[Event "Warsaw Najdorf Memorial op-B"]
[Site "Warsaw"]
[Date "2021.07.18"]
[Round "9"]
[White "Mrozinski, Mateusz"]
[Black "Piekos, Piotr"]
[Result "1-0"]
[ECO "C97"]
[WhiteElo "1623"]
[PlyCount "95"]
[EventDate "2021.07.10"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[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. h3 0-0 9. c3 Na5 10. Bc2 c5 11. d4 Qc7 12. d5 Bd7 13. Nbd2 c4 14. Nf1 Rfe8 15. g4 h6 16. Ng3 Kh7 17. Nf5 Bf8 18. Kh2 g6 19. Ng3 Nb7 20. g5 hxg5 21. Nxg5+ Kg8 22. Qf3 Bg7 23. Rg1 a5 24. Nh5 Qd8 25. Nxf6+ Qxf6 26. Qg3 Bh6 27. Qh4 Kg7 28. Ne6+ fxe6 29. Qxh6+ Kf7 30. dxe6+ Bxe6 31. Qh7+ Qg7 32. Qxg7+ Kxg7 33. f4 Kf7 34. f5 gxf5 35. exf5 Bd7 36. Be3 d5 37. Rg6 Rac8 38. Rag1 Rg8 39. h4 Rh8 40. Rg7+ Ke8 41. Bg5 Rc7 42. Re7+ Kf8 43. Rxe5 Bc6 44. Rge1 b4 45. Kg3 bxc3 46. bxc3 Rd7 47. Re8+ Kg7 48. f6+ 1-0

[Event "Warsaw Najdorf Memorial op-B"]
[Site "Warsaw"]
[Date "2021.07.16"]
[Round "7"]
[White "Janik, Marcin1111"]
[Black "Piekos, Piotr"]
[Result "1/2-1/2"]
[ECO "E65"]
[WhiteElo "1705"]
[PlyCount "107"]
[EventDate "2021.07.10"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. g3 0-0 5. Nc3 d6 6. Bg2 Nbd7 7. 0-0 c5 8. e3 Rb8 9. b3 a6 10. a4 b6 11. Bb2 Qc7 12. d5 e6 13. dxe6 fxe6 14. Ra2 Bb7 15. Bh3 Rfe8 16. Ng5 Qc6 17. e4 Nf8 18. Bg2 h6 19. Nh3 g5 20. f4 g4 21. Nf2 h5 22. Ba1 Rbd8 23. Rd2 Ng6 24. h3 gxh3 25. Nxh3 Qc7 26. Qe2 d5 27. e5 Ng4 28. cxd5 exd5 29. Nxd5 Bxd5 30. Bxd5+ Kh8 31. Rfd1 N6xe5 32. fxe5 Bxe5 33. Bxe5+ Rxe5 34. Be4 Rde8 35. Rd7 Rxe4 36. Qxe4 Qxd7 37. Rxd7 Rxe4 38. Rd6 Rb4 39. Rd3 b5 40. axb5 axb5 41. Nf4 c4 42. bxc4 bxc4 43. Rc3 Nf6 44. Ng6+ Kg7 45. Ne5 Ne4 46. Rxc4 Rxc4 47. Nxc4 Nxg3 48. Ne3 Kg6 49. Kg2 Ne4 50. Kh3 Kg5 51. Ng2 Nd6 52. Nh4 Ne4 53. Ng2 Nf6 54. Nh4 1/2-1/2

[Event "Warsaw Najdorf Memorial op-B"]
[Site "Warsaw"]
[Date "2021.07.14"]
[Round "5"]
[White "Michalowski, Patryk"]
[Black "Piekos, Piotr"]
[Result "1-0"]
[ECO "C77"]
[WhiteElo "1770"]
[PlyCount "57"]
[EventDate "2021.07.10"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Nc3 b5 6. Bb3 Bb4 7. Nd5 Ba5 8. 0-0 0-0 9. d3 h6 10. a4 d6 11. Nxf6+ Qxf6 12. Bd5 Bd7 13. c3 Bb6 14. Be3 Rac8 15. axb5 axb5 16. Bxb6 cxb6 17. Ra6 Ne7 18. Rxb6 Ng6 19. Re1 Nf4 20. Re3 Rc5 21. Bb3 Bg4 22. d4 exd4 23. Qxd4 Ra8 24. Qxf6 Bxf3 25. Qxf7+ Kh7 26. Re1 Ne2+ 27. Kf1 Bxe4 28. Kxe2 Bxg2 29. Rg1 1-0

[Event "Warsaw Najdorf Memorial op-B"]
[Site "Warsaw"]
[Date "2021.07.13"]
[Round "4"]
[White "Piekos, Piotr"]
[Black "Wilgosz, Jan"]
[Result "1-0"]
[ECO "C88"]
[BlackElo "1561"]
[PlyCount "83"]
[EventDate "2021.07.10"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[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. h3 Bb7 9. d3 d5 10. exd5 Nxd5 11. Nxe5 Nxe5 12. Rxe5 Qd6 13. Re1 Rae8 14. Nd2 Qg6 15. Qf3 Nf4 16. Qxb7 Nxh3+ 17. Kf1 Nxf2 18. Rxe7 Rxe7 19. Kxf2 Qf6+ 20. Nf3 Rfe8 21. Bg5 Re2+ 22. Kf1 Qf5 23. Qd5 Qg4 24. Nd4 R2e5 25. Qxf7+ Kh8 26. Bf4 R5e7 27. Qf5 Qh4 28. Nf3 Qh1+ 29. Ng1 Qh4 30. Bd2 Re5 31. Qf2 Qd8 32. Re1 Rf8 33. Nf3 Rh5 34. Bc3 c5 35. Qe3 Qh4 36. Ke2 Qg3 37. Kd1 b4 38. Qe7 Rhf5 39. Be6 Qxg2 40. Bxf5 Qxf3+ 41. Kc1 Qf4+ 42. Kb1 1-0

[Event "Warsaw Najdorf Memorial op-B"]
[Site "Warsaw"]
[Date "2021.07.12"]
[Round "3"]
[White "Dudek, Radoslaw"]
[Black "Piekos, Piotr"]
[Result "0-1"]
[ECO "C58"]
[WhiteElo "1490"]
[PlyCount "92"]
[EventDate "2021.07.10"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Qf3 Be7 9. b4 Bxb4 10. Bxc6+ Nxc6 11. Qxc6+ Bd7 12. Qc4 Qe7 13. 0-0 Rc8 14. Qb3 0-0 15. Ba3 Bc5 16. Re1 Bc6 17. Qg3 Nh5 18. Bxc5 Qxc5 19. Qh4 Qd5 20. Nf3 Nf4 21. Rxe5 Nxg2 22. Rxd5 Nxh4 23. Nxh4 Bxd5 24. Nc3 Be6 25. Rc1 Rfd8 26. Ne4 Bxa2 27. Nf5 Kf8 28. Ne3 Be6 29. c3 Ke7 30. Nf1 Bc4 31. Neg3 a5 32. Ra1 Ra8 33. Ne3 Bd3 34. f4 g6 35. Kf2 a4 36. Ne2 a3 37. Nd4 Be4 38. Nc4 a2 39. Ke3 Bd5 40. Nb6 Ra6 41. Nxd5+ Rxd5 42. Nc2 Re6+ 43. Kf3 Rd3+ 44. Kg4 Re2 45. Rxa2 Rg2+ 46. Kh4 Rxh2+ 0-1

