[Event "PK LeiSB 2023 groep A"]
[Site "Leiden, Netherlands"]
[Date "2023.06.12"]
[Round "4"]
[White "Polak, Alexander"]
[Black "Passenier, Peter"]
[Result "0-1"]
[WhiteElo "2194"]
[BlackElo "2170"]
[PlyCount "0"]
[EventDate "2023.??.??"]

 0-1

[Event "PK LeiSB 2023 groep A"]
[Site "Leiden, Netherlands"]
[Date "2023.06.12"]
[Round "4"]
[White "Van der Knaap, Jan"]
[Black "Pijpers, Arthur"]
[Result "0-1"]
[WhiteElo "1890"]
[BlackElo "2459"]
[PlyCount "134"]
[EventDate "2023.??.??"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Nge7 6. Na3 Bd7 7. Be2 cxd4 8. cxd4
Nf5 9. Nc2 Be7 10. O-O O-O 11. Ne3 Qb6 12. Nxf5 exf5 13. a3 Rfc8 14. b4 Nd8 15.
h4 Bb5 16. Be3 Ne6 17. g3 Rc3 18. Bxb5 Qxb5 19. Qd2 Rac8 20. Rfc1 Rxc1+ 21.
Rxc1 Rc4 22. Rxc4 Qxc4 23. Kg2 h6 24. Kg1 Nc7 25. Qc1 Nb5 26. Qxc4 dxc4 27. Bc1
Nc3 28. Kf1 f6 29. Ke1 Kf7 30. Kd2 Nd5 31. Bb2 h5 32. exf6 Bxf6 33. Ne5+ Bxe5
34. dxe5 b5 35. f4 Ke6 36. Bd4 a6 37. Kc2 Ne7 38. Kd2 Kd5 39. Ke3 Nc6 40. Bc3
Nd8 41. Bd2 Ne6 42. Bc3 Nc7 43. Kf3 Na8 44. Ke3 Nb6 45. Bd4 Na4 46. Ba1 g6 47.
Bd4 c3 48. Kd3 Nb2+ 49. Kxc3 Nc4 50. Kd3 Nxa3 51. Bc3 Nc4 52. Ba1 a5 53. bxa5
Nxa5 54. Bc3 Nb3 55. Bb4 Nd4 56. Bc3 Nc6 57. Bb2 b4 58. Bc1 Nd4 59. Bb2 Nb3 60.
Kc2 Nc5 61. Kd2 Ne4+ 62. Ke3 Nxg3 63. Kd3 Ne4 64. Ke3 Nc5 65. Bd4 b3 66. Bb2
Na4 67. Bd4 b2 0-1

[Event "PK LeiSB 2023 groep A"]
[Site "Leiden, Netherlands"]
[Date "2023.06.12"]
[Round "4"]
[White "Margaryan, Artur"]
[Black "Vijver, Jonathan"]
[Result "0-1"]
[WhiteElo "2074"]
[BlackElo "1824"]
[PlyCount "70"]
[EventDate "2023.??.??"]

1. d4 f5 2. g3 Nf6 3. Bg2 g6 4. c4 Bg7 5. Qb3 Nc6 6. Nf3 d6 7. d5 Ne5 8. Nd4
O-O 9. Nc3 Neg4 10. O-O Nxh2 11. Rd1 Nhg4 12. c5 Kh8 13. c6 b6 14. Ne6 Bxe6 15.
dxe6 Qe8 16. Nb5 Qc8 17. a4 a6 18. Nc3 h6 19. f3 Ne5 20. f4 Neg4 21. e4 b5 22.
exf5 gxf5 23. Re1 Qe8 24. Nd5 Nxd5 25. Qxd5 Qh5 26. Ra3 Rab8 27. axb5 Rxb5 28.
Qd3 Rb4 29. Qf3 Bd4+ 30. Rae3 Rfb8 31. R1e2 Rc4 32. Bd2 Rxb2 33. Bf1 Rxd2 34.
Rxd2 Bxe3+ 35. Qxe3 Nxe3 0-1

[Event "PK LeiSB 2023 groep A"]
[Site "Leiden, Netherlands"]
[Date "2023.06.12"]
[Round "4"]
[White "Van der Scheer, Henk"]
[Black "Van der Marel, Lambertus"]
[Result "0-1"]
[WhiteElo "1908"]
[BlackElo "2087"]
[Annotator "van,Jan"]
[PlyCount "121"]
[EventDate "2023.??.??"]

1. d4 Nf6 2. Nf3 d5 3. g3 e6 4. Bg2 c5 5. O-O cxd4 6. Nxd4 Nc6 7. Nc3 Bb4 8.
Bg5 h6 9. Bf4 O-O 10. e4 Bxc3 11. bxc3 Nxe4 12. Bxe4 dxe4 13. Nxc6 bxc6 14. Bd6
Re8 15. Re1 e5 16. c4 Bf5 17. c5 Qg5 18. Qe2 Bg6 19. Rab1 f5 20. h4 Qf6 21. Qe3
Bf7 22. a4 Re6 23. Rb7 Rxd6 24. cxd6 Qxd6 25. f4 exf4 26. gxf4 Qg6+ 27. Kh2 Qh5
28. Qg3 Rd8 29. Rg1 Rd2+ 30. Kh3 Qf3 31. Rxa7 Rxc2 32. Qxf3 exf3 33. Kg3 Bd5
34. Kh3 Kf8 35. Kg3 c5 36. Rf1 Rg2+ 37. Kh3 c4 38. Rc7 g5 39. hxg5 hxg5 40. Rb1
Bf7 41. fxg5 Re2 42. Kg3 f2 43. Rf1 Re4 44. Rxf2 Rg4+ 45. Kf3 Rxg5 46. Kf4 Rh5
47. a5 Rh3 48. Rf3 Rh1 49. a6 Ra1 50. a7 Bd5 51. Rh3 Kg8 52. Ke5 Be4 53. Rc3
Ra5+ 54. Kf6 Ra6+ 55. Ke7 Bd5 56. Rg3+ Kh7 57. Kd8+ Kh6 58. Rg1 f4 59. Rd7 Bf3
60. Ke7 Kh5 61. Kf8 {vlag} 0-1

