[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, Grzegorz1111"]
[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

[Event "Warsaw YMCA Autumn-B 249th"]
[Site "Warsaw"]
[Date "2021.11.04"]
[Round "7"]
[White "Mazurek, Jerzy"]
[Black "Wiktorowski, Janusz"]
[Result "1-0"]
[ECO "C78"]
[WhiteElo "1691"]
[BlackElo "1449"]
[PlyCount "83"]
[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 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 b5 6. Bb3 Bc5 7. a4 Rb8 8. axb5 axb5 9. c3 d6 10. d4 Bb6 11. h3 h6 12. Qe2 Bd7 13. Rd1 0-0 14. Be3 Re8 15. d5 Na5 16. Bc2 Bxe3 17. fxe3 c5 18. b4 cxb4 19. cxb4 Nc4 20. Nbd2 Qb6 21. Nf1 Ra8 22. Bd3 Rac8 23. Rdc1 Rc7 24. Kh2 Rec8 25. Rc2 g5 26. Rca2 Rb7 27. Ra6 Qc7 28. Qf2 Kf8 29. Nxg5 Ke7 30. Nf3 Rg8 31. Bxc4 bxc4 32. Nxe5 c3 33. Nc6+ Bxc6 34. dxc6 d5+ 35. Kg1 Nxe4 36. Qh4+ Rg5 37. cxb7 c2 38. Ra8 c1Q 39. Rxc1 Qxb7 40. Rca1 Kf6 41. Qxh6+ Rg6 42. R1a6+ 1-0

[Event "Warsaw YMCA Autumn-B 249th"]
[Site "Warsaw"]
[Date "2021.10.28"]
[Round "6"]
[White "Jaroszuk, Marcin"]
[Black "Mazurek, Jerzy"]
[Result "1/2-1/2"]
[ECO "E63"]
[WhiteElo "1572"]
[BlackElo "1691"]
[PlyCount "115"]
[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. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. 0-0 0-0 5. c4 d6 6. d4 a6 7. Nc3 Nc6 8. e4 Bg4 9. h3 Bxf3 10. Bxf3 e5 11. dxe5 dxe5 12. Bg5 Qxd1 13. Raxd1 Ne8 14. Rd7 Nd4 15. Bg2 f6 16. Be3 Rf7 17. Rxf7 Kxf7 18. f4 Bh6 19. Bc1 exf4 20. Bxf4 Bxf4 21. gxf4 c6 22. Rd1 Rd8 23. Kf2 Ne6 24. f5 Nd4 25. Ne2 c5 26. Nc3 gxf5 27. exf5 Nd6 28. Bd5+ Kf8 29. Ne4 Nxe4+ 30. Bxe4 b6 31. Re1 Re8 32. b3 Re5 33. Bd3 Rxe1 34. Kxe1 Ke7 35. Kf2 Kd6 36. Kg3 Ke5 37. Kg4 h5+ 38. Kxh5 Nxf5 39. Kg4 Ng7 40. h4 Kd4 41. Bf5 Kc3 42. h5 Nxh5 43. Kxh5 b5 44. Bc8 bxc4 45. bxc4 a5 46. Ba6 a4 47. Bb5 a3 48. Ba4 Kxc4 49. Kg6 Kd3 50. Kxf6 c4 51. Kf5 c3 52. Kf4 c2 53. Bxc2+ Kxc2 54. Ke3 Kb2 55. Kd2 Kxa2 56. Kc2 Ka1 57. Kc1 a2 58. Kc2 1/2-1/2

[Event "Warsaw YMCA Autumn-B 249th"]
[Site "Warsaw"]
[Date "2021.10.14"]
[Round "4"]
[White "Kurowski, Maciej"]
[Black "Mazurek, Jerzy"]
[Result "0-1"]
[ECO "B36"]
[WhiteElo "1590"]
[BlackElo "1691"]
[PlyCount "50"]
[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. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Nf6 6. Nc3 d6 7. Be2 Nxd4 8. Qxd4 Bg7 9. Be3 0-0 10. Qd2 a5 11. 0-0 a4 12. f3 Qa5 13. Rab1 Be6 14. Nd5 Qxd2 15. Nxe7+ Kh8 16. Bxd2 Rfe8 17. Nd5 Nxd5 18. cxd5 Bxd5 19. Bb5 Bxa2 20. Ra1 Bd4+ 21. Kh1 Re5 22. Rxa2 Rxb5 23. Rfa1 Rxb2 24. Rxb2 Bxb2 25. Ra2 a3 0-1

[Event "Warsaw YMCA Autumn-B 249th"]
[Site "Warsaw"]
[Date "2021.10.07"]
[Round "3"]
[White "Sypula, Krzysztof"]
[Black "Mazurek, Jerzy"]
[Result "0-1"]
[ECO "A27"]
[WhiteElo "1656"]
[BlackElo "1691"]
[PlyCount "60"]
[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 e5 2. Nc3 Nc6 3. Nf3 g6 4. d4 exd4 5. Nxd4 Bg7 6. e3 Nxd4 7. exd4 Ne7 8. Bg5 h6 9. Bf4 d6 10. Qd2 g5 11. Be3 Bf5 12. f3 Qd7 13. g4 Bg6 14. Bd3 0-0-0 15. 0-0-0 Kb8 16. d5 Bxd3 17. Qxd3 Ng6 18. Nb5 a6 19. Nd4 Qa4 20. Qb3 Qxb3 21. axb3 Bf6 22. Nf5 h5 23. Bd4 Bxd4 24. Rxd4 Ne5 25. gxh5 Rxh5 26. f4 gxf4 27. Ng7 Rg5 28. Kc2 f3 29. Ne6 fxe6 30. dxe6 Re8 0-1

[Event "Warsaw YMCA Autumn-B 249th"]
[Site "Warsaw"]
[Date "2021.09.28"]
[Round "2"]
[White "Mazurek, Jerzy"]
[Black "Sloniewska, Alicja"]
[Result "0-1"]
[ECO "B19"]
[WhiteElo "1691"]
[BlackElo "1658"]
[PlyCount "84"]
[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 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. h5 Bh7 8. Nf3 Nd7 9. Bd3 Bxd3 10. Qxd3 e6 11. Bd2 Ngf6 12. 0-0-0 Be7 13. Kb1 Qb6 14. Ka1 0-0 15. Ne4 c5 16. c3 cxd4 17. Nxd4 Ne5 18. Nxf6+ Bxf6 19. Qe2 Rac8 20. f4 Nc4 21. Bc1 Rfd8 22. Nf3 Qa5 23. Rxd8+ Qxd8 24. g4 Qa5 25. Rf1 Bxc3 26. bxc3 Qxc3+ 27. Bb2 Nxb2 28. Qxb2 Qd3 29. Rc1 Rxc1+ 30. Qxc1 Qxf3 31. Qc8+ Kh7 32. Qc2+ f5 33. gxf5 Qf1+ 34. Kb2 Qb5+ 35. Ka3 Qxf5 36. Qc4 a6 37. Qc7 Qxh5 38. Qxb7 Qa5+ 39. Kb3 Qb5+ 40. Qxb5 axb5 41. Kb4 h5 42. Kxb5 h4 0-1

