[Event "PK LSB groep A"]
[Site "Leiden"]
[Date "2026.06.08"]
[Round "4"]
[White "Pijpers, Arthur"]
[Black "Margaryan, Artur"]
[Result "1-0"]
[ECO "B43"]
[WhiteElo "2483"]
[BlackElo "2134"]
[PlyCount "53"]
[EventDate "2026.??.??"]
[EventCountry "NED"]

1. e4 c5 2. Nf3 e6 3. Nc3 a6 4. d4 cxd4 5. Nxd4 Qc7 6. Bd3 Nc6 7. Nxc6 dxc6 8. O-O e5 9. f4 Nf6 10. Qe1 Bd6 11. a4 h6 12. Kh1 b6 13. Nd1 Rb8 14. Ne3 b5 15. axb5 axb5 16. f5 Bb7 17. Bd2 O-O 18. Qh4 Qe7 19. Rf3 Kh8 20. Raf1 Rfd8 21. Ng4 Nxg4 22. f6 Qd7 23. Rg3 Bf8 24. Rxg4 Qe6 25. Rxg7 Bxg7 26. Bxh6 Bxf6 27. Bg5+ 1-0

[Event "PK LSB groep A"]
[Site "Leiden"]
[Country "Nederland"]
[Date "2026.06.08"]
[Round "4"]
[White "De Weerd, Just"]
[Black "Brienen, Jacob"]
[Result "1/2-1/2"]
[WhiteElo "1975"]
[BlackElo "2140"]
[PlyCount "51"]
[EventDate "2026.??.??"]

1. d4 Nf6 2. c4 e6 3. g3 d5 4. Nf3 dxc4 5. Bg2 a6 6. a4 Nc6 7. O-O Rb8 8. Qc2
b5 9. axb5 axb5 10. b3 Nxd4 11. Nxd4 Qxd4 12. Bb2 Qc5 13. Rc1 Be7 14. bxc4 O-O
15. cxb5 Qxc2 16. Rxc2 Rxb5 17. Na3 Rc5 18. Rxc5 Bxc5 19. Rc1 Bb6 20. Nc4 Bd7
21. Ne5 Bb5 22. e3 Rd8 23. Bf3 Nd5 24. Nc4 Nb4 25. Nxb6 cxb6 26. Bd4 1/2-1/2

[Event "PK LSB groep A"]
[Site "Leiden"]
[Date "2026.06.08"]
[Round "4"]
[White "Van der Marel, Lambertus"]
[Black "Timmermans, Raymond"]
[Result "1-0"]
[WhiteElo "2030"]
[BlackElo "2031"]
[PlyCount "175"]
[EventDate "2026.??.??"]

1. d4 d5 2. c4 dxc4 3. Nf3 a6 4. a4 Nc6 5. e3 e5 6. Bxc4 e4 7. Nfd2 Qg5 8. Nxe4 Qxg2 9. Ng3 Nf6 10. Bf1 Qd5 11. Nc3 Bb4 12. Bd2 Qa5 13. Bg2 Bg4 14. Qc2 O-O-O 15. O-O h5 16. h3 Be6 17. Rfc1 h4 18. Nge2 g5 19. Ne4 Bf5 20. Bxb4 Nxb4 21. Qc5 Qxc5 22. Nxc5 b6 23. Bb7+ Kb8 24. Nxa6+ Kxb7 25. Nxb4 Bxh3 26. a5 bxa5 27. Rxa5 Bg4 28. Rb5+ Kc8 29. Na6 Ne8 30. Nc3 Bf3 31. Kh2 g4 32. Nc5 Rd6 33. e4 Rxd4 34. Ra1 Kd8 35. Nd5 Rxd5 36. exd5 Ke7 37. Re1+ Kd6 38. Ne4+ Bxe4 39. Rxe4 Nf6 40. Rc4 Nxd5 41. Rxg4 c6 42. Rb7 f5 43. Rc4 Rh6 44. b4 Ke5 45. b5 cxb5 46. Rxb5 Rh8 47. Ra4 Ke6 48. Ra6+ Ke5 49. f4+ Kxf4 50. Rxd5 Kg4 51. Rg6+ Kf4 52. Rf6 Rh5 53. Kh3 Ke4 54. Ra5 Kf4 55. Rf8 Rg5 56. Ra4+ Ke5 57. Rxh4 Rg1 58. Kh2 Rg7 59. Re8+ Kd5 60. Rh5 Rg6 61. Rxf5+ Kd4 62. Rf7 Kd5 63. Rd7+ Kc6 64. Rd1 Kc7 65. Re3 Rc6 66. Rdd3 Rg6 67. Rg3 Rf6 68. Kg2 Rh6 69. Kf2 Rh5 70. Ke2 Kc6 71. Kd2 Rh2+ 72. Kc3 Rh6 73. Rg4 Rh1 74. Rc4+ Kb5 75. Rd5+ Kb6 76. Kb2 Rh2+ 77. Rc2 Rh3 78. Rd1 Rh5 79. Rb1 Ra5 80. Rc3 Kb7 81. Kc1+ Ka7 82. Rbb3 Rh5 83. Rc2 Rh1+ 84. Kd2 Rh2+ 85. Kc3 Rh3+ 86. Kb2 Rh6 87. Ka1 Rh1+ 88. Rb1 1-0

[Event "PK LSB groep A"]
[Site "Leiden"]
[Date "2026.06.08"]
[Round "4"]
[White "Van der Bent, Gideon"]
[Black "Cortenbach, Stan"]
[Result "1-0"]
[WhiteElo "1988"]
[BlackElo "1949"]
[PlyCount "73"]
[EventDate "2026.??.??"]