[Event "PK LeiSB 2023 groep A"]
[Site "Leiden, Netherlands"]
[Date "2023.06.12"]
[Round "4"]
[White "Van Drunick, Jan-Willem"]
[Black "Van Efferen, Yannick"]
[Result "1-0"]
[WhiteElo "1933"]
[BlackElo "1860"]
[PlyCount "75"]
[EventDate "2023.??.??"]

1. d4 Nf6 2. c4 g6 3. h4 d5 4. cxd5 Nxd5 5. e4 Nb6 6. Nc3 Bg7 7. Be3 Nc6 8. d5
Nb4 9. Be2 c6 10. a3 Na6 11. Bd4 e5 12. Be3 cxd5 13. exd5 Nc7 14. d6 Ne6 15. h5
Bd7 16. h6 Bf6 17. Nf3 Nf4 18. Bf1 Bc6 19. g3 Ne6 20. Bb5 O-O 21. Bxc6 bxc6 22.
Qd3 Re8 23. Kf1 Qd7 24. Rd1 Rad8 25. g4 Nf4 26. Bxf4 exf4 27. g5 Bh8 28. Rh4
Re6 29. Ne4 Qe8 30. Rxf4 Nd5 31. Rg4 Bxb2 32. Nd4 Re5 33. Nf3 Rf5 34. Nd4 Nf4
35. Qf3 Bxd4 36. Rxf4 Rxf4 37. Qxf4 Qe5 38. Nf6+ 1-0

[Event "PK LeiSB 2023 groep A"]
[Site "Leiden, Netherlands"]
[Date "2023.06.12"]
[Round "4"]
[White "Timmermans, Raymond"]
[Black "Van Briemen, Willem"]
[Result "1/2-1/2"]
[WhiteElo "1974"]
[BlackElo "1992"]
[PlyCount "118"]
[EventDate "2023.??.??"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bc5 7. Nxe5 Nxe5 8.
d4 Bxd4 9. Qxd4 d6 10. c3 O-O 11. Bg5 h6 12. Bh4 c5 13. Qd1 Ng6 14. Bxf6 Qxf6
15. Bd5 Rb8 16. Nd2 Nf4 17. Nb3 Qg5 18. g3 Nh3+ 19. Kg2 Nf4+ 20. Kg1 Nxd5 21.
Qxd5 Qxd5 22. exd5 Re8 23. Na5 Bg4 24. f3 Bf5 25. Rfe1 Kf8 26. Kf2 Rxe1 27.
Rxe1 Re8 28. Rxe8+ Kxe8 29. Ke3 Bb1 30. a3 Ba2 31. Ke4 Bb1+ 32. Ke3 Ba2 33. Ke4
g6 34. g4 Bb1+ 35. Ke3 Ba2 36. Ke4 Bb1+ 37. Ke3 g5 38. Nc6 Ba2 39. Ke4 Bb1+ 40.
Ke3 Ba2 41. Ke4 Bb1+ 42. Ke3 Kd7 43. Nb8+ Kc7 44. Nc6 f5 45. gxf5 Bxf5 46. b4
Bd7 47. Ne7 h5 48. Ng8 Be8 49. Nf6 Bg6 50. Ne4 Bf7 51. bxc5 dxc5 52. d6+ Kc6
53. d7 Kxd7 54. Nxc5+ Kd6 55. Nxa6 Kd5 56. Nc7+ Kc6 57. Na6 Kd5 58. Nc7+ Kc6
59. Na6 Kd5 1/2-1/2

[Event "PK LeiSB 2023 groep A"]
[Site "Leiden, Netherlands"]
[Date "2023.06.12"]
[Round "4"]
[White "Andringa, Arjo"]
[Black "Zeven, Frank"]
[Result "0-1"]
[WhiteElo "2014"]
[BlackElo "1929"]
[PlyCount "132"]
[EventDate "2023.??.??"]

1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 Nc6 7. Ne2 cxd4 8. cxd4
f6 9. exf6 Nxf6 10. O-O Bd6 11. Nf3 O-O 12. Bg5 Qc7 13. Bh4 Nh5 14. Qc2 h6 15.
Bh7+ Kh8 16. Bg6 Nf4 17. Nxf4 Bxf4 18. Bg3 Qd6 19. Rad1 Bd7 20. Qe2 Rf6 21. Bb1
Qf8 22. Nh4 Ne7 23. Rfe1 Bxg3 24. hxg3 g5 25. Nf3 Nc6 26. Ne5 Qg7 27. f3 Nxe5
28. Qxe5 Rf7 29. Qe3 Rc8 30. Kf2 Rf6 31. Rh1 Be8 32. Rc1 Rxc1 33. Qxc1 Rf7 34.
Qe3 Bd7 35. Rc1 Bc6 36. Bd3 Re7 37. f4 gxf4 38. gxf4 Rf7 39. Rh1 Qf6 40. g3 Kg7
41. Rh4 Bd7 42. Rg4+ Kf8 43. Rg6 Qh8 44. Ke1 h5 45. Be2 h4 46. Bg4 hxg3 47.
Qxg3 Qxd4 48. Bf3 Qxf4 49. Rg8+ Ke7 50. Bd1 Qxg3+ 51. Rxg3 Kd6 52. Kd2 e5 53.
Rg6+ Kc5 54. Be2 Kd4 55. Rg3 e4 56. Rb3 Bc6 57. Rg3 Rf2 58. Ke1 Rh2 59. a3 a5
60. Rb3 e3 61. Bd3 Rh1+ 62. Bf1 b5 63. Rd3+ Ke4 64. Rc3 Bd7 65. Rc7 Bh3 66.
Re7+ Kd4 0-1