[Event "Warsaw YMCA Autumn-B 249th"]
[Site "Warsaw"]
[Date "2021.09.23"]
[Round "1"]
[White "Dropia, Rafal"]
[Black "Mazurek, Jerzy"]
[Result "0-1"]
[ECO "A47"]
[WhiteElo "1621"]
[BlackElo "1691"]
[PlyCount "60"]
[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. d4 Nf6 2. Bf4 b6 3. e3 Bb7 4. Nf3 g6 5. Nc3 Bg7 6. Bd3 c5 7. h3 0-0 8. 0-0 d6 9. Ne2 Nbd7 10. c3 Qc7 11. Nd2 e5 12. Bh2 Rfe8 13. Rc1 Rad8 14. Re1 Nf8 15. e4 exd4 16. cxd4 Nxe4 17. dxc5 bxc5 18. Nxe4 Bxe4 19. b4 Ba8 20. bxc5 Qc6 21. f3 dxc5 22. Qc2 Bh6 23. Rb1 Be3+ 24. Kf1 Qf6 25. Ng1 Qh4 26. g3 Qf6 27. Be2 Rd2 28. Qc4 Bd5 29. Qa6 Qxa6 30. Bxa6 Rf2# 0-1

[Event "Warsaw Maciei Memorial"]
[Site "Warsaw"]
[Date "2021.07.09"]
[Round "1"]
[White "Mazurek, Jerzy"]
[Black "Donchenko, Alexander"]
[Result "0-1"]
[ECO "A10"]
[WhiteElo "1719"]
[BlackElo "2652"]
[PlyCount "78"]
[EventDate "2021.07.09"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. c4 b6 2. Nc3 Bb7 3. e4 e5 4. g3 Nc6 5. Bg2 Bc5 6. Nge2 Nge7 7. d3 d6 8. a3 a5 9. 0-0 h5 10. h4 Nd4 11. Nd5 c6 12. Ne3 a4 13. Nxd4 Bxd4 14. Nc2 Bc5 15. Be3 b5 16. cxb5 cxb5 17. d4 Bb6 18. Nb4 0-0 19. Qd2 Nc6 20. Nxc6 Bxc6 21. d5 Bd7 22. Rac1 Rb8 23. Rc2 b4 24. axb4 Bxe3 25. Qxe3 Rxb4 26. Rfc1 Qb8 27. Qa3 Rb3 28. Qa2 Qb6 29. Bf1 Rxg3+ 30. Kh2 Rg4 31. Be2 Rxh4+ 32. Kg3 Rxe4 33. Bf3 Rb4 34. Rc7 h4+ 35. Kg2 h3+ 36. Kg3 Rd8 37. Qa3 Rb3 38. Qa2 Rxb2 39. Qa3 Qxf2# 0-1

[Event "Warsaw Maciei Memorial"]
[Site "Warsaw"]
[Date "2021.07.09"]
[Round "3"]
[White "Mazurek, Jerzy"]
[Black "Jakubowski, Krzysztof"]
[Result "0-1"]
[ECO "D35"]
[WhiteElo "1719"]
[BlackElo "2497"]
[PlyCount "64"]
[EventDate "2021.07.09"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. c4 e6 2. Nc3 d5 3. d4 Nf6 4. cxd5 exd5 5. Bg5 Nbd7 6. e3 Be7 7. Bd3 0-0 8. Nge2 Re8 9. 0-0 a6 10. Qc2 g6 11. Rad1 Nf8 12. f3 Ne6 13. Bh4 b5 14. a3 Bb7 15. Kh1 c5 16. Qd2 Qb6 17. Bf2 Rad8 18. Bb1 Bf8 19. Ng3 Bh6 20. Qe2 cxd4 21. exd4 Nf4 22. Qc2 Rc8 23. Qb3 Re6 24. Rfe1 Rce8 25. Rxe6 Qxe6 26. h3 N6h5 27. Nxh5 Nxh5 28. Kh2 Bf4+ 29. Kh1 Ng3+ 30. Bxg3 Bxg3 31. a4 Qe1+ 32. Rxe1 Rxe1# 0-1

[Event "Warsaw YMCA Spring-B 241st"]
[Site "Warsaw"]
[Date "2021.06.24"]
[Round "11"]
[White "Nawalaniec, Adam"]
[Black "Mazurek, Jerzy"]
[Result "1-0"]
[ECO "A04"]
[WhiteElo "1639"]
[BlackElo "1720"]
[PlyCount "93"]
[EventDate "2021.04.15"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d3 g6 4. g3 Bg7 5. Bg2 Nc6 6. 0-0 e5 7. c3 Nge7 8. Nbd2 0-0 9. Nb3 b5 10. a4 b4 11. Bd2 Rb8 12. Nc1 h6 13. Ne1 Be6 14. c4 Qd7 15. Rb1 Nd4 16. b3 f5 17. Ne2 Nxe2+ 18. Qxe2 f4 19. d4 fxg3 20. hxg3 exd4 21. Nd3 Nc6 22. f4 Bg4 23. Bf3 Bxf3 24. Qxf3 Ne5 25. Qe2 Nxd3 26. Qxd3 Rbe8 27. Rbe1 Qg4 28. Kg2 Re7 29. Rf2 Rfe8 30. Rfe2 h5 31. Rh1 g5 32. Rhe1 h4 33. Qf3 Qxg3+ 34. Qxg3 hxg3 35. Kxg3 d3 36. Rg2 Rxe4 37. Rxe4 Rxe4 38. Kf3 Re2 39. Rxe2 dxe2 40. fxg5 Be5 41. Kxe2 Kf7 42. Kd3 Ke6 43. Ke4 Bg7 44. g6 Kf6 45. Kd5 Bf8 46. Bf4 Kxg6 47. Bxd6 1-0

[Event "Warsaw YMCA Spring-B 241st"]
[Site "Warsaw"]
[Date "2021.06.17"]
[Round "10"]
[White "Mazurek, Jerzy"]
[Black "Dropia, Rafal"]
[Result "1/2-1/2"]
[ECO "A21"]
[WhiteElo "1720"]
[BlackElo "1576"]
[PlyCount "67"]
[EventDate "2021.04.15"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 f5 3. g3 Nf6 4. Bg2 g6 5. d3 Bg7 6. e4 d6 7. Nge2 c6 8. 0-0 0-0 9. exf5 Bxf5 10. d4 Nbd7 11. b3 Kh8 12. a4 Qc7 13. Ba3 e4 14. h3 g5 15. Qd2 h6 16. Rae1 Rfe8 17. d5 Nc5 18. Nd4 Bd7 19. Bxc5 dxc5 20. Ne6 Bxe6 21. dxe6 Rad8 22. Qc2 Rxe6 23. Nxe4 Nxe4 24. Rxe4 Rxe4 25. Qxe4 Qe5 26. Qg6 Qf6 27. Qh5 Rf8 28. Be4 Qf7 29. Bg6 Qf3 30. g4 Kg8 31. Bc2 Qf7 32. Bg6 Qf3 33. Bc2 Qf7 34. Bg6 1/2-1/2

