Bd6 28. a4 Bc7 29. Nf4 Nc8 30. Nd3 Nd6 31. Rxe7+ Kxe7 32. g4 Ne4+ 33. Ke3 Bg3 34. h5 b6 35. Nd2 Nc3 36. Nb4 Kd6 37. Kd3 Nd1 38. Ke2 Nc3+ 39. Kd3 Nd1 40. Ke2 Nb2 41. Nd3 Nxd3 42. Kxd3 gxh5 43. gxh5 Ke6 44. Ke3 Kf5 45. Kf3 Be1 46. Nb1 Kg5 47. g4 f5 48. gxf5 Kxf5 49. Ke2 Bg3 50. Nd2 Kg5 51. c4 Kxh5 52. cxd5 cxd5 53. Nf3 Kg4 54. Ke3 h5 55. Ke2 h4 56. Nxh4 Bxh4 57. Kd3 Kf4 58. b4 Be1 59. b5 Ba5 0-1

[Event "POL-ch U20"]
[Site "Bialystok"]
[Date "2007.01.22"]
[Round "11.3"]
[White "Wirchanowicz, Magdalena"]
[Black "Sieliwonik, Piotr"]
[Result "0-1"]
[ECO "C02"]
[BlackElo "1926"]
[PlyCount "94"]
[EventDate "2007.01.22"]
[EventType "tourn"]
[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. Nf3 d5 3. e5 c5 4. c3 Nc6 5. d4 Qb6 6. b3 Bd7 7. Be2 Rc8 8. 0-0 cxd4 9. Nxd4 Nxe5 10. Be3 Qd8 11. Nf3 Nxf3+ 12. Bxf3 Nf6 13. Bxa7 b6 14. Qd4 Bc5 15. Qd3 Ra8 16. b4 Rxa7 17. bxc5 bxc5 18. Re1 0-0 19. c4 Bc6 20. Nc3 Rd7 21. cxd5 Nxd5 22. Nxd5 Bxd5 23. Bxd5 Rxd5 24. Qc3 Qa8 25. Re5 Rxe5 26. Qxe5 c4 27. h3 Qa3 28. Qe3 Qb2 29. Qc1 Qd4 30. a4 h6 31. a5 Ra8 32. a6 c3 33. Ra3 Qd2 34. Rxc3 Qxc1+ 35. Rxc1 Rxa6 36. g4 Kh7 37. Kg2 Kg6 38. Rc5 Rd6 39. f3 Rd5 40. Rc7 h5 41. Kg3 hxg4 42. hxg4 e5 43. f4 Rd3+ 44. Kf2 exf4 45. Rc6+ Kg5 46. Rc7 Kxg4 47. Rxf7 g5 0-1

[Event "Suwalki op-C"]
[Site "Suwalki"]
[Date "2000.??.??"]
[Round "?"]
[White "Haber, Kamila"]
[Black "Sieliwonik, Piotr"]
[Result "1-0"]
[ECO "C01"]
[PlyCount "123"]
[EventDate "2000.08.??"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "POL"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. Bd3 Nf6 5. h3 c5 6. dxc5 Bxc5 7. Bg5 Nc6 8. Nc3 Be6 9. Nf3 0-0 10. 0-0 h6 11. Bh4 Re8 12. Bb5 a6 13. Ba4 b5 14. Bb3 d4 15. Bxe6 Rxe6 16. Bxf6 Qxf6 17. Nd5 Qd8 18. Nf4 Re7 19. Nd3 Bb6 20. Qd2 Qd6 21. Qf4 Qxf4 22. Nxf4 Rd7 23. Rad1 Rad8 24. a3 Rd6 25. Rd3 Re8 26. Rfd1 Re4 27. Nh5 Ne5 28. Nxe5 Rxe5 29. Ng3 Rde6 30. Kf1 Ba5 31. b4 Bb6 32. R3d2 Rf6 33. Re1 Rd5 34. Red1 Bc7 35. Ne4 Rf4 36. f3 Bb6 37. Ng3 Rf6 38. Ne4 Rf4 39. Ng3 Rf6 40. Ne2 Rfd6 41. c3 d3 42. Nc1 Be3 43. Rxd3 Rxd3 44. Nxd3 Bb6 45. Ke2 Rg6 46. g4 Re6+ 47. Kd2 Re3 48. Rf1 Re6 49. Re1 Rf6 50. f4 Bc7 51. f5 Rd6 52. Re8+ Kh7 53. Re7 Bd8 54. Rxf7 Bg5+ 55. Kc2 Rc6 56. Nc5 Bf6 57. Ra7 Rc8 58. Rxa6 Re8 59. Ne6 Rc8 60. Nc5 Re8 61. Re6 Ra8 62. Kb3 1-0