[Event "PK LeiSB 2023 groep B"]
[Site "Leiden, Netherlands"]
[Date "2023.06.12"]
[Round "4"]
[White "Van de Poel, Jona"]
[Black "Shankar, Aravindh Swaminat"]
[Result "0-1"]
[WhiteElo "1717"]
[BlackElo "1729"]
[PlyCount "76"]
[EventDate "2023.??.??"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Nf6 5. e5 d5 6. Bb5 Nd7 7. O-O Be7 8.
Bxc6 bxc6 9. Nxd4 Nb8 10. c4 O-O 11. Nc3 c5 12. Nb3 d4 13. Qf3 c6 14. Ne4 Be6
15. Nexc5 Bxc4 16. Rd1 Qb6 17. Rxd4 Bd5 18. Qc3 Na6 19. Nxa6 Qxa6 20. Nc5 Qe2
21. Be3 Bxc5 22. Rd2 Qg4 23. f3 Bxe3+ 24. Qxe3 Qf5 25. Rd4 Rfe8 26. Re1 h6 27.
Rf4 Qe6 28. a3 a5 29. Rg4 Rab8 30. Qf2 Qf5 31. Qg3 g6 32. h4 Rxb2 33. Rf4 Qc2
34. Kh2 h5 35. Rf6 Re6 36. Rf4 Qf2 37. Qg5 Qxe1 38. Qd8+ Kg7 0-1

[Event "PK LeiSB 2023 groep B"]
[Site "Leiden, Netherlands"]
[Date "2023.06.12"]
[Round "4"]
[White "De Leede, Tjeerd"]
[Black "Beetstra, Jaap"]
[Result "1-0"]
[WhiteElo "1704"]
[BlackElo "1738"]
[PlyCount "95"]
[EventDate "2023.??.??"]

1. e4 d5 2. exd5 Nf6 3. Bb5+ Bd7 4. Be2 Nxd5 5. d4 Bf5 6. a3 g6 7. g4 Bc8 8. c4
Nb6 9. Be3 Bg7 10. h3 c6 11. Nf3 N8d7 12. Nc3 Qc7 13. Qd2 Nf6 14. Bf4 Qd8 15.
O-O-O Be6 16. b3 O-O 17. g5 Nfd7 18. h4 a5 19. a4 Bf5 20. Bd3 Bg4 21. Be2 e5
22. Nxe5 Bxe2 23. Nxe2 Qe7 24. Nxd7 Qa3+ 25. Qb2 Qxb2+ 26. Kxb2 Nxd7 27. Kc2
Rfe8 28. Nc3 f5 29. d5 Nc5 30. f3 Be5 31. Bxe5 Rxe5 32. dxc6 bxc6 33. Rd6 Re6
34. Rxe6 Nxe6 35. Rd1 Rd8 36. Rxd8+ Nxd8 37. Kd3 Ne6 38. Ne2 c5 39. Ke3 Kf7 40.
Kd3 Ke7 41. Nc3 Nd4 42. f4 Nxb3 43. Ne2 Kd7 44. Kc3 Nd4 45. Nxd4 cxd4+ 46. Kxd4
Kd6 47. c5+ Kc6 48. Kc4 1-0

[Event "PK LeiSB 2023 groep B"]
[Site "Leiden, Netherlands"]
[Date "2023.06.12"]
[Round "4"]
[White "Vergeer, Michiel"]
[Black "Schenkelaars, Robin"]
[Result "1/2-1/2"]
[WhiteElo "1688"]
[BlackElo "1750"]
[PlyCount "53"]
[EventDate "2023.??.??"]

1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 Nc6 7. Ne2 cxd4 8. cxd4
f6 9. exf6 Nxf6 10. Nf3 Bd6 11. Bf4 Bxf4 12. Nxf4 O-O 13. Ne2 Qb6 14. Qd2 Bd7
15. O-O Rae8 16. Rac1 Qb4 17. Rfd1 Qd6 18. Ng3 a6 19. a3 Re7 20. Re1 Rfe8 21.
Re2 e5 22. dxe5 Nxe5 23. Nxe5 Rxe5 24. Rxe5 Qxe5 25. h3 g6 26. Kf1 Kg7 27. Re1
1/2-1/2

[Event "PK LeiSB 2023 groep B"]
[Site "Leiden, Netherlands"]
[Date "2023.06.12"]
[Round "4"]
[White "De Witte, Sjoerd"]
[Black "Beentjes, Douwe"]
[Result "1-0"]
[WhiteElo "1648"]
[PlyCount "39"]
[EventDate "2023.??.??"]