[Event "Warsaw YMCA Spring-B 241st"]
[Site "Warsaw"]
[Date "2021.05.27"]
[Round "7"]
[White "Mazurek, Jerzy"]
[Black "Dropia, Rafal"]
[Result "0-1"]
[ECO "A36"]
[WhiteElo "1720"]
[BlackElo "1576"]
[PlyCount "100"]
[EventDate "2021.04.15"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. c4 d6 2. Nc3 c5 3. g3 Nc6 4. Bg2 Nf6 5. e4 e5 6. d3 g6 7. Nge2 Bg7 8. 0-0 Bg4 9. f3 Be6 10. Nd5 0-0 11. Nec3 Bxd5 12. exd5 Nd4 13. Be3 h6 14. Qd2 Kh7 15. Rab1 Nd7 16. b4 f5 17. bxc5 Nxc5 18. f4 Rb8 19. fxe5 dxe5 20. Nb5 a6 21. Nxd4 exd4 22. Bf2 b5 23. cxb5 Rxb5 24. Rxb5 axb5 25. Rb1 Qb6 26. Qc2 Rc8 27. Rb4 Rc7 28. Qb1 Rb7 29. Rxd4 Bxd4 30. Bxd4 Qd6 31. Qb4 Ne4 32. Qb3 Nc5 33. Qa3 b4 34. Qa8 Rb8 35. Qa7+ Nd7 36. Qa4 Rc8 37. Qd1 Nf6 38. Qd2 Nxd5 39. Bxd5 Qxd5 40. Qxb4 Rc1+ 41. Kf2 Rc2+ 42. Ke3 Qe6+ 43. Kf3 Qe2+ 44. Kf4 g5+ 45. Kxf5 Qxd3+ 46. Ke5 Re2+ 47. Kd5 Qe4+ 48. Kc4 Qc6+ 49. Kb3 Qc2+ 50. Ka3 Qxa2# 0-1

[Event "Warsaw YMCA Spring-B 241st"]
[Site "Warsaw"]
[Date "2021.05.20"]
[Round "6"]
[White "Sloniewska, Alicja"]
[Black "Mazurek, Jerzy"]
[Result "0-1"]
[ECO "D35"]
[WhiteElo "1614"]
[BlackElo "1720"]
[PlyCount "66"]
[EventDate "2021.04.15"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Be7 4. cxd5 exd5 5. Nf3 Nf6 6. Bg5 c6 7. e3 Bf5 8. Bd3 Bxd3 9. Qxd3 Nbd7 10. 0-0 0-0 11. Rab1 a5 12. b3 Ne4 13. Bxe7 Qxe7 14. Nd2 Rfe8 15. Rfe1 Qh4 16. f3 Qf2+ 17. Kh1 Ng3+ 18. hxg3 Re6 19. Qf5 Rh6+ 20. Qh3 Rxh3+ 21. gxh3 Qxd2 22. Rbc1 Re8 23. e4 Qf2 24. Rf1 Qxg3 25. Rc2 Nf6 26. e5 Nh5 27. Rg2 Qxh3+ 28. Kg1 Nf4 29. Rg4 Re6 30. Kf2 Qh2+ 31. Ke3 Qc2 32. Kxf4 Qxc3 33. Kg3 Rg6 0-1

[Event "Warsaw YMCA Spring-B 241st"]
[Site "Warsaw"]
[Date "2021.05.19"]
[Round "9"]
[White "Mazurek, Jerzy"]
[Black "Safanowski, Tomasz"]
[Result "1-0"]
[ECO "A22"]
[WhiteElo "1720"]
[BlackElo "1749"]
[PlyCount "57"]
[EventDate "2021.04.15"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. c4 d6 2. Nc3 e5 3. g3 Nf6 4. Bg2 Be7 5. e4 0-0 6. Nge2 c6 7. 0-0 Be6 8. d3 d5 9. exd5 cxd5 10. Bg5 Nbd7 11. Nxd5 Bxd5 12. cxd5 Nxd5 13. Bxe7 Nxe7 14. Qa4 Nc5 15. Qa3 Qb6 16. Rac1 Rac8 17. Rc2 Rfd8 18. Rfc1 Nxd3 19. Rxc8 Qxf2+ 20. Kh1 Nxc8 21. Qxd3 Qe1+ 22. Rxe1 Rxd3 23. Nc3 Kf8 24. Rxe5 Rd2 25. Bxb7 Nd6 26. Rd5 Rxb2 27. Rxd6 Rxb7 28. Ra6 Ke7 29. a4 1-0

[Event "Warsaw YMCA Spring-B 241st"]
[Site "Warsaw"]
[Date "2021.05.19"]
[Round "8"]
[White "Nawalaniec, Adam"]
[Black "Mazurek, Jerzy"]
[Result "1/2-1/2"]
[ECO "C56"]
[WhiteElo "1639"]
[BlackElo "1720"]
[PlyCount "118"]
[EventDate "2021.04.15"]
[EventType "swiss"]
[EventRounds "11"]
[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. d4 exd4 4. Bc4 Nf6 5. e5 d5 6. Bb5 Ne4 7. Nxd4 Bc5 8. 0-0 0-0 9. Bxc6 bxc6 10. Be3 Qe8 11. Re1 Bb6 12. f3 Nc5 13. Nc3 Ne6 14. f4 c5 15. Nxe6 fxe6 16. Qf3 Rb8 17. Ne2 d4 18. Bf2 Qg6 19. Rac1 Ba5 20. Rf1 Rxb2 21. Qa3 Rb5 22. Qa4 a6 23. c4 dxc3 24. Nxc3 Bb7 25. Bg3 Rb2 26. Rf2 Rxf2 27. Kxf2 Bb6 28. Qc2 c4+ 29. Kf1 Be3 30. Qxg6 hxg6 31. Rc2 g5 32. Ne2 Bd5 33. Ke1 gxf4 34. Bf2 Bb6 35. Nd4 g5 36. g3 c5 37. Ne2 f3 38. Nc3 Rf5 39. Na4 Rxe5+ 40. Kd1 Ba5 41. Nxc5 Be4 42. Rxc4 Rd5+ 43. Kc1 Bf5 44. g4 Bd3 45. Nxd3 Rxd3 46. Rc5 Rc3+ 47. Rxc3 Bxc3 48. Kc2 Be5 49. h3 Ba1 50. Kd3 Kf7 51. Ke4 Kf6 52. Bg3 Bb2 53. Kxf3 Be5 54. Bf2 Ke7 55. Ke4 Bf6 56. Be3 Kd6 57. a4 Kc6 58. Bf2 Kd6 59. Be3 Kc6 1/2-1/2

[Event "Warsaw YMCA Spring-B 241st"]
[Site "Warsaw"]
[Date "2021.05.14"]
[Round "5"]
[White "Mazurek, Jerzy"]
[Black "Szumigaj, Marcin"]
[Result "1-0"]
[ECO "A17"]
[WhiteElo "1720"]
[BlackElo "1460"]
[PlyCount "93"]
[EventDate "2021.04.15"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 e6 3. Nf3 d5 4. e3 c5 5. cxd5 exd5 6. d4 Be7 7. Bb5+ Bd7 8. Be2 Nc6 9. dxc5 Qa5 10. 0-0 Qxc5 11. Nb5 0-0 12. b3 Nb4 13. Nbd4 Rfc8 14. Bb2 Qb6 15. Ne5 Be8 16. a3 Na6 17. b4 Nc7 18. Bd3 Nb5 19. Nf5 Bf8 20. Qf3 g6 21. Ng4 Nxg4 22. Qxg4 Qe6 23. a4 Nc3 24. Qd4 gxf5 25. Bxc3 Rxc3 26. Qxc3 Bg7 27. Qd2 Bxa1 28. Rxa1 Rc8 29. b5 Rc5 30. Rc1 b6 31. Rxc5 bxc5 32. Qc2 c4 33. Bxf5 Qe5 34. Bxh7+ Kg7 35. g4 Qa1+ 36. Kg2 c3 37. Bd3 a6 38. h4 axb5 39. axb5 Qb2 40. Qxb2 cxb2 41. b6 Bc6 42. Kg3 Kf6 43. Kf4 Bb5 44. Bb1 Bc6 45. g5+ Ke7 46. Ke5 f6+ 47. gxf6+ 1-0