1. d4 f5 2. g3 Nf6 3. Bg2 e6 4. Nh3 Be7 5. O-O O-O 6. c4 d6 7. Nc3 e5 8. d5 a5 9. f3 Qe8 10. e4 Na6 11. Be3 fxe4 12. Nxe4 Bf5 13. Qd2 Qg6 14. Nhf2 b6 15. Ng5 Nc5 16. Bxc5 bxc5 17. Ne6 Bxe6 18. dxe6 Ra6 19. f4 exf4 20. Qxf4 Qc2 21. b3 Nd5 22. Qe4 Nb4 23. Qb7 Bf6 24. Ne4 Bd4+ 25. Kh1 Raa8 26. Rac1 Qxa2 27. e7 Rfe8 28. Qxc7 Nd3 29. Qxd6 h6 30. Rcd1 Qe2 31. Bf3 Qe3 32. Qd5+ Kh8 33. Bh5 Ne5 34. Nd6 g6 35. Rde1 Qg5 36. Rxe5 Qxe5 37. Nf7+ 1-0

[Event "PK LSB groep A"]
[Site "Leiden"]
[Date "2026.06.08"]
[Round "4"]
[White "Veenendaal, Loek"]
[Black "Passenier, Peter"]
[Result "0-1"]
[WhiteElo "1962"]
[BlackElo "2004"]
[PlyCount "86"]
[EventDate "2026.??.??"]

1. d4 Nf6 2. Nf3 g6 3. Nbd2 Bg7 4. e4 O-O 5. Bd3 d6 6. O-O Nbd7 7. Re1 e5 8. c3 Re8 9. a4 a5 10. b3 d5 11. Ba3 dxe4 12. Nxe4 exd4 13. cxd4 Nxe4 14. Rxe4 Rxe4 15. Bxe4 Nf6 16. Qd3 Nxe4 17. Qxe4 Be6 18. b4 Bd5 19. Qf4 axb4 20. Bxb4 Bxf3 21. gxf3 Qxd4 22. Qxd4 Bxd4 23. Ra3 c5 24. Bc3 Bxc3 25. Rxc3 b6 26. Rc4 Kf8 27. Kf1 Ke7 28. Ke2 Kd6 29. Kd3 Re8 30. Rh4 h5 31. Kc4 Kc6 32. Re4 Rxe4+ 33. fxe4 g5 34. h3 h4 35. f3 f6 36. Kd3 b5 37. axb5+ Kxb5 38. Ke3 c4 39. f4 gxf4+ 40. Kxf4 c3 41. Ke3 Kc4 42. e5 fxe5 43. Ke2 Kb3 0-1

[Event "PK LSB groep A"]
[Site "Leiden"]
[Date "2026.06.08"]
[Round "4"]
[White "Veldhuyzen, Ywein"]
[Black "Wooter, Robin"]
[Result "0-1"]
[WhiteElo "1925"]
[BlackElo "2089"]
[PlyCount "74"]
[EventDate "2026.??.??"]

1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. Bg5 dxc4 5. Bxf6 exf6 6. e4 b5 7. Be2 Bb4+ 8. Nc3 O-O 9. O-O Re8 10. Qc2 Bb7 11. Rfd1 Qe7 12. Nd2 Nd7 13. Bf3 Nb6 14. Nf1 Rad8 15. Ne3 g6 16. d5 Bc5 17. dxc6 Bxc6 18. Ned5 Bxd5 19. Nxd5 Nxd5 20. exd5 Bd6 21. g3 Rc8 22. Rd4 f5 23. Rad1 Qf6 24. R4d2 a5 25. Re2 Rxe2 26. Bxe2 Bc5 27. Qd2 Qb6 28. Bf1 Bd6 29. Rc1 Be5 30. Qe2 Re8 31. Kh1 Re7 32. Re1 Bf6 33. Qd2 Rxe1 34. Qxe1 Bxb2 35. f4 Qd4 36. Qe8+ Kg7 37. Qxb5 Qe4+ 0-1

[Event "PK LSB groep A"]
[Site "Leiden"]
[Date "2026.06.08"]
[Round "4"]
[White "Prijs, Xander"]
[Black "Margaryan, Aren"]
[Result "0-1"]
[WhiteElo "1914"]
[BlackElo "2043"]
[PlyCount "92"]
[EventDate "2026.??.??"]