1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. g3 Be7 5. Bg2 O-O 6. O-O b6 7. cxd5 exd5 8. Bf4
Bb7 9. Nc3 Nbd7 10. Qb3 c5 11. Rfd1 cxd4 12. Nxd4 Nc5 13. Qc2 Rc8 14. Bh3 Nh5
15. Bxc8 Qxc8 16. Qf5 Nxf4 17. Qxc8 Nxe2+ 18. Ndxe2 Bxc8 19. Nxd5 Re8 20. Nxe7+
1-0

[Event "PK LeiSB 2023 groep B"]
[Site "Leiden, Netherlands"]
[Date "2023.06.12"]
[Round "4"]
[White "Rozendaal, Henk"]
[Black "Kohlbeck, Ton"]
[Result "1/2-1/2"]
[WhiteElo "1738"]
[BlackElo "1831"]
[PlyCount "112"]
[EventDate "2023.??.??"]

1. c4 d5 2. cxd5 Qxd5 3. Nc3 Qa5 4. g3 c6 5. Bg2 Nf6 6. e4 e5 7. a3 Bg4 8. Qb3
b5 9. Nf3 b4 10. Ng5 Bh5 11. Nd1 h6 12. Nh3 Nbd7 13. O-O Rb8 14. Qc4 c5 15. b3
Qc7 16. d3 Be7 17. Ne3 O-O 18. Nf5 Nb6 19. Qc2 a5 20. axb4 axb4 21. Be3 Rfc8
22. Ra5 Bf8 23. Rfa1 Ra8 24. Rxa8 Rxa8 25. Rxa8 Nxa8 26. f3 Qa7 27. Kf2 Nd7 28.
g4 Bg6 29. Nh4 Nc7 30. f4 exf4 31. Nxf4 Bh7 32. Ne2 Ne5 33. h3 Nb5 34. Nf3 Nxf3
35. Bxf3 Qc7 36. Kg2 Na3 37. Qc1 Bd6 38. Nf4 Nb5 39. Nd5 Qa7 40. Nxb4 Nd4 41.
Bxd4 cxd4 42. Qc8+ Bf8 43. Nc6 Qc5 44. b4 Qg5 45. Kg3 h5 46. h4 Qf6 47. g5 Qd6+
48. e5 Qe6 49. Qxe6 fxe6 50. Nxd4 Bxb4 51. Bxh5 Bc3 52. Nxe6 Bxe5+ 53. Kf3 Bxd3
54. Nf4 Bxf4 55. Kxf4 g6 56. Bf3 Kg7 1/2-1/2

[Event "PK LeiSB 2023 groep B"]
[Site "Leiden, Netherlands"]
[Date "2023.06.12"]
[Round "4"]
[White "Groenendijk, Patrick"]
[Black "Van der Ven, Joao"]
[Result "1/2-1/2"]
[WhiteElo "1694"]
[BlackElo "1649"]
[PlyCount "134"]
[EventDate "2023.??.??"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Nbd7 5. Bf4 a6 6. e3 Be7 7. Bd3 dxc4 8.
Bxc4 b5 9. Bd3 Bb7 10. O-O O-O 11. h3 c5 12. dxc5 Nxc5 13. Be2 Qb6 14. a3 Qc6
15. Rc1 Rfd8 16. Qc2 Rac8 17. Ne1 Qb6 18. Bf3 Na4 19. Bxb7 Qxb7 20. Be5 Nd5 21.
Qb1 Ndxc3 22. Bxc3 Nxc3 23. Rxc3 Rxc3 24. bxc3 Bxa3 25. c4 Rc8 26. Nc2 Bf8 27.
cxb5 Qxb5 28. Qxb5 axb5 29. Nd4 Rb8 30. Rb1 b4 31. Kf1 g6 32. Ke2 Kg7 33. Kd3
Kf6 34. f4 Bc5 35. Nb3 Rd8+ 36. Ke4 Ba7 37. Rc1 Rd7 38. Rc4 Rd1 39. Rxb4 Re1
40. Nd4 Rg1 41. Rb2 Rd1 42. Rb4 h5 43. Nc6 Bc5 44. Rb3 Rg1 45. Kf3 Rf1+ 46. Ke2
Rg1 47. Kf3 Rf1+ 48. Ke2 Rc1 49. Ne5 Bd6 50. Nd3 Rc4 51. Rb5 Ra4 52. Rb7 Ra3
53. Ne5 Bxe5 54. fxe5+ Kxe5 55. Rxf7 Ra2+ 56. Kf3 Ra1 57. Rb7 Rf1+ 58. Ke2 Rf5
59. Rb5+ Ke4 60. Rb4+ Ke5 61. Rb5+ Kf6 62. Rb4 Kg5 63. Rc4 Ra5 64. Rb4 Ra1 65.
Kf3 Kf5 66. g4+ hxg4+ 67. hxg4+ Kf6 1/2-1/2

[Event "PK LeiSB 2023 groep B"]
[Site "Leiden, Netherlands"]
[Date "2023.06.12"]
[Round "4"]
[White "Van der Kolk, Constantijn"]
[Black "Brienen, Jacob"]
[Result "0-1"]
[BlackElo "1498"]
[PlyCount "56"]
[EventDate "2023.??.??"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d3 Nd6 6. Bxc6 dxc6 7. Nxe5 Be7
8. Re1 O-O 9. Nc3 Be6 10. Bf4 Re8 11. h3 Bf8 12. Qd2 f6 13. Nf3 Qd7 14. Kh2 Bf7
15. Ne2 c5 16. Ng3 Rad8 17. a3 b6 18. b4 Qc6 19. Qc3 Nb5 20. Qd2 Nd6 21. Rab1
Bd5 22. Nh4 Nf7 23. Be3 g6 24. Qd1 f5 25. Ngxf5 gxf5 26. Nxf5 Qg6 27. Nh4 Qg7
28. Nf5 Qxg2# 0-1

[Event "PK LeiSB 2023 groep B"]
[Site "Leiden, Netherlands"]
[Date "2023.06.12"]
[Round "4"]
[White "Van Veen, Kylian"]
[Black "Molenkamp, Jan Bertus"]
[Result "1/2-1/2"]
[WhiteElo "1735"]
[BlackElo "1785"]
[PlyCount "43"]
[EventDate "2023.??.??"]