[Event "Warsaw YMCA Spring-B 241st"]
[Site "Warsaw"]
[Date "2021.05.06"]
[Round "4"]
[White "Kuznik, Kamil"]
[Black "Mazurek, Jerzy"]
[Result "0-1"]
[ECO "B34"]
[WhiteElo "1517"]
[BlackElo "1720"]
[PlyCount "42"]
[EventDate "2021.04.15"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Be3 Bg7 6. Nc3 Nf6 7. f3 0-0 8. Qd2 d5 9. 0-0-0 Nxd4 10. Bxd4 dxe4 11. Nxe4 Nxe4 12. fxe4 Bxd4 13. Qxd4 Qa5 14. Kb1 Be6 15. Bc4 Rad8 16. Bd5 Bg4 17. Bxf7+ Kxf7 18. Rhf1+ Kg8 19. Rxf8+ Rxf8 20. Qc4+ Kg7 21. Qd4+ e5 0-1

[Event "Warsaw YMCA Spring-B 241st"]
[Site "Warsaw"]
[Date "2021.04.29"]
[Round "3"]
[White "Mazurek, Jerzy"]
[Black "Kwiek, Janusz"]
[Result "1-0"]
[ECO "A36"]
[WhiteElo "1720"]
[BlackElo "1498"]
[PlyCount "93"]
[EventDate "2021.04.15"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 e6 3. e4 d6 4. g3 c5 5. Bg2 Nc6 6. Nge2 Be7 7. 0-0 Bd7 8. d4 cxd4 9. Nxd4 0-0 10. b3 Nxd4 11. Qxd4 Bc6 12. a4 Qa5 13. Qd2 Qh5 14. Ba3 Rfd8 15. Rfd1 Ng4 16. h3 Ne5 17. Qe3 Ng6 18. Nb5 Bxb5 19. axb5 a6 20. b6 Rab8 21. Rd2 Rd7 22. Rad1 Rbd8 23. f4 Nf8 24. e5 g5 25. exd6 Bf6 26. c5 gxf4 27. gxf4 Ng6 28. c6 bxc6 29. Bxc6 e5 30. Kh2 exf4 31. Qf3 Qxf3 32. Bxf3 Ne5 33. Be4 Bh4 34. Bb2 f6 35. Bxe5 fxe5 36. b7 Rb8 37. Bc6 Rdd8 38. Ra2 Kf7 39. Rxa6 Ke6 40. Ra8 Kf5 41. Rxb8 Rxb8 42. Ra1 e4 43. Ra8 Rxb7 44. Bxb7 f3 45. Bxe4+ Kxe4 46. Kg1 Ke3 47. Kf1 1-0

[Event "Warsaw YMCA Spring-B 241st"]
[Site "Warsaw"]
[Date "2021.04.22"]
[Round "2"]
[White "Kwiecinski, Rafal"]
[Black "Mazurek, Jerzy"]
[Result "1/2-1/2"]
[ECO "C24"]
[WhiteElo "1551"]
[BlackElo "1720"]
[PlyCount "103"]
[EventDate "2021.04.15"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 e5 2. Bc4 Nf6 3. d3 c6 4. Qe2 d5 5. Bb3 a5 6. c3 Bd6 7. Bg5 a4 8. Bc2 h6 9. Bxf6 Qxf6 10. Nd2 0-0 11. Ngf3 Be6 12. h3 Nd7 13. g4 Qe7 14. Rg1 g6 15. h4 b5 16. Qe3 Kg7 17. h5 g5 18. a3 Rfe8 19. Kf1 Nf6 20. Nxg5 hxg5 21. Qxg5+ Kh7 22. exd5 cxd5 23. d4+ e4 24. f3 Nxg4 25. Rxg4 Qxg5 26. Rxg5 Bf4 27. Rg2 Bh3 28. Nxe4 Bxg2+ 29. Kxg2 Kh8 30. Rf1 Rg8+ 31. Kh3 dxe4 32. fxe4 Rg3+ 33. Kh4 Bc7 34. e5 Rag8 35. Bg6 R3xg6 36. hxg6 fxg6 37. Kg4 Kg7 38. Rf6 Re8 39. Rc6 Bxe5 40. dxe5 Rxe5 41. Rb6 g5 42. Kh5 Kf7 43. Kg4 Ke7 44. Kf3 Kd7 45. Rg6 Kc7 46. Kf2 Kb7 47. Kf3 Kc7 48. Kf2 Kb7 49. Kf3 Kc8 50. Rc6+ Kd7 51. Rg6 Ke7 52. Rb6 1/2-1/2

[Event "Warsaw YMCA Spring-B 241st"]
[Site "Warsaw"]
[Date "2021.04.15"]
[Round "1"]
[White "Mazurek, Jerzy"]
[Black "Jaroszuk, Marcin"]
[Result "1-0"]
[ECO "D36"]
[WhiteElo "1720"]
[BlackElo "1583"]
[PlyCount "69"]
[EventDate "2021.04.15"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 c6 6. Qc2 Be7 7. e3 0-0 8. Bd3 Re8 9. Nge2 h6 10. Bh4 Ne4 11. Bxe7 Qxe7 12. Bxe4 dxe4 13. Ng3 f5 14. 0-0 Na6 15. f3 exf3 16. Rxf3 g6 17. Raf1 Be6 18. e4 Bc4 19. Rd1 Nb4 20. Qd2 fxe4 21. Ncxe4 Kg7 22. d5 Bxd5 23. Qd4+ Qe5 24. Qxb4 Bxe4 25. Re3 a5 26. Qxb7+ Re7 27. Qxa8 Qc5 28. Nf1 Bd5 29. Rde1 Bc4 30. Kh1 Rf7 31. Ng3 Rf2 32. Re7+ Bf7 33. Qa7 Qxa7 34. Rxa7 Rxb2 35. Rf1 1-0

[Event "Warsaw YMCA Winter-B 237th"]
[Site "Warsaw"]
[Date "2021.03.25"]
[Round "10"]
[White "Mazurek, Jerzy"]
[Black "Safanowski, Tomasz"]
[Result "1/2-1/2"]
[ECO "D15"]
[WhiteElo "1704"]
[BlackElo "1832"]
[PlyCount "20"]
[EventDate "2021.01.21"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Qb3 a6 5. Bg5 e6 6. Nc3 Nbd7 7. e3 Qa5 8. Rc1 Ne4 9. Bf4 g5 10. Bg3 h5 1/2-1/2

[Event "Warsaw YMCA Winter-B 237th"]
[Site "Warsaw"]
[Date "2021.03.10"]
[Round "8"]
[White "Sloniewska, Alicja"]
[Black "Mazurek, Jerzy"]
[Result "0-1"]
[ECO "D20"]
[WhiteElo "1664"]
[BlackElo "1704"]
[PlyCount "50"]
[EventDate "2021.01.21"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 d5 2. c4 dxc4 3. e4 Nf6 4. Nc3 e5 5. d5 b5 6. Bg5 Bc5 7. Nf3 b4 8. Bxf6 Qxf6 9. Na4 Bd6 10. Bxc4 0-0 11. 0-0 Nd7 12. b3 Qf4 13. Qc2 f5 14. exf5 e4 15. g3 Qxf3 16. Rfe1 Nf6 17. Be2 Qxf5 18. Rad1 Qh3 19. Bf1 Qh5 20. Rd2 Ng4 21. h4 e3 22. fxe3 Bxg3 23. Ree2 Qxh4 24. Nc5 Rxf1+ 25. Kxf1 Qh1# 0-1