1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 e6 6. Bc4 Bc5 7. O-O Nge7 8. Ng5 Ne5 9. Bb3 h6 10. Na4 Bb4 11. Bf4 N5g6 12. Nxf7 Kxf7 13. Bd6 Bxd6 14. Qxd6 Nc6 15. f4 Qe7 16. Qd3 Ke8 17. f5 Nge5 18. Qe2 h5 19. Rad1 b6 20. Nc3 a6 21. Kh1 Bb7 22. Na4 b5 23. Nc3 Qc5 24. fxe6 dxe6 25. Qe1 Nd4 26. Qg3 Ng4 27. h3 Nxb3 28. axb3 Ke7 29. Rc1 Qe5 30. Rf4 Raf8 31. Rxg4 Qxg3 32. Rxg3 Rf7 33. Re3 Rc8 34. Kg1 b4 35. Ne2 Rxc1+ 36. Nxc1 Kd6 37. Nd3 a5 38. Re1 Ba6 39. Rd1 Bxd3 40. Rxd3+ Ke5 41. Rd1 Kxe4 42. Re1+ Kd3 43. Rxe6 Kc2 44. Re2+ Kxb3 45. Kh2 Rc7 46. Re5 a4 0-1

[Event "PK LSB groep A"]
[Site "Leiden"]
[Country "Nederland"]
[Date "2026.06.08"]
[Round "4"]
[White "Verhoeff, Timardi"]
[Black "Schenkelaars, Robin"]
[Result "1-0"]
[WhiteElo "1921"]
[BlackElo "1961"]
[PlyCount "45"]
[EventDate "2026.??.??"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Nf6 6. Nc3 Nxd4 7. Qxd4 d6 8.
Be2 Bg7 9. Be3 O-O 10. Qd2 a5 11. f3 a4 12. O-O Qa5 13. b4 axb3 14. axb3 Qxa1
15. Rxa1 Rxa1+ 16. Kf2 Be6 17. Bd4 Rh1 18. h3 Ra8 19. g4 Ra3 20. Nd1 Rxh3 21.
Kg2 Bxg4 22. Bxf6 Bxf6 23. Nf2 1-0

[Event "PK LSB groep A"]
[Site "Leiden"]
[Date "2026.06.08"]
[Round "4"]
[White "Morssink, Pieter Jan"]
[Black "Muilwijk, Marco"]
[Result "1-0"]
[WhiteElo "1955"]
[BlackElo "1884"]
[PlyCount "121"]
[EventDate "2026.??.??"]

1. Nf3 d6 2. g3 e5 3. Bg2 f5 4. d3 Nf6 5. e4 Be7 6. O-O O-O 7. c3 Kh8 8. Nbd2 fxe4 9. dxe4 Qe8 10. Re1 Qh5 11. Nc4 Bh3 12. Bxh3 Qxh3 13. Ng5 Qd7 14. Kg2 h6 15. Nf3 Qc6 16. Qe2 Qe8 17. Ne3 Nbd7 18. Nf5 Nc5 19. Nxe7 Qxe7 20. Nh4 Qf7 21. f3 Ne6 22. Kh1 Rae8 23. Be3 a6 24. a4 Kh7 25. Rf1 g5 26. Nf5 Ng7 27. g4 Nxf5 28. exf5 Kg7 29. Rae1 Nd5 30. Qc4 Nxe3 31. Qxf7+ Kxf7 32. Rxe3 Kf6 33. Kg2 h5 34. a5 d5 35. Ra1 c5 36. Rd1 Rd8 37. Red3 d4 38. cxd4 cxd4 39. Rb3 Rf7 40. Rb6+ Kg7 41. Re6 Rd5 42. Re1 Rxa5 43. R1xe5 Rxe5 44. Rxe5 hxg4 45. fxg4 Rc7 46. Kf3 Kf6 47. Re6+ Kf7 48. Rb6 Re7 49. Rd6 Re3+ 50. Kf2 Rb3 51. Rxd4 Rxb2+ 52. Kf3 b5 53. Rd7+ Kf6 54. Rd6+ Kf7 55. Rxa6 Rxh2 56. Rb6 Rh3+ 57. Ke4 Rh4 58. Ke5 Rxg4 59. Rb7+ Ke8 60. Kf6 Rc4 61. Kg7 1-0

[Event "PK LSB groep A"]
[Site "Leiden"]
[Country "Nederland"]
[Date "2026.06.08"]
[Round "4"]
[White "Van der Knaap, Jan"]
[Black "Van der Maat, Niek"]
[Result "1/2-1/2"]
[WhiteElo "1881"]
[BlackElo "1881"]
[PlyCount "48"]
[EventDate "2026.??.??"]

1. e4 d6 2. d4 Nf6 3. Nc3 c6 4. f4 Qb6 5. Nf3 Bg4 6. Be2 Bxf3 7. Bxf3 e5 8.
fxe5 dxe5 9. dxe5 Nfd7 10. b3 Nxe5 11. Qd2 Nbd7 12. Bb2 O-O-O 13. Na4 Qc7 14.
O-O-O Be7 15. Qe2 b5 16. Nc3 Qa5 17. Bg4 Ba3 18. Bxa3 Qxa3+ 19. Kb1 Qb4 20.
Bxd7+ Rxd7 21. Rxd7 Nxd7 22. Kb2 Ne5 23. a3 Qe7 24. Rd1 Rd8 1/2-1/2