1. e4 e6 2. Nf3 d5 3. Nc3 d4 4. Ne2 c5 5. c3 dxc3 6. bxc3 Nf6 7. Ng3 Qa5 8. Be2
Bd7 9. Qb3 Nc6 10. Qxb7 Rb8 11. Qa6 Qxa6 12. Bxa6 Bd6 13. Bd3 O-O 14. Ba3 Rfc8
15. O-O e5 16. Ba6 Rd8 17. Rfe1 Bg4 18. h3 Bxf3 19. gxf3 Bf8 20. Rad1 Rb6 21.
Bf1 g6 22. Kh2 1/2-1/2

[Event "PK LeiSB 2023 groep B"]
[Site "Leiden, Netherlands"]
[Date "2023.06.12"]
[Round "4"]
[White "Vlieland, Theo"]
[Black "Zwinkels, Wim"]
[Result "0-1"]
[WhiteElo "1396"]
[BlackElo "1776"]
[PlyCount "94"]
[EventDate "2023.??.??"]

1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. O-O Nf6 6. Re1 Nc6 7. c3 e6 8.
d4 cxd4 9. cxd4 d5 10. e5 Ne4 11. Nbd2 Nxd2 12. Bxd2 Be7 13. Bg5 O-O 14. Bxe7
Qxe7 15. Qd2 Rac8 16. h4 Rc7 17. h5 h6 18. Rac1 Rfc8 19. Rc3 Qb4 20. g4 Qe7 21.
Rec1 Na5 22. Rxc7 Rxc7 23. Rxc7 Qxc7 24. g5 hxg5 25. Qxg5 Kh7 26. Qd2 b6 27.
Kg2 Qe7 28. b3 f6 29. Qc2+ Kg8 30. Qg6 Qf7 31. exf6 Qxg6+ 32. hxg6 gxf6 33. Kg3
Kg7 34. Nh4 Nc6 35. Kg4 Nxd4 36. Kh5 Nc6 37. f4 Ne7 38. b4 d4 39. Kg4 Nxg6 40.
Nf3 d3 41. Nd2 e5 42. fxe5 Nxe5+ 43. Kf5 Kf7 44. a4 Ke7 45. a5 bxa5 46. bxa5 a6
47. Ke4 Ke6 0-1

[Event "PK LeiSB 2023 groep B"]
[Site "Leiden, Netherlands"]
[Date "2023.06.12"]
[Round "4"]
[White "Koelmans, Jan Willem"]
[Black "Eveleens, Ed"]
[Result "1/2-1/2"]
[ECO "A59"]
[WhiteElo "1810"]
[BlackElo "1697"]
[Annotator "van,Jan"]
[PlyCount "74"]
[EventDate "2023.??.??"]

{[%evp 0,74,19,31,25,-11,30,40,70,71,63,62,66,61,61,64,85,69,63,55,62,39,43,46,
50,47,66,60,79,66,60,69,69,60,74,71,78,25,46,-2,12,12,12,-31,-43,-86,-69,-95,
-106,-118,-118,-113,-113,-111,-119,-111,-103,-111,-111,-111,-109,-108,-108,
-108,-108,-108,-108,-108,-108,-121,-107,-121,-103,-117,-102,-120,-104]} 1. d4
Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 6. Nc3 g6 7. e4 Bxf1 8. Kxf1 d6
9. Nf3 Bg7 10. h3 Nbd7 11. Kg1 O-O 12. Kh2 Ne8 13. Re1 Ne5 14. Nxe5 Bxe5+ 15.
f4 Bg7 16. Be3 Qb8 17. Qe2 Nc7 18. Kh1 Qb7 19. Red1 Rfb8 20. Rd2 Nb5 21. Nxb5
Qxb5 22. Qxb5 Rxb5 23. e5 dxe5 24. fxe5 Bxe5 25. a4 Rxb2 26. Rxb2 Bxb2 27. Rb1
Bd4 28. Bxd4 cxd4 29. Rb4 d3 30. Rd4 d2 31. Rxd2 Rxa4 32. d6 exd6 33. Rxd6 h5
34. Kg1 Kg7 35. Rc6 Rf4 36. Rc5 Kh6 37. Re5 g5 {rest notatie onduidelijk.}
1/2-1/2

[Event "PK LeiSB 2023 groep B"]
[Site "Leiden, Netherlands"]
[Date "2023.06.12"]
[Round "4"]
[White "Uittenbogaard, Rob"]
[Black "Westveer, Paul"]
[Result "1/2-1/2"]
[WhiteElo "1477"]
[BlackElo "1345"]
[PlyCount "78"]
[EventDate "2023.??.??"]