[Event "Warsaw YMCA Winter-B 237th"]
[Site "Warsaw"]
[Date "2021.03.04"]
[Round "7"]
[White "Mazurek, Jerzy"]
[Black "Mlynarski, Zbigniew"]
[Result "1-0"]
[ECO "E35"]
[WhiteElo "1704"]
[BlackElo "1568"]
[PlyCount "67"]
[EventDate "2021.01.21"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 exd5 6. Bg5 0-0 7. e3 Bg4 8. Bd3 h6 9. Bh4 Nbd7 10. h3 Be6 11. Nge2 c5 12. 0-0 c4 13. Bf5 Qb6 14. f3 Rfe8 15. Bf2 Re7 16. Ng3 Bd6 17. Bxe6 Rxe6 18. Nf5 Bf8 19. e4 Qc6 20. e5 Nh5 21. Be3 g5 22. g4 Ng7 23. Rad1 Ne8 24. h4 Rg6 25. hxg5 hxg5 26. Rf2 Ng7 27. Rh2 Nxf5 28. gxf5 Rg7 29. f6 Nxf6 30. exf6 Qxf6 31. Rf1 Qe6 32. Nd1 Be7 33. Rh5 g4 34. Qh2 1-0

[Event "Warsaw YMCA Winter-B 237th"]
[Site "Warsaw"]
[Date "2021.02.24"]
[Round "6"]
[White "Leszczynski, Bartosz"]
[Black "Mazurek, Jerzy"]
[Result "1/2-1/2"]
[ECO "A45"]
[WhiteElo "1841"]
[BlackElo "1704"]
[PlyCount "98"]
[EventDate "2021.01.21"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 Nf6 2. Bf4 g6 3. Nc3 d5 4. e3 Bg7 5. h4 a6 6. Be2 h5 7. Nf3 c5 8. Ne5 cxd4 9. exd4 Nc6 10. Qd2 Bf5 11. f3 Rc8 12. g4 hxg4 13. fxg4 Ne4 14. Qe3 Nxc3 15. bxc3 Bxc2 16. h5 Be4 17. 0-0 Bxe5 18. dxe5 Qd7 19. c4 gxh5 20. cxd5 Bxd5 21. gxh5 Nb4 22. Qg3 Qf5 23. Bg4 Qh7 24. Bxc8 Rg8 25. Bg4 Be6 26. Bxe6 Rxg3+ 27. Bxg3 fxe6 28. Rf4 Nd5 29. Rh4 Qh6 30. Rf1 Qg5 31. Rf3 Qh6 32. Kh2 b5 33. Be1 Ne3 34. Bd2 Nf1+ 35. Rxf1 Qxd2+ 36. Kh3 Qe3+ 37. Kg4 Qe4+ 38. Kh3 Qe3+ 39. Kg4 Qe2+ 40. Rf3 Qe4+ 41. Kg3 Qxe5+ 42. Rff4 Qe1+ 43. Kh3 Qh1+ 44. Kg3 Qg1+ 45. Kf3 e5 46. Rfg4 Qf1+ 47. Kg3 Qg1+ 48. Kf3 Qf1+ 49. Kg3 Qg1+ 1/2-1/2

[Event "Warsaw YMCA Winter-B 237th"]
[Site "Warsaw"]
[Date "2021.02.18"]
[Round "5"]
[White "Mazurek, Jerzy"]
[Black "Prus, Marek"]
[Result "1-0"]
[ECO "E71"]
[WhiteElo "1704"]
[BlackElo "1705"]
[PlyCount "79"]
[EventDate "2021.01.21"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. h3 0-0 6. Be3 Na6 7. g4 c5 8. Nge2 Qa5 9. Qd2 cxd4 10. Nxd4 Nc5 11. Bg2 e5 12. Nc2 Qd8 13. 0-0 b6 14. Rfd1 Bb7 15. Bxc5 dxc5 16. Qe3 Qe7 17. Bf3 Rfd8 18. g5 Ne8 19. Nd5 Bxd5 20. cxd5 Nd6 21. Na3 f5 22. gxf6 Bxf6 23. Bg4 Bg5 24. Qe2 h5 25. Be6+ Kg7 26. Nc4 Bf4 27. Nxd6 Qg5+ 28. Kh1 Rxd6 29. Rd3 Kh6 30. Rg1 Qh4 31. Rg2 g5 32. Kg1 Rf8 33. a4 Rf6 34. Bf5 Rf7 35. Qc2 g4 36. hxg4 Rg7 37. Rh3 Qxh3 38. g5+ Rxg5 39. Bxh3 Rdg6 40. Rxg5 1-0

[Event "Warsaw YMCA Winter-B 237th"]
[Site "Warsaw"]
[Date "2021.02.10"]
[Round "4"]
[White "Matyszkiewicz, Wiktor"]
[Black "Mazurek, Jerzy"]
[Result "0-1"]
[ECO "B76"]
[WhiteElo "1794"]
[BlackElo "1704"]
[PlyCount "38"]
[EventDate "2021.01.21"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. f3 Bg7 7. Be3 0-0 8. Qd2 Nc6 9. 0-0-0 d5 10. Nxc6 bxc6 11. Bh6 Be6 12. e5 Nd7 13. h4 Bxe5 14. Bxf8 Nxf8 15. Ne2 Rb8 16. c3 Qa5 17. a3 Bf5 18. Nd4 Qxa3 19. Qc2 Bf4+ 0-1

[Event "Warsaw YMCA Winter-B 237th"]
[Site "Warsaw"]
[Date "2021.02.04"]
[Round "3"]
[White "Mazurek, Jerzy"]
[Black "Jaroszuk, Marcin"]
[Result "0-1"]
[ECO "D35"]
[WhiteElo "1704"]
[BlackElo "1500"]
[PlyCount "144"]
[EventDate "2021.01.21"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 c6 6. e3 Bf5 7. Qf3 Bg6 8. Bxf6 Qxf6 9. Qxf6 gxf6 10. Nf3 Nd7 11. Nh4 Be7 12. g3 Nb6 13. f4 f5 14. Kf2 Nc8 15. Bh3 Bxh4 16. gxh4 Nd6 17. Rhg1 Ke7 18. a4 a5 19. Rgb1 Rhe8 20. b4 Kf6 21. Bf1 Ke7 22. Be2 f6 23. Ra2 Kd7 24. b5 Kc7 25. Rc2 Bf7 26. bxc6 bxc6 27. Nb5+ Kd7 28. Nxd6 Kxd6 29. Rb6 Rec8 30. Ba6 Rc7 31. Bd3 Be6 32. Rc5 Bd7 33. h5 Ke6 34. Be2 Kd6 35. Rb1 Rca7 36. Bf3 Be6 37. Ke2 Bf7 38. Kd3 Be6 39. Rc2 Re7 40. Rcb2 Rae8 41. Rb7 Bd7 42. Re1 Bc8 43. Rxe7 Rxe7 44. h6 Rb7 45. Rg1 Rb3+ 46. Kd2 Rb2+ 47. Kc3 Rxh2 48. Kd3 Ba6+ 49. Kc3 Rh3 50. Bd1 Rxe3+ 51. Kd2 Rd3+ 52. Kc2 Rh3 53. Rg7 Rxh6 54. Ra7 Rh2+ 55. Kc3 Rh3+ 56. Kd2 Bc4 57. Rxa5 h5 58. Ra8 Rd3+ 59. Kc2 Rxd4 60. Bxh5 Rxf4 61. a5 d4 62. a6 Rf2+ 63. Kb1 Kc5 64. Be8 Kb6 65. a7 Bd5 66. Rc8 Be4+ 67. Kc1 Rc2+ 68. Kd1 Kxa7 69. Rc7+ Kb6 70. Rf7 d3 71. Rxf6 Bf3+ 72. Ke1 d2+ 0-1