[Event "PK LSB groep A"]
[Site "Leiden"]
[Date "2026.06.08"]
[Round "4"]
[White "Kumar, Dhruv"]
[Black "Molenkamp, Jan Bertus"]
[Result "1/2-1/2"]
[WhiteElo "1869"]
[BlackElo "1867"]
[PlyCount "118"]
[EventDate "2026.??.??"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nf3 Bd6 5. Bd3 Ne7 6. O-O Bf5 7. Bxf5 Nxf5 8. Re1+ Ne7 9. Nc3 c6 10. Be3 O-O 11. Qd2 Nd7 12. Ne2 Nf5 13. Bf4 Qc7 14. Bxd6 Qxd6 15. Qf4 g6 16. g4 Qxf4 17. Nxf4 Ng7 18. Re7 Rad8 19. Ne5 Nxe5 20. dxe5 Rfe8 21. Rxb7 Rxe5 22. Rxa7 Re4 23. Ng2 Rxg4 24. a4 Nf5 25. h3 Rc4 26. a5 Rxc2 27. a6 Rxb2 28. Rc7 Rb6 29. a7 Ra8 30. Nf4 Nd4 31. Nd3 Ne6 32. Rd7 f6 33. Re1 c5 34. Nxc5 Nxc5 35. Rde7 Ne6 36. R1xe6 Rxe6 37. Rxe6 Rxa7 38. Rd6 Ra5 39. Rxf6 d4 40. Rd6 Ra1+ 41. Kg2 Rd1 42. Rd7 d3 43. h4 h6 44. Kh2 Kf8 45. Kg2 Ke8 46. Rd4 Kf7 47. Kf3 Kf6 48. Ke3 Ke5 49. Re4+ Kf5 50. Rf4+ Ke5 51. Re4+ Kf6 52. Rf4+ Kg7 53. Rd4 g5 54. hxg5 hxg5 55. Rxd3 Re1+ 56. Kf3 Kg6 57. Re3 Rg1 58. Ke4 Rg4+ 59. Kf3 Rg1 1/2-1/2

[Event "PK LSB groep A"]
[Site "Leiden"]
[Date "2026.06.08"]
[Round "4"]
[White "Van der Scheer, Henk"]
[Black "Kurtoglu, Devrim"]
[Result "1/2-1/2"]
[WhiteElo "1939"]
[BlackElo "1850"]
[PlyCount "138"]
[EventDate "2026.??.??"]

1. e4 c5 2. Nf3 d6 3. Bc4 e6 4. Nc3 Ne7 5. d4 cxd4 6. Nxd4 Nec6 7. O-O Nxd4 8. Qxd4 a6 9. a4 Nc6 10. Qd1 Be7 11. Be3 O-O 12. Qd2 Qc7 13. Rfd1 Rd8 14. Bf1 Bd7 15. Ne2 a5 16. Nd4 Nxd4 17. Bxd4 e5 18. Be3 Be6 19. c4 Bf8 20. b3 f6 21. f3 Rdc8 22. Qf2 Ra6 23. Rab1 Qf7 24. Rb2 Raa8 25. Rbd2 Qc7 26. Rd3 Qc6 27. h4 h6 28. Kh2 Be7 29. g3 f5 30. Bh3 Rf8 31. Qg2 Qc8 32. exf5 Bxf5 33. Bxf5 Qxf5 34. f4 exf4 35. Bxf4 Rae8 36. Qd5+ Qxd5 37. Rxd5 b6 38. Kh3 Kh7 39. Bxd6 Bxd6 40. Rxd6 Re3 41. R1d3 Rxd3 42. Rxd3 Rf6 43. Kg2 Kg6 44. Rd5 Kf7 45. Rb5 Rd6 46. Kf3 Ke7 47. Ke4 Rg6 48. Kf4 Kd7 49. c5 bxc5 50. Rxa5 Rb6 51. Ra7+ Ke8 52. Rxg7 Rxb3 53. Rc7 Rb4+ 54. Kf5 Rxa4 55. Rxc5 Ra6 56. Rc7 Kf8 57. g4 Kg8 58. Re7 Ra5+ 59. Kg6 Ra6+ 60. Kh5 Rb6 61. Rc7 Ra6 62. g5 hxg5 63. hxg5 Rb6 64. Rc8+ Kg7 65. Rc7+ Kg8 66. Ra7 Rc6 67. g6 Rc1 68. Ra8+ Kg7 69. Ra7+ Kg8 1/2-1/2

[Event "PK LSB groep A"]
[Site "Leiden"]
[Date "2026.06.08"]
[Round "4"]
[White "Beijen, Mark"]
[Black "Hensbergen, Willem"]
[Result "1-0"]
[WhiteElo "1953"]
[BlackElo "2062"]
[PlyCount "57"]
[EventDate "2026.??.??"]