1. Nf3 d6 2. d4 Nf6 3. c4 Nbd7 4. Nc3 e5 5. e4 c6 6. Qd3 Be7 7. Bg5 h6 8. Bd2
Qc7 9. Rc1 a5 10. d5 Nc5 11. Qc2 Bg4 12. Be2 Bh5 13. Be3 Ncd7 14. Nh4 Bxe2 15.
Nxe2 Ng4 16. Nf5 Nxe3 17. Nxe3 Bg5 18. O-O Bxe3 19. fxe3 O-O 20. Ng3 g6 21. Qe2
Nc5 22. Qg4 Kh7 23. Rf6 Nd7 24. Rf3 Rae8 25. Rcf1 Re7 26. Qh3 f6 27. Rf5 Ref7
28. R5f3 a4 29. Qe6 Nc5 30. Qh3 h5 31. Kh1 Qd8 32. Qh4 Rh8 33. Rxf6 Rxf6 34.
Qxf6 Qxf6 35. Rxf6 Rd8 36. h4 Kg7 37. Rf2 Nd3 38. Rd2 Nc5 39. Rf2 Nd3 1/2-1/2

[Event "PK LeiSB 2023 groep B"]
[Site "Leiden, Netherlands"]
[Date "2023.06.12"]
[Round "4"]
[White "Wagemans, Ed"]
[Black "Rudman, Lev"]
[Result "1/2-1/2"]
[WhiteElo "1784"]
[BlackElo "1224"]
[PlyCount "56"]
[EventDate "2023.??.??"]

1. e4 Nc6 2. Nf3 e5 3. Bb5 d6 4. O-O f5 5. exf5 Bxf5 6. d3 Nf6 7. Nc3 Be7 8.
Bg5 O-O 9. h3 a6 10. Bc4+ Kh8 11. Qd2 Bd7 12. Nh2 h6 13. Be3 Be8 14. f4 exf4
15. Bxf4 Bg6 16. Rae1 d5 17. Bb3 Bb4 18. Qf2 d4 19. a3 Ba5 20. Ne4 Bxe1 21.
Qxe1 Nxe4 22. dxe4 Qe7 23. e5 d3 24. Qg3 Bh7 25. cxd3 Qd8 26. e6 Qd4+ 27. Kh1
Qxd3 28. Rf3 Qe4 1/2-1/2

[Event "PK LeiSB 2023 groep B"]
[Site "Leiden, Netherlands"]
[Date "2023.06.12"]
[Round "4"]
[White "Van Vleuten, Ronald"]
[Black "Den Hollander, Steven"]
[Result "1/2-1/2"]
[WhiteElo "1590"]
[BlackElo "1546"]
[PlyCount "151"]
[EventDate "2023.??.??"]

1. Nf3 Nf6 2. b3 g6 3. Bb2 Bg7 4. d4 O-O 5. g3 d6 6. Bg2 Nbd7 7. O-O Re8 8. c4
c5 9. e3 Rb8 10. Nc3 cxd4 11. exd4 e5 12. dxe5 Nxe5 13. Nxe5 dxe5 14. Qxd8 Rxd8
15. Nb5 Ng4 16. h3 a6 17. Nc7 Rd7 18. Nd5 Nh6 19. Rae1 f6 20. g4 Nf7 21. c5 f5
22. Bc3 e4 23. Nf6+ Bxf6 24. Bxf6 Rd2 25. Ra1 Rc2 26. Rfc1 Rd2 27. Bc3 Rd3 28.
Ba5 Bd7 29. Rd1 Rc8 30. Rxd3 exd3 31. Bb6 Bc6 32. f3 Re8 33. Rd1 Re3 34. Bc7 g5
35. gxf5 Bxf3 36. Kf2 Bxd1 37. Kxe3 Be2 38. Bf3 Nh6 39. Bxe2 dxe2 40. Kxe2 Nxf5
41. b4 Kf7 42. a4 h5 43. Bd8 g4 44. hxg4 hxg4 45. Bb6 Kg6 46. Kd3 g3 47. b5 g2
48. c6 bxc6 49. bxa6 Ne7 50. Bc5 Nc8 51. a7 Nxa7 52. Bxa7 Kf6 53. Kc4 Ke6 54.
Kb4 Kd6 55. Ka5 c5 56. Bb8+ Kc6 57. Bh2 Kd5 58. Kb5 c4 59. a5 c3 60. a6 c2 61.
a7 c1=Q 62. a8=Q+ Kd4 63. Qd8+ Kc3 64. Be5+ Kc2 65. Qc8+ Kb1 66. Qf5+ Qc2 67.
Qg4 Qb3+ 68. Kc5 Qa3+ 69. Kd5 Qa8+ 70. Kd6 Qa6+ 71. Kd7 Qa7+ 72. Kc6 g1=Q 73.
Qb4+ Kc1 74. Qc3+ Kd1 75. Qd3+ Ke1 76. Bg3+ 1/2-1/2

[Event "PK LeiSB 2023 groep B"]
[Site "Leiden, Netherlands"]
[Date "2023.06.12"]
[Round "4"]
[White "Hoogeveen, Luuk"]
[Black "Pasteels, Luc"]
[Result "1-0"]
[WhiteElo "1643"]
[BlackElo "1401"]
[PlyCount "53"]
[EventDate "2023.??.??"]