[Event "Warsaw YMCA Winter-B 237th"]
[Site "Warsaw"]
[Date "2021.01.26"]
[Round "2"]
[White "Tober, Mariusz"]
[Black "Mazurek, Jerzy"]
[Result "1-0"]
[ECO "C54"]
[WhiteElo "1611"]
[BlackElo "1704"]
[PlyCount "77"]
[EventDate "2021.01.21"]
[EventType "tourn"]
[EventRounds "11"]
[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. d3 Bc5 5. Bb3 d6 6. c3 a6 7. Nbd2 Ba7 8. Nf1 h6 9. Ng3 0-0 10. 0-0 Re8 11. h3 Be6 12. Bxe6 Rxe6 13. Nf5 d5 14. Qe2 Ne7 15. N3h4 Nxf5 16. Nxf5 Kh7 17. Qf3 dxe4 18. dxe4 Ng8 19. Be3 Bxe3 20. Nxe3 Qf6 21. Qe2 c6 22. Rad1 b5 23. Rd7 Qg6 24. Nf5 Nf6 25. Rd3 Nh5 26. Qd1 Rg8 27. Kh2 Qg5 28. g3 g6 29. h4 Qf6 30. Ne3 Ng7 31. Ng4 Qe7 32. Rd7 Qe8 33. Qd2 g5 34. hxg5 hxg5 35. Kg2 Rh8 36. Rh1+ Kg6 37. Rd8 Qxd8 38. Qxd8 Rxd8 39. Rh6# 1-0

[Event "Warsaw YMCA Winter-B 237th"]
[Site "Warsaw"]
[Date "2021.01.21"]
[Round "1"]
[White "Mazurek, Jerzy"]
[Black "Haliniak, Wojciech"]
[Result "1-0"]
[ECO "E91"]
[WhiteElo "1704"]
[BlackElo "1779"]
[PlyCount "61"]
[EventDate "2021.01.21"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 6. Nc3 d6 7. e4 g6 8. Bxa6 Nxa6 9. Nf3 Bg7 10. 0-0 0-0 11. Qe2 Qb6 12. Nd2 Nb4 13. Nc4 Qa6 14. a3 Rfb8 15. Rb1 Nd7 16. axb4 Rxb4 17. Nd2 c4 18. Qd1 Nc5 19. Qc2 Qb6 20. Nf3 Rb3 21. Be3 Rb8 22. Na4 Qb4 23. Nxc5 dxc5 24. Nd2 Rxb2 25. Rxb2 Qxb2 26. Qxc4 Bd4 27. Bxd4 cxd4 28. Qd3 Rc8 29. Nf3 Rc1 30. g3 Rc3 31. Qxd4 1-0

[Event "Warsaw YMCA Winter-B 225th"]
[Site "Warsaw"]
[Date "2020.03.05"]
[Round "10"]
[White "Szukalski, Antoni"]
[Black "Mazurek, Jerzy"]
[Result "0-1"]
[ECO "C80"]
[WhiteElo "1752"]
[BlackElo "1672"]
[PlyCount "134"]
[EventDate "2020.01.09"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Nxe4 6. Re1 Nc5 7. Bxc6 dxc6 8. Nxe5 Be6 9. d4 Nd7 10. Nc3 Nxe5 11. dxe5 Qxd1 12. Rxd1 Be7 13. Be3 0-0 14. Rd2 Rfd8 15. Rad1 Rxd2 16. Rxd2 Bb4 17. a3 Bxc3 18. bxc3 Kf8 19. h3 Ke8 20. Kf1 Rd8 21. Ke1 Rxd2 22. Kxd2 Kd7 23. g4 Bc4 24. f4 Ke6 25. Bf2 Bf1 26. h4 Bh3 27. g5 Kd5 28. Bd4 g6 29. e6 Kxe6 30. Be5 Kd7 31. c4 c5 32. Kc3 c6 33. a4 b5 34. a5 Bf1 35. cxb5 cxb5 36. Bb8 Ke6 37. Ba7 Kd5 38. Bb6 b4+ 39. Kb3 Kd4 40. Ba7 Bc4+ 41. Kb2 Be6 42. Bb6 Kc4 43. Bd8 Kb5 44. Bc7 c4 45. c3 b3 46. Kc1 Kc6 47. Be5 Kd5 48. Kb2 Ke4 49. Kc1 Kf3 50. Kb2 Kg4 51. Kc1 Kxh4 52. Kb2 Kh5 53. Bg7 Bf5 54. Kc1 Be6 55. Kb2 Kg4 56. Be5 Bf5 57. Kc1 h5 58. gxh6 g5 59. fxg5 Kxg5 60. Bg7 Bg6 61. Bf8 f5 62. Kd2 f4 63. Ba3 Kxh6 64. Bc1 Kg5 65. Ke2 Kf5 66. Kf3 Bh5+ 67. Kf2 Ke4 0-1

[Event "Warsaw YMCA Winter-B 225th"]
[Site "Warsaw"]
[Date "2020.02.27"]
[Round "9"]
[White "Kasperski, Marcin"]
[Black "Mazurek, Jerzy"]
[Result "0-1"]
[ECO "A24"]
[WhiteElo "1647"]
[BlackElo "1672"]
[PlyCount "90"]
[EventDate "2020.01.09"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. c4 e5 2. g3 Nc6 3. Bg2 g6 4. Nc3 Bg7 5. e4 Nf6 6. Nge2 d6 7. 0-0 0-0 8. d3 Nd4 9. Nxd4 exd4 10. Ne2 Nd7 11. f4 a5 12. f5 g5 13. g4 Be5 14. Bd2 Qf6 15. Rf3 Qg7 16. Rh3 Nf6 17. Ng3 Bxg3 18. hxg3 Nd7 19. Rh5 f6 20. Bf3 Qe7 21. Kg2 Ne5 22. Be2 Bd7 23. Qb3 a4 24. Qxb7 Bc6 25. Qb4 Rfb8 26. Qa3 Nxc4 27. dxc4 Rb3 28. Qxb3 axb3 29. Bf3 Rxa2 30. Re1 Rxb2 31. Re2 d3 32. Rf2 Bxe4 33. Rh2 Rc2 34. Kh3 b2 35. Bxe4 Qxe4 36. Rf1 Rxc4 37. Rhh1 Qxg4+ 38. Kg2 Qe4+ 39. Kh3 Rc2 40. Rh2 b1Q 41. Rxb1 Qxf5+ 42. Kg2 Rxd2+ 43. Kh1 Qf3+ 44. Kg1 Qxg3+ 45. Kf1 Qxh2 0-1

[Event "Warsaw YMCA Winter-B 225th"]
[Site "Warsaw"]
[Date "2020.02.20"]
[Round "8"]
[White "Mazurek, Jerzy"]
[Black "Sloniewska, Alicja"]
[Result "1/2-1/2"]
[ECO "B19"]
[WhiteElo "1672"]
[BlackElo "1683"]
[PlyCount "90"]
[EventDate "2020.01.09"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[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 Ngf6 11. Bd2 e6 12. 0-0-0 Be7 13. Kb1 0-0 14. Ne4 Nxe4 15. Qxe4 Nf6 16. Qe2 Qd5 17. Be3 b5 18. Ne5 Nd7 19. Bd2 Nb6 20. g4 Na4 21. b3 Nb6 22. f4 a5 23. g5 hxg5 24. fxg5 b4 25. g6 f6 26. Nf7 Rxf7 27. gxf7+ Kxf7 28. h6 g6 29. h7 Rh8 30. Bc1 Kg7 31. Qh2 Kf7 32. Qh6 Bf8 33. Qf4 Qd7 34. Bd2 Nd5 35. Qg3 Bd6 36. Qf3 Qa7 37. Be1 a4 38. Qd3 axb3 39. cxb3 c5 40. dxc5 Bxc5 41. Rc1 Be7 42. Bd2 f5 43. Qc4 Qb7 44. Rhe1 Rxh7 45. Qc6 Qxc6 1/2-1/2