[Event "Suwalki op-C"]
[Site "Suwalki"]
[Date "2000.??.??"]
[Round "?"]
[White "Mazurek, Jerzy"]
[Black "Sieliwonik, Piotr"]
[Result "1-0"]
[ECO "C01"]
[PlyCount "59"]
[EventDate "2000.08.??"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "POL"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nf3 Nf6 5. Bd3 c5 6. Qe2+ Be7 7. dxc5 Qa5+ 8. Nc3 Qxc5 9. Be3 Qc7 10. Bd4 Be6 11. Ng5 Qd6 12. Be5 Qb6 13. Rb1 h6 14. Nxe6 fxe6 15. Bb5+ Nc6 16. Bxf6 gxf6 17. Qxe6 d4 18. Bxc6+ bxc6 19. Ne4 Qa5+ 20. c3 dxc3 21. Nd6+ Kd8 22. Nb7+ Ke8 23. Nxa5 c2 24. Qxc6+ Kf7 25. Qxc2 Bb4+ 26. Ke2 Bxa5 27. Qb3+ Kg7 28. Kf3 Rab8 29. Qa4 Bb6 30. Rhe1 1-0

[Event "Suwalki op-C"]
[Site "Suwalki"]
[Date "2000.??.??"]
[Round "?"]
[White "Olchowka, B."]
[Black "Sieliwonik, Piotr"]
[Result "1/2-1/2"]
[ECO "C02"]
[PlyCount "71"]
[EventDate "2000.08.??"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "POL"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 Ne7 4. Nf3 Nf5 5. c3 c5 6. Be2 Nc6 7. 0-0 Qb6 8. dxc5 Bxc5 9. b4 Be7 10. Re1 a6 11. a3 0-0 12. Bb2 Bd7 13. c4 dxc4 14. Bxc4 Rfd8 15. Qb3 Rac8 16. Nc3 Nfd4 17. Nxd4 Nxd4 18. Nd5 exd5 19. Bxd4 Qxd4 20. Bxd5 Rf8 21. Bxb7 Rc3 22. Qb2 Rc4 23. Qxd4 Rxd4 24. Bxa6 Ra8 25. Bb7 Ra7 26. Be4 g6 27. Bc2 Be6 28. Rab1 Rd2 29. Bb3 Bxb3 30. Rxb3 Rd4 31. Reb1 Re4 32. b5 Rxe5 33. b6 Rb7 34. a4 Bd8 35. h3 Kg7 36. g3 1/2-1/2

[Event "Suwalki op-C"]
[Site "Suwalki"]
[Date "2000.??.??"]
[Round "?"]
[White "Sieliwonik, Piotr"]
[Black "Klaczkowski, M."]
[Result "0-1"]
[ECO "E61"]
[PlyCount "72"]
[EventDate "2000.08.??"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "POL"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. Bf4 Bg7 4. e3 d6 5. c4 Nbd7 6. Nc3 0-0 7. Bd3 c5 8. 0-0 cxd4 9. exd4 b6 10. Re1 Bb7 11. Qe2 Re8 12. d5 Nc5 13. Bc2 a5 14. Rab1 Ba6 15. Na4 e6 16. Qd2 Bxc4 17. dxe6 Rxe6 18. Rxe6 Bxe6 19. Qxd6 Qxd6 20. Bxd6 Nxa4 21. Bxa4 Bxa2 22. Re1 Nd5 23. b3 b5 24. Bxb5 Bxb3 25. Nd4 Bxd4 26. Re4 Bg7 27. Re2 a4 28. Be5 Nc3 29. Re3 Nxb5 30. Bxg7 Kxg7 31. h3 a3 32. Re1 a2 33. Ra1 Nd4 34. Kh2 Nc2 35. Rxa2 Rxa2 36. f3 Ne3 0-1

[Event "Suwalki op-C"]
[Site "Suwalki"]
[Date "2000.??.??"]
[Round "?"]
[White "Sieliwonik, Piotr"]
[Black "Lapinska, Malgorzata"]
[Result "0-1"]
[ECO "D35"]
[PlyCount "100"]
[EventDate "2000.08.??"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "POL"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. Bf4 e6 4. c4 Bd6 5. Bxd6 Qxd6 6. e3 0-0 7. Nc3 Nc6 8. Bd3 dxc4 9. Bxc4 a6 10. a3 b5 11. Bd3 Bb7 12. Ne4 Nxe4 13. Bxe4 f5 14. Bc2 Rad8 15. Bb3 Ne7 16. Ng5 Nd5 17. 0-0 h6 18. Nh3 c5 19. Qc2 c4 20. Ba2 Qc6 21. Qe2 Nc3 22. Qf3 Ne4 23. Rfd1 g5 24. Qh5 Rf6 25. f3 Nd6 26. Nxg5 hxg5 27. Qxg5+ Kf7 28. Qh5+ Ke7 29. Qh7+ Rf7 30. Qh4+ Kd7 31. Qf2 Rh8 32. Rac1 Rfh7 33. h3 Rg7 34. Rc2 Rxh3 35. Rcd2 Qc8 36. Kf1 Rh1+ 37. Ke2 Rxd1 38. Rxd1 Qg8 39. Rg1 Rg3 40. Kf1 Bd5 41. Rh1 Rg7 42. Rg1 Rh7 43. Ke1 Qg5 44. Qe2 Qg3+ 45. Qf2 Qxf2+ 46. Kxf2 Nf7 47. Kg3 Rg7+ 48. Kf2 Kd6 49. Rc1 Ng5 50. Rg1 Bxf3 0-1