1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. e4 Be7 6. Bd3 O-O 7. Nge2 Ne8 8. Be3 g6 9. Qd2 Ng7 10. O-O-O f5 11. exf5 Nxf5 12. Ne4 a6 13. Bg5 b5 14. h4 Nd7 15. h5 Nb6 16. hxg6 hxg6 17. Bxe7 Qxe7 18. g4 bxc4 19. Bb1 Nd4 20. Nxd4 cxd4 21. Rh6 Rf7 22. Rdh1 Rg7 23. Rh8+ Kf7 24. Qh6 Nxd5 25. Ng5+ Kf6 26. Nh7+ Ke6 27. Bf5+ Kf7 28. Bxg6+ Rxg6 29. Rf8+ 1-0

[Event "PK LSB groep A"]
[Site "Leiden"]
[Date "2026.06.08"]
[Round "4"]
[White "Wagemans, Ed"]
[Black "Van Briemen, Willem"]
[Result "0-1"]
[ECO "C78"]
[WhiteElo "1857"]
[BlackElo "1973"]
[PlyCount "54"]
[EventDate "2026.??.??"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Bc5 6. d3 b5 7. Bb3 d6 8. Bg5 h6 9. Bh4 g5 10. Bg3 Na5 11. Nbd2 Nxb3 12. Nxb3 Bb6 13. d4 Nxe4 14. dxe5 Nxg3 15. hxg3 g4 16. Nh4 dxe5 17. Qe2 Qg5 18. Nd2 O-O 19. Rfe1 Be6 20. Rad1 Rad8 21. Kh2 f6 22. Ne4 Qg7 23. f3 Bc4 24. Nxf6+ Qxf6 25. Qe4 gxf3 26. gxf3 Rd4 27. Qxe5 Qxe5 0-1

[Event "PK LSB groep A"]
[Site "Leiden"]
[Country "Nederland"]
[Date "2026.06.08"]
[Round "4"]
[White "Van Veen, Kylian"]
[Black "Scherpenisse, Kees"]
[Result "1-0"]
[WhiteElo "1906"]
[BlackElo "1910"]
[PlyCount "45"]
[EventDate "2026.??.??"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nd4 4. Nxd4 exd4 5. Bc4 d5 6. exd5 Nf6 7. O-O Be7 8.
Qf3 Bg4 9. Qf4 Bd6 10. Re1+ Kf8 11. Qxd4 c5 12. Qd3 Qd7 13. Nc3 a6 14. a4 Bf5
15. Qf1 Ng4 16. f4 Rb8 17. d3 b5 18. axb5 axb5 19. Bxb5 Rxb5 20. Nxb5 Qxb5 21.
Ra8+ Bb8 22. Qe2 Nf6 23. Qe5 1-0

[Event "PK LSB groep B"]
[Site "Leiden"]
[Date "2026.06.08"]
[Round "4"]
[White "Vergeer, Michiel"]
[Black "Van Amsterdam, Jan"]
[Result "1/2-1/2"]
[WhiteElo "1774"]
[BlackElo "1842"]
[PlyCount "50"]
[EventDate "2026.??.??"]

1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. f4 c5 6. c3 Nc6 7. Ne2 cxd4 8. cxd4 Qb6 9. Nf3 f6 10. Nc3 Be7 11. Be2 O-O 12. Rf1 a6 13. Rb1 Qd8 14. Be3 b5 15. Qd2 Nb6 16. b3 Bd7 17. Kf2 Rc8 18. Kg1 Bb4 19. Rbc1 Ne7 20. Qb2 Nf5 21. Bd2 Qe7 22. Nb1 Bxd2 23. Qxd2 Rxc1 24. Rxc1 Rc8 25. Bd3 Rxc1+ 1/2-1/2

[Event "PK LSB groep B"]
[Site "Leiden"]
[Country "Nederland"]
[Date "2026.06.08"]
[Round "4"]
[White "Verbaken, Ilja"]
[Black "Beetstra, Jaap"]
[Result "0-1"]
[WhiteElo "1718"]
[BlackElo "1800"]
[PlyCount "56"]
[EventDate "2026.??.??"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. a3 Nh6 7. b4 cxd4 8. cxd4
Nf5 9. Bb2 Be7 10. Bd3 O-O 11. O-O Bd7 12. Nc3 Ncxd4 13. Nxd5 exd5 14. Nxd4
Nxd4 15. Bxd4 Qe6 16. f4 f5 17. Rc1 Rfc8 18. Qd2 a6 19. Qe3 Qf7 20. Rfe1 Be6
21. Qf2 Qh5 22. Be2 Qf7 23. Bc5 Bxc5 24. bxc5 Rc6 25. Qd4 Rac8 26. Rc3 b6 27.
Rec1 bxc5 28. Rxc5 Qa7 0-1

[Event "PK LSB groep B"]
[Site "Leiden"]
[Country "Nederland"]
[Date "2026.06.08"]
[Round "4"]
[White "Bharos, Nimai"]
[Black "Amkreutz, Mitch"]
[Result "1-0"]
[WhiteElo "1700"]
[BlackElo "1829"]
[PlyCount "11"]
[EventDate "2026.??.??"]