[Event "Warsaw YMCA Winter-B 225th"]
[Site "Warsaw"]
[Date "2020.02.14"]
[Round "7"]
[White "Kalejta, Arkadiusz"]
[Black "Mazurek, Jerzy"]
[Result "1/2-1/2"]
[ECO "C83"]
[WhiteElo "1774"]
[BlackElo "1672"]
[PlyCount "58"]
[EventDate "2020.01.09"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. Nbd2 Nc5 10. c3 Be7 11. Bc2 d4 12. Nb3 d3 13. Bb1 Nxb3 14. axb3 Bf5 15. Be3 0-0 16. Nd4 Nxd4 17. cxd4 Qd5 18. Bxd3 Bxd3 19. Qxd3 c5 20. Rfd1 Rfd8 21. Qc3 Rac8 22. h3 b4 23. Qd3 Rc6 24. Rxa6 Rxa6 25. Qxa6 Qxb3 26. Qa1 f6 27. e6 cxd4 28. Rxd4 Rxd4 29. Bxd4 Qxe6 1/2-1/2

[Event "Warsaw YMCA Winter-B 225th"]
[Site "Warsaw"]
[Date "2020.02.13"]
[Round "6"]
[White "Mazurek, Jerzy"]
[Black "Dabrowski, Leszek"]
[Result "1-0"]
[ECO "C88"]
[WhiteElo "1672"]
[BlackElo "1598"]
[PlyCount "35"]
[EventDate "2020.01.09"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[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. h3 Bb7 11. a5 Re8 12. dxe5 Nxe5 13. Nxe5 dxe5 14. Nd2 Nxe4 15. Bxf7+ Kxf7 16. Qf3+ Bf6 17. Nxe4 Kg8 18. Nxf6+ 1-0

[Event "Warsaw YMCA Winter-B 225th"]
[Site "Warsaw"]
[Date "2020.02.06"]
[Round "5"]
[White "Safanowski, Tomasz"]
[Black "Mazurek, Jerzy"]
[Result "1/2-1/2"]
[ECO "D35"]
[WhiteElo "1834"]
[BlackElo "1672"]
[PlyCount "31"]
[EventDate "2020.01.09"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Bf4 Nf6 5. e3 0-0 6. Rc1 Nbd7 7. Qb3 c5 8. Nf3 cxd4 9. exd4 dxc4 10. Bxc4 Nb6 11. 0-0 Nxc4 12. Qxc4 Nd5 13. Nxd5 Qxd5 14. Qxd5 exd5 15. Rfe1 Bb4 16. Re3 1/2-1/2

[Event "Warsaw YMCA Winter-B 225th"]
[Site "Warsaw"]
[Date "2020.01.30"]
[Round "4"]
[White "Mazurek, Jerzy"]
[Black "Potocki, Karol"]
[Result "0-1"]
[ECO "A04"]
[WhiteElo "1672"]
[BlackElo "1845"]
[PlyCount "102"]
[EventDate "2020.01.09"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. e4 e6 2. d3 c5 3. Nf3 Nc6 4. g3 g6 5. Bg2 Bg7 6. 0-0 Nge7 7. c3 0-0 8. Be3 b6 9. d4 cxd4 10. Nxd4 Ba6 11. Re1 Ne5 12. b3 Nd3 13. Bf1 Nc5 14. Bxa6 Nxa6 15. Nd2 Rc8 16. Rc1 Nc5 17. Qe2 e5 18. N4f3 d6 19. Bxc5 dxc5 20. Rcd1 Qc7 21. Nc4 Rfd8 22. Rxd8+ Rxd8 23. Rd1 f6 24. Ne3 Rxd1+ 25. Qxd1 Bh6 26. Nd5 Nxd5 27. Qxd5+ Qf7 28. Kf1 Qxd5 29. exd5 e4 30. Ne1 c4 31. Ke2 cxb3 32. axb3 Kf7 33. c4 Ke7 34. Kd1 Kd6 35. Kc2 f5 36. Kc3 Bg7+ 37. Kd2 Kc5 38. Ng2 b5 39. Ne3 bxc4 40. bxc4 a5 41. Kc2 Bd4 42. h4 a4 43. h5 Bxe3 44. fxe3 gxh5 45. Kc3 h6 46. Kc2 f4 47. exf4 a3 48. f5 a2 49. Kb2 e3 50. f6 e2 51. f7 a1Q+ 0-1

[Event "Warsaw YMCA Winter-B 225th"]
[Site "Warsaw"]
[Date "2020.01.23"]
[Round "3"]
[White "Omar, Mohamed"]
[Black "Mazurek, Jerzy"]
[Result "0-1"]
[ECO "C21"]
[WhiteElo "1834"]
[BlackElo "1672"]
[PlyCount "112"]
[EventDate "2020.01.09"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. e4 e5 2. d4 exd4 3. c3 Qe7 4. Qxd4 Nc6 5. Qe3 Nf6 6. Bd3 d5 7. exd5 Nxd5 8. Qe2 Bg4 9. Qxe7+ Bxe7 10. h3 Bh5 11. Ne2 Ne5 12. Bc2 0-0-0 13. f4 Nc4 14. g3 Rhe8 15. Ba4 c6 16. Rh2 Bg6 17. Nd2 Nce3 18. Nf1 Nxf1 19. Kxf1 Bd3 20. Bd2 Bc5 21. Bb3 f5 22. Re1 Nf6 23. Rd1 Rxe2 24. Rxe2 Re8 25. Rde1 Nh5 26. Kg2 Rxe2+ 27. Rxe2 Bxe2 28. Be6+ Kc7 29. Bxf5 g6 30. Bc2 Nf6 31. a3 Kd6 32. f5 gxf5 33. Bxf5 Ke5 34. Bc2 h5 35. Bf4+ Ke6 36. b4 Bb6 37. Bb3+ Nd5 38. Bd2 Kf5 39. Bc2+ Kf6 40. Be4 Ke5 41. Bg6 a6 42. Bb1 Ba7 43. Bg6 Bd1 44. Bb1 Be3 45. Be1 Nb6 46. g4 hxg4 47. hxg4 Bxg4 48. Bc2 Bf5 49. Bb3 Be4+ 50. Kf1 Bd3+ 51. Kg2 Be4+ 52. Kf1 Bd5 53. Bc2 Bc4+ 54. Kg2 Bc1 55. a4 Nd5 56. Bd1 Ne3+ 0-1