1. e4 e6 2. d3 d5 3. Nd2 Nf6 4. g3 Bc5 5. Bg2 Nc6 6. Ngf3 O-O 7. O-O b6 8. Qe2
Nb4 9. c3 Nc2 10. Rb1 d4 11. Nb3 dxc3 12. Qxc2 cxb2 13. Bxb2 Be7 14. Bxf6 Bxf6
15. e5 Be7 16. Nfd4 Bd7 17. Nc6 Bxc6 18. Qxc6 Rc8 19. d4 Re8 20. Rfd1 Bf8 21.
a4 a5 22. Rbc1 f6 23. Bh3 f5 24. Qb7 Re7 25. d5 c6 26. dxc6 Qe8 27. c7 1-0

[Event "PK LeiSB 2023 groep B"]
[Site "Leiden, Netherlands"]
[Date "2023.06.12"]
[Round "4"]
[White "Moeri, Erick"]
[Black "De Witte, Job"]
[Result "0-1"]
[WhiteElo "1522"]
[BlackElo "1507"]
[PlyCount "30"]
[EventDate "2023.??.??"]

1. d4 d5 2. Bf4 c5 3. e3 cxd4 4. exd4 Nc6 5. c3 f6 6. Bd3 e5 7. Qh5+ g6 8.
Bxg6+ hxg6 9. Qxh8 exf4 10. Qxg8 Bf5 11. Ne2 Qd7 12. Qh8 Qe6 13. Kd2 Qe4 14.
Na3 O-O-O 15. Qxf6 Qd3+ 0-1

[Event "PK LeiSB 2023 groep B"]
[Site "Leiden, Netherlands"]
[Date "2023.06.12"]
[Round "4"]
[White "Tavridis, Efstathios"]
[Black "Engelen, Niels"]
[Result "1-0"]
[WhiteElo "1558"]
[BlackElo "1576"]
[Annotator "van,Jan"]
[PlyCount "0"]
[EventDate "2023.??.??"]

{1-0 forf.}  1-0

[Event "PK LeiSB 2023 groep B"]
[Site "Leiden, Netherlands"]
[Date "2023.06.12"]
[Round "4"]
[White "Brouwer, Tim"]
[Black "Cools, Frank"]
[Result "1-0"]
[WhiteElo "1631"]
[BlackElo "1440"]
[PlyCount "40"]
[EventDate "2023.??.??"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nf3 Bd6 5. c4 Bb4+ 6. Nc3 c6 7. Qb3 Qe7+ 8.
Be3 Nf6 9. c5 Ba5 10. Bd3 h6 11. O-O O-O 12. h3 Bc7 13. Rae1 Ne4 14. Bc1 f5 15.
Nxe4 fxe4 16. Rxe4 Qf7 17. Ne5 Bxe5 18. Rxe5 Nd7 19. Re3 Nf6 20. Qc2 Re8 1-0

[Event "PK LeiSB 2023 groep B"]
[Site "Leiden, Netherlands"]
[Date "2023.06.12"]
[Round "4"]
[White "Van den Berg, Dick"]
[Black "Been, Klaas"]
[Result "1-0"]
[WhiteElo "1697"]
[BlackElo "1543"]
[PlyCount "93"]
[EventDate "2023.??.??"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 Be7 6. e3 O-O 7. Bd3 Re8 8.
Qc2 h6 9. Bh4 c6 10. Nf3 Nbd7 11. O-O Nh5 12. Bxe7 Qxe7 13. Rab1 Nhf6 14. b4
Ne4 15. Bxe4 dxe4 16. Nd2 Nf6 17. b5 Bd7 18. a4 Rac8 19. b6 a6 20. Nc4 Nd5 21.
Na5 Bf5 22. Nxd5 cxd5 23. Qb3 Red8 24. Rfc1 Rxc1+ 25. Rxc1 Rd7 26. Rc8+ Kh7 27.
Qc3 g6 28. h3 Qd6 29. Qc5 Qxc5 30. Rxc5 Rd6 31. Nxb7 Rxb6 32. Rc7 Be6 33. Nc5
Kg7 34. a5 Rd6 35. Rb7 Bc8 36. Rb6 Rf6 37. h4 h5 38. g3 g5 39. hxg5 Rg6 40. Kg2
Kh7 41. f3 exf3+ 42. Kxf3 Bg4+ 43. Kf4 Be2 44. Nd7 Kg7 45. Rb8 Rd6 46. Nf6 Rc6
47. Rg8# 1-0

[Event "PK LeiSB 2023 groep B"]
[Site "Leiden, Netherlands"]
[Date "2023.06.12"]
[Round "4"]
[White "Branco, Moritz"]
[Black "Van Amsterdam, Jan"]
[Result "1-0"]
[WhiteElo "1429"]
[BlackElo "1708"]
[PlyCount "47"]
[EventDate "2023.??.??"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 Nc6 4. Nxc6 dxc6 5. d3 Bc5 6. Be2 h5 7. c3 Ng4 8.
d4 Qh4 9. g3 Qf6 10. f3 h4 11. Rg1 Nxh2 12. dxc5 hxg3 13. Qd4 Qh4 14. e5 Bg4
15. fxg4 Rd8 16. Qf4 Qh7 17. Qxg3 Qc2 18. Na3 Qe4 19. Bg5 Rd5 20. Qf4 Rxe5 21.
O-O-O Qxf4+ 22. Bxf4 Rxe2 23. Rh1 Rh4 24. Bg5 1-0

[Event "PK LeisB 2023 groep B"]
[Site "?"]
[Date "2023.06.12"]
[Round "4"]
[White "Hooshangi, Milan"]
[Black "de Ruyter, Wim"]
[Result "1/2-1/2"]
[ECO "D08"]
[WhiteElo "1605"]
[BlackElo "1595"]
[Annotator "van,Jan"]
[PlyCount "146"]
[EventDate "2023.??.??"]