1. e4 c6 2. Nf3 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Qe2 Nbd7 6. Nd6# 1-0

[Event "PK LSB groep B"]
[Site "Leiden"]
[Date "2026.06.08"]
[Round "4"]
[White "Lewerissa, Bas"]
[Black "Tegelaar, Nick"]
[Result "1-0"]
[WhiteElo "1782"]
[BlackElo "1672"]
[PlyCount "55"]
[EventDate "2026.??.??"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bxe7 Qxe7 7. f4 Qb4 8. Rb1 c5 9. Nf3 Nc6 10. a3 Qb6 11. Nb5 O-O 12. c3 f6 13. Be2 fxe5 14. fxe5 a6 15. Nd6 cxd4 16. cxd4 Rf4 17. Qd2 Rf8 18. Qe3 Na5 19. O-O Qb3 20. Qg5 h6 21. Qg6 Nb6 22. Bd3 Qxd3 23. Qxd3 Bd7 24. Nh4 Nbc4 25. Ng6 Rxf1+ 26. Qxf1 Nxd6 27. exd6 Nc4 28. Qf4 1-0

[Event "PK LSB groep B"]
[Site "Leiden"]
[Date "2026.06.08"]
[Round "4"]
[White "Branco, Moritz"]
[Black "Van der Plas, Jan"]
[Result "1-0"]
[WhiteElo "1808"]
[BlackElo "1769"]
[PlyCount "91"]
[EventDate "2026.??.??"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nf6 5. h3 Nc6 6. c3 g6 7. Nf3 Bg7 8. O-O O-O 9. Bf4 Nh5 10. Bh2 f5 11. Re1 Nf6 12. Nbd2 Ne4 13. Qb3 Kh8 14. Rad1 Re8 15. Ne5 Nxe5 16. dxe5 Nc5 17. Qb5 b6 18. Bb1 a5 19. Qe2 Ba6 20. c4 e6 21. b3 Bh6 22. Nf3 a4 23. Qb2 Bg7 24. b4 Nd7 25. cxd5 Bb7 26. dxe6 Rxe6 27. Qd2 Bxf3 28. gxf3 Ra7 29. Qf4 Qf8 30. Qc4 Qe7 31. f4 Nf8 32. Rc1 Rd7 33. Red1 Rxd1+ 34. Rxd1 Qh4 35. Qd3 Bh6 36. Qd8 Qxd8 37. Rxd8 Kg7 38. Bd3 Rc6 39. Bb5 Rc2 40. Bxa4 Rxa2 41. Bb3 Rb2 42. e6 Re2 43. Kf1 Re4 44. f3 Re3 45. Kf2 Nxe6 46. Rd7+ 1-0

[Event "PK LSB groep B"]
[Site "Leiden"]
[Date "2026.06.08"]
[Round "4"]
[White "Van Vleuten, Ronald"]
[Black "Moeri, Erick"]
[Result "0-1"]
[WhiteElo "1736"]
[BlackElo "1800"]
[PlyCount "76"]
[EventDate "2026.??.??"]

1. d4 d6 2. Nf3 g6 3. e3 Bg7 4. Be2 Nf6 5. O-O O-O 6. c3 Bd7 7. Nbd2 Bc6 8. c4 e6 9. b4 Ne4 10. Nxe4 Bxe4 11. Nd2 Bc6 12. b5 Bd7 13. Bb2 c6 14. Qb3 cxb5 15. cxb5 d5 16. Nf3 a6 17. a4 axb5 18. axb5 Rxa1 19. Rxa1 Qb6 20. Ba3 Rc8 21. Bc5 Qd8 22. g3 Rxc5 23. Qb4 Rc8 24. Ra8 e5 25. dxe5 Bh3 26. Qd2 Nd7 27. Rxc8 Qxc8 28. Ng5 Bf5 29. Qxd5 Nxe5 30. f4 h6 31. e4 hxg5 32. exf5 Qc1+ 33. Kf2 gxf4 34. fxg6 Qe3+ 35. Kf1 Nxg6 36. Qd8+ Kh7 37. Qg5 Bd4 38. Qh5+ Kg7 0-1

[Event "PK LSB groep B"]
[Site "Leiden"]
[Country "Nederland"]
[Date "2026.06.08"]
[Round "4"]
[White "Van Leeuwen, Nick"]
[Black "Hofstee, Piet"]
[Result "1-0"]
[WhiteElo "1696"]
[BlackElo "1777"]
[PlyCount "81"]
[EventDate "2026.??.??"]

1. e4 c6 2. d4 d5 3. e5 Bf5 4. h4 h5 5. Bg5 Qb6 6. Bd3 Bxd3 7. Qxd3 e6 8. Nf3
Qa6 9. O-O Qxd3 10. cxd3 Ne7 11. Nbd2 Nf5 12. Rab1 Bb4 13. a3 Be7 14. Bxe7 Kxe7
15. b4 Nd7 16. Nb3 Rac8 17. Rfc1 b6 18. a4 Rc7 19. a5 Rhc8 20. axb6 axb6 21.
Ra1 Rb7 22. Ra6 Rbc7 23. Kf1 c5 24. dxc5 bxc5 25. bxc5 Nxc5 26. Nxc5 Rxc5 27.
Ra7+ Ke8 28. Rxc5 Rxc5 29. Ra4 Ne7 30. Ng5 Rc7 31. g3 Nc8 32. Ke2 Ne7 33. Kd2
Ng6 34. Ra8+ Ke7 35. f4 Nf8 36. Rb8 Rd7 37. Nf3 Rc7 38. Nd4 Nd7 39. Rg8 g6 40.
Nb5 Nf8 41. Nxc7 1-0

[Event "PK LSB groep B"]
[Site "Leiden"]
[Country "Nederland"]
[Date "2026.06.08"]
[Round "4"]
[White "Asthana, Reyansh"]
[Black "Schenkelaars, Vincent"]
[Result "0-1"]
[WhiteElo "1507"]
[BlackElo "1824"]
[PlyCount "44"]
[EventDate "2026.??.??"]