[Event "Warsaw YMCA Winter-B 225th"]
[Site "Warsaw"]
[Date "2020.01.16"]
[Round "2"]
[White "Mazurek, Jerzy"]
[Black "Koziol, Pawel"]
[Result "1/2-1/2"]
[ECO "D36"]
[WhiteElo "1672"]
[BlackElo "1788"]
[PlyCount "64"]
[EventDate "2020.01.09"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 c6 6. e3 Be7 7. Bd3 0-0 8. Qc2 h6 9. Bh4 a5 10. Nge2 Na6 11. a3 Re8 12. 0-0 Ne4 13. Bxe7 Qxe7 14. Rae1 Nc7 15. Na4 Nf6 16. Nb6 Ra7 17. Ng3 Be6 18. f3 Nd7 19. Na4 b5 20. Nc3 Nb6 21. e4 Qh4 22. Qf2 Raa8 23. e5 b4 24. axb4 axb4 25. Nd1 Rf8 26. f4 f5 27. Qc2 Nc4 28. Nxf5 Bxf5 29. Bxf5 Nb5 30. Bh7+ Kh8 31. g3 Qe7 32. Qd3 Nxd4 1/2-1/2

[Event "Warsaw YMCA Winter-B 225th"]
[Site "Warsaw"]
[Date "2020.01.09"]
[Round "1"]
[White "Poniewierski, Piotr"]
[Black "Mazurek, Jerzy"]
[Result "1-0"]
[ECO "A13"]
[WhiteElo "1837"]
[BlackElo "1672"]
[PlyCount "79"]
[EventDate "2020.01.09"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 e6 3. g3 d5 4. Bg2 d4 5. b4 Be7 6. Bb2 0-0 7. Nxd4 Bxb4 8. 0-0 c6 9. Nc2 Bd6 10. d4 Nbd7 11. e4 Ne8 12. e5 Be7 13. Nd2 Qc7 14. Re1 Rb8 15. Rc1 b5 16. d5 cxd5 17. cxd5 exd5 18. Bxd5 Nc5 19. Nb4 Bb7 20. Ne4 Qa5 21. Bc3 Qd8 22. Nxc5 Bxc5 23. Bxb7 Qxd1 24. Rexd1 Rxb7 25. Rd5 Be7 26. Nc6 Ba3 27. Rb1 Rc7 28. Rb3 Rxc6 29. Rxa3 Nc7 30. Rd7 a6 31. Bb4 Rc8 32. Rf3 f6 33. exf6 gxf6 34. Re3 Ne8 35. Ree7 Rc4 36. a3 R4c7 37. Rxe8+ Rxe8 38. Rxc7 Re6 39. Kg2 Re2 40. Rc6 1-0

[Event "Warsaw YMCA Autumn-B 221st"]
[Site "Warsaw"]
[Date "2019.12.12"]
[Round "13"]
[White "Wojnowski, Jan"]
[Black "Mazurek, Jerzy"]
[Result "1-0"]
[ECO "C58"]
[WhiteElo "1676"]
[BlackElo "1662"]
[PlyCount "55"]
[EventDate "2019.09.20"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[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. Bxc6+ Nxc6 10. Qxc6+ Bd7 11. Qc4 0-0 12. Nc3 Nh5 13. Nf3 Rc8 14. Qe4 Bd6 15. d3 Nf6 16. Qe2 Rxc3 17. bxc3 e4 18. dxe4 Nxe4 19. 0-0 Re8 20. Qd3 Bf5 21. Qb5 Bg4 22. Ng5 Re5 23. Qa4 Bd7 24. Qd4 Nxg5 25. Qxd6 f6 26. Bf4 Nf7 27. Qd4 Rh5 28. Rad1 1-0

[Event "Warsaw YMCA Autumn-B 221st"]
[Site "Warsaw"]
[Date "2019.12.04"]
[Round "12"]
[White "Mazurek, Jerzy"]
[Black "Okurowski, Michal"]
[Result "1/2-1/2"]
[ECO "C78"]
[WhiteElo "1662"]
[BlackElo "1645"]
[PlyCount "80"]
[EventDate "2019.09.20"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Bc5 5. 0-0 Nf6 6. Nxe5 Nxe4 7. Qe2 Qe7 8. Qxe4 Nxe5 9. Nc3 Nc6 10. Re1 0-0 11. Nd5 Qxe4 12. Rxe4 Bd6 13. d3 b5 14. Bb3 Bb7 15. Bf4 Na5 16. Bxd6 cxd6 17. Ne7+ Kh8 18. Bd5 Nc6 19. Nf5 g6 20. Nxd6 f5 21. Bxc6 fxe4 22. Bxb7 Rab8 23. Bxe4 Rf6 24. Nb7 Re8 25. g3 b4 26. c4 bxc3 27. bxc3 Rb6 28. c4 Rb2 29. Nc5 d6 30. Nxa6 Re7 31. c5 Ra7 32. cxd6 Rxa6 33. d7 Rd6 34. a4 Rxd7 35. a5 Ra7 36. Kg2 Rf7 37. a6 Rfxf2+ 38. Kg1 Ra2 39. a7 Rxa1+ 40. Kxf2 Rxa7 1/2-1/2

[Event "Warsaw YMCA Autumn-B 221st"]
[Site "Warsaw"]
[Date "2019.11.28"]
[Round "11"]
[White "Mazurek, Jerzy"]
[Black "Ossolinski, Ziemowit"]
[Result "1/2-1/2"]
[ECO "B40"]
[WhiteElo "1662"]
[BlackElo "1802"]
[PlyCount "64"]
[EventDate "2019.09.20"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. g3 Nc6 4. Bg2 Nf6 5. Qe2 d6 6. 0-0 e5 7. h3 Be7 8. c3 h6 9. Rd1 Qb6 10. Na3 Be6 11. d3 0-0 12. Nc2 Qa6 13. b3 Rac8 14. Nd2 Rfe8 15. Ne3 Bf8 16. Nd5 Bxd5 17. exd5 Ne7 18. c4 Nf5 19. Ne4 Nxe4 20. Bxe4 Nd4 21. Qg4 Qa5 22. Bb2 b5 23. Bxd4 exd4 24. h4 bxc4 25. bxc4 Rb8 26. h5 Re5 27. f4 Rxe4 28. dxe4 Qc3 29. Qe2 Rb2 30. Qd3 Qa5 31. a3 Qa4 32. Rdb1 Rc2 1/2-1/2

[Event "Warsaw YMCA Autumn-B 221st"]
[Site "Warsaw"]
[Date "2019.11.21"]
[Round "10"]
[White "Wilczynski, Adam"]
[Black "Mazurek, Jerzy"]
[Result "0-1"]
[ECO "A06"]
[WhiteElo "1574"]
[BlackElo "1662"]
[PlyCount "78"]
[EventDate "2019.09.20"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "POL"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. Nf3 Nf6 2. b3 d5 3. Bb2 h6 4. e3 Bf5 5. Be2 e6 6. d3 Be7 7. Nbd2 0-0 8. 0-0 c5 9. c4 Bh7 10. Re1 Nc6 11. Nf1 dxc4 12. bxc4 Nb4 13. e4 Qb6 14. Qb3 Rfd8 15. Rad1 Nd7 16. Ng3 Bf6 17. Bxf6 Nxf6 18. Rb1 Nd7 19. Qa4 Qc7 20. Qb3 b6 21. d4 Nc6 22. Qe3 cxd4 23. Nxd4 Nxd4 24. Qxd4 Nc5 25. Qe3 Qc6 26. Bf1 Rd7 27. Rbd1 Rad8 28. Rxd7 Qxd7 29. Be2 Qd2 30. Rd1 Qxd1+ 31. Bxd1 Rxd1+ 32. Nf1 Bxe4 33. Qe2 Rb1 34. h3 Bd3 35. Qe5 Rxf1+ 36. Kh2 Rxf2 37. Qb8+ Kh7 38. Qg3 Rxa2 39. Qf3 Be4 0-1