1. e4 d6 2. d4 Nf6 3. Nc3 c6 4. Bg5 Qa5 5. Bxf6 exf6 6. Bc4 Be7 7. Nge2 Nd7 8.
d5 Ne5 9. Bb3 Bd7 10. h4 c5 11. a3 b5 12. O-O Qb6 13. f4 Ng4 14. Kh1 Ne3 15.
Qd2 Nxf1 16. Rxf1 f5 17. Ng3 g6 18. Re1 O-O-O 19. exf5 Bxh4 20. Qf2 c4 21. Qxb6
axb6 22. Ba2 Bxg3 0-1

[Event "PK LSB groep B"]
[Site "Leiden"]
[Country "Nederland"]
[Date "2026.06.08"]
[Round "4"]
[White "Moeri, Casper"]
[Black "Been, Klaas"]
[Result "1-0"]
[WhiteElo "1751"]
[BlackElo "1727"]
[PlyCount "53"]
[EventDate "2026.??.??"]

1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4 Nf6 5. Nc3 c6 6. Be3 Be7 7. h3 Qc7 8. Qd2
a6 9. a4 c5 10. Nf3 Nc6 11. Bc4 Ne5 12. Nxe5 dxe5 13. Nd5 Qd6 14. Nxf6+ Qxf6
15. h4 h6 16. O-O-O Be6 17. Bxe6 Qxe6 18. Qd5 Qxd5 19. Rxd5 Rc8 20. Rxe5 f6 21.
Rd5 O-O 22. Rd7 Kf7 23. Rxb7 Rc6 24. Rd1 Ke6 25. Rdd7 Rf7 26. f4 Rd6 27. f5+
1-0

[Event "PK LSB groep B"]
[Site "Leiden"]
[Country "Nederland"]
[Date "2026.06.08"]
[Round "4"]
[White "Nouwens, Jeroen"]
[Black "Mulder, Abel"]
[Result "1-0"]
[WhiteElo "1843"]
[BlackElo "1653"]
[PlyCount "64"]
[EventDate "2026.??.??"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. Qa4+ Nc6 6. Qb3 O-O 7. Bg5 Bxc3+ 8.
Qxc3 h6 9. Bh4 g5 10. Bg3 Ne4 11. Qc1 f5 12. Be5 Nxe5 13. Nxe5 c5 14. e3 Qa5+
15. Ke2 cxd4 16. exd4 f4 17. f3 Nd6 18. Kf2 Nf5 19. Qc2 Rf6 20. Ng4 Rg6 21. Rd1
h5 22. Ne5 Rg7 23. Qc3 Qxa2 24. Bd3 Ne3 25. Ra1 Qxa1 26. Rxa1 g4 27. g3 dxc4
28. Nxc4 gxf3 29. gxf4 Nd5 30. Qc1 e5 31. Nxe5 Rg2+ 32. Kxf3 Rxh2 1-0

[Event "PK LSB groep B"]
[Site "Leiden"]
[Country "Nederland"]
[Date "2026.06.08"]
[Round "4"]
[White "Feldmeijer, Reitze"]
[Black "Oudshoorn, Paul"]
[Result "1-0"]
[WhiteElo "1695"]
[BlackElo "1798"]
[PlyCount "75"]
[EventDate "2026.??.??"]

1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. b3 b6 8. Nc3
Bb7 9. Bb2 Rc8 10. Rc1 Re8 11. cxd5 exd5 12. Re1 c5 13. dxc5 bxc5 14. e3 Nb6
15. Bh3 Rb8 16. Nd2 Bc8 17. Bg2 Be6 18. Qc2 Qd7 19. Nf3 Bd6 20. Red1 a6 21. Ne2
Bf5 22. Qc3 Bf8 23. Qe1 h6 24. Bxf6 gxf6 25. Qc3 Qe6 26. Nf4 Qc6 27. Nd4 Qd7
28. Nxf5 Qxf5 29. Nxd5 Re5 30. Nxb6 Rxb6 31. Qd3 a5 32. Qxf5 Rxf5 33. Rd7 a4
34. Bd5 Rd6 35. Bxf7+ Kg7 36. Rxd6 Bxd6 37. Bc4 a3 38. Rd1 1-0

[Event "PK LSB groep B"]
[Site "Leiden"]
[Date "2026.06.08"]
[Round "4"]
[White "Rudman, Lev"]
[Black "Lim, Danny"]
[Result "1-0"]
[ECO "D07"]
[WhiteElo "1776"]
[BlackElo "1538"]
[PlyCount "110"]
[EventDate "2026.??.??"]

1. d4 Nf6 2. c4 d5 3. Nc3 dxc4 4. e4 Nc6 5. Nf3 Bg4 6. d5 Bxf3 7. gxf3 Ne5 8. f4 Nd3+ 9. Bxd3 cxd3 10. Qxd3 e6 11. Qb5+ c6 12. dxc6 bxc6 13. Qxc6+ Nd7 14. Be3 Rc8 15. Qa6 Bc5 16. Nb5 Bxe3 17. Nd6+ Kf8 18. Nxc8 Nc5 19. Qd6+ Qxd6 20. Nxd6 Bxf4 21. Nc4 Nxe4 22. Rd1 Ke7 23. Rd4 f5 24. f3 e5 25. Rd5 Nf6 26. Ra5 Rc8 27. Rxa7+ Kf8 28. b3 Ne8 29. Ke2 Bg5 30. Rd1 Bf6 31. Rd5 h5 32. Kd3 Nc7 33. Rd7 Ne6 34. Rf7+ Kg8 35. Ne3 Rd8+ 36. Ke2 Nf4+ 37. Kf1 Rd2 38. Nxf5 Rd1+ 39. Kf2 Rd2+ 40. Kf1 Rd1+ 41. Kf2 Rd2+ 42. Ke1 Rxh2 43. b4 h4 44. Nh6+ gxh6 45. Rxf6 {De ene speler is gestopt met noteren, de ander speelt opnieuw Th2??} {Voor het gemak kies ik maar voor} Rg2 {, dan lijkt de verdere notatie nog aardig te kloppen.} 46. Kd1 Rg1+ 47. Kc2 Rg2+ 48. Kb3 Rd2 49. Rxh6 h3 50. b5 h2 51. Rah7 Rd3+ 52. Ka4 Rxf3 53. b6 Rf2 54. Rxh2 Rxh2 55. Rxh2 Kf7 1-0

[Event "PK LSB groep B"]
[Site "Leiden"]
[Date "2026.06.08"]
[Round "4"]
[White "Van Dijk, Jeroen"]
[Black "Bingen, Stanley"]
[Result "1-0"]
[ECO "A22"]
[WhiteElo "1667"]
[BlackElo "1412"]
[PlyCount "87"]
[EventDate "2026.??.??"]

1. c4 e5 2. Nc3 Nf6 3. g3 Be7 4. Bg2 c6 5. e4 O-O 6. Nge2 d6 7. O-O Nbd7 8. d3 Nc5 9. b4 Na6 10. Rb1 Nc7 11. a4 Ne6 12. h3 Rb8 13. Be3 b6 14. Qd2 Kh8 15. Kh2 Rg8 16. b5 c5 17. Nd5 Nxd5 18. exd5 Nf8 19. f4 Ng6 20. f5 Nf8 21. Nc3 f6 22. Ne4 Qe8 23. g4 g6 24. Ng3 gxf5 25. Nxf5 Bxf5 26. Rxf5 Ng6 27. Be4 Qf7 28. Qf2 Rbf8 29. Bh6 Re8 30. g5 Nf4 31. Rg1 Rg6 32. Qf3 Reg8 33. h4 Qe8 34. Qd1 Bf8 35. Bxf8 Qxf8 36. Rxf6 Rxf6 37. gxf6 Rxg1 38. Qxg1 Qxf6 39. Qg4 h5 40. Qc8+ Kg7 41. Qd7+ Qf7 42. Qxd6 Qf6 43. Qc7+ Kh6 44. Qh7# 1-0

[Event "PK LSB groep B"]
[Site "Leiden"]
[Country "Nederland"]
[Date "2026.06.08"]
[Round "4"]
[White "Hollenberg, Pieter"]
[Black "Pasteels, Luc"]
[Result "0-1"]
[WhiteElo "1250"]
[BlackElo "1714"]
[PlyCount "22"]
[EventDate "2026.??.??"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nc3 Nf6 5. Nf3 Bd6 6. Bg5 c6 7. h3 O-O 8. Qd2
Re8+ 9. Be2 Nbd7 10. O-O-O Qc7 11. Bxf6 Bf4 0-1

[Event "PK LSB groep B"]
[Site "Leiden"]
[Date "2026.06.08"]
[Round "4"]
[White "Van Polen, John"]
[Black "Fakkert, Erwin"]
[Result "1/2-1/2"]
[WhiteElo "1600"]
[BlackElo "1781"]
[PlyCount "60"]
[EventDate "2026.??.??"]

1. e4 c5 2. b4 cxb4 3. d4 e6 4. Nf3 Nf6 5. Bd3 Be7 6. O-O O-O 7. c4 bxc3 8. Nxc3 Nc6 9. e5 Nd5 10. Nxd5 exd5 11. a3 d6 12. h3 dxe5 13. Nxe5 Nxe5 14. dxe5 Be6 15. Be3 b6 16. f4 f5 17. exf6 Bxf6 18. Rb1 Qe8 19. Qf3 Bf7 20. Qf2 Qa4 21. Qc2 Qxc2 22. Bxc2 Rac8 23. Bf5 Rc7 24. Bd2 Bd4+ 25. Kh1 Re8 26. Bg4 Rce7 27. Bb4 Bc5 28. f5 Bxb4 29. axb4 Rc7 30. Rb2 h5 1/2-1/2