{[%evp 0,146,19,21,10,-9,39,42,27,29,23,30,38,31,49,43,50,50,50,56,56,56,79,88,
88,73,79,70,70,46,46,33,52,49,42,49,42,40,36,35,55,43,52,42,47,42,51,34,42,44,
56,56,56,28,46,0,15,15,18,0,0,0,32,28,46,46,46,42,26,16,10,0,33,0,11,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,80,87,175,160,174,174,174,173,170,77,68,64,65,36,40,37,
34,34,34,34,34,34,34,34,34,34,34,35,34,34,34,34,34,34,34,34,34,34,34,34,34,34,
34,34,34,34,38,38,38,38,38,38,38,38,38,38,38]} 1. d4 d5 2. c4 e5 3. dxe5 d4 4.
Nf3 Nc6 5. a3 Nge7 6. Nbd2 Ng6 7. Nb3 Ngxe5 8. Nxe5 Nxe5 9. Qxd4 Qxd4 10. Nxd4
Nxc4 11. e4 Nb6 12. Nb5 Bd6 13. Nxd6+ cxd6 14. Bb5+ Bd7 15. Bxd7+ Nxd7 16. Bf4
Ne5 17. O-O Rc8 18. Rfd1 Ke7 19. Rd2 Rc6 20. Rad1 f6 21. h3 g5 22. Bg3 Rd8 23.
f3 Nc4 24. Re2 a5 25. Bf2 a4 26. Rc1 Rdc8 27. Rcc2 b5 28. Bd4 h5 29. Rf2 Ne5
30. Bc3 Nd3 31. Rfd2 Nxb2 32. Bxf6+ Kxf6 33. Rxb2 Rb6 34. Rd5 Rc5 35. Rd4 Rbc6
36. Rbd2 Ke6 37. Rd5 h4 38. Kf2 Rc2 39. Rxd6+ Rxd6 40. Rxc2 Rd3 41. Ra2 Ke5 42.
g3 Kd4 43. gxh4 gxh4 44. Ke2 Re3+ 45. Kf2 Rc3 46. Rd2+ Kc4 47. e5 Kb3 48. e6
Rc8 49. e7 Re8 50. Rd3+ Kc4 51. Re3 Kd5 52. Ke2 Kd6 53. Kd3 Rxe7 54. Rxe7 Kxe7
55. Kc3 Ke6 56. Kb4 Kf5 57. Kxb5 Kf4 58. Kxa4 Kg3 59. f4 Kxf4 60. Kb5 Kg3 61.
a4 Kxh3 62. a5 Kg2 63. a6 h3 64. a7 h2 65. a8=Q+ Kg1 66. Qa7+ Kg2 67. Qb7+ Kg1
68. Qb6+ Kh1 69. Kc4 Kg2 70. Qc6+ Kg1 71. Qc5+ Kg2 72. Qd5+ Kg1 73. Qd1+ Kg2
1/2-1/2

[Event "PK LeiSB 2023 groep B"]
[Site "Leiden, Netherlands"]
[Date "2023.06.12"]
[Round "4"]
[White "Ergincan, Çinar"]
[Black "Erbilen, Inci"]
[Result "0-1"]
[BlackElo "1338"]
[PlyCount "90"]
[EventDate "2023.??.??"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 b5 6. Bxb5 Qxd5 7. Bxc6+ Qxc6
8. Qf3 e4 9. Qb3 h6 10. Nxf7 Be6 11. Ne5 Bxb3 12. Nxc6 Bxc2 13. Nc3 Bd3 14. Nb4
Bxb4 15. a3 Ba5 16. b4 Bb6 17. Nd1 O-O 18. Nb2 Bd4 19. Ra2 Rae8 20. Nd1 Ng4 21.
Ne3 Nxf2 22. Rg1 Bb1 23. Rb2 Nd3+ 24. Kd1 Nxb2+ 25. Bxb2 Bxb2 26. Nc2 Bxc2+ 27.
Kxc2 Bd4 28. Rc1 Rf2 29. Kb1 Be5 30. g3 Rxh2 31. g4 Rxd2 32. Rg1 e3 33. Re1 Bf4
34. Kc1 Re6 35. b5 Re4 36. Kb1 Rc4 37. b6 cxb6 38. g5 Bxg5 39. a4 Rcc2 40. a5
Rb2+ 41. Kc1 Rdc2+ 42. Kd1 e2+ 43. Rxe2 Rxe2 44. axb6 Rec2 45. bxa7 Rc1# 0-1

[Event "PK LeiSB 2023 groep B"]
[Site "Leiden, Netherlands"]
[Date "2023.06.12"]
[Round "4"]
[White "Schenkelaars, Vincent"]
[Black "Varela, César"]
[Result "0-1"]
[WhiteElo "1750"]
[PlyCount "80"]
[EventDate "2023.??.??"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. cxd5 exd5 6. Bg5 O-O 7. e3 c6 8. Bd3
Nbd7 9. O-O Re8 10. Qc2 h6 11. Bh4 Bd6 12. Rac1 Nf8 13. Rfe1 Bg4 14. Nd2 Bh5
15. f3 Bg6 16. e4 dxe4 17. Ncxe4 Bxe4 18. fxe4 Be7 19. Nf3 Ne6 20. Qc4 Qb6 21.
Bf2 Ng4 22. Rc2 Nxf2 23. Rxf2 Rad8 24. Rd1 Bf6 25. e5 Be7 26. Bf5 Bf8 27. Kf1
Rd5 28. Bc2 Red8 29. Qd3 Qb5 30. Bb3 Qxd3+ 31. Rxd3 Nc5 32. Re3 Nxb3 33. Rxb3
b6 34. Re3 c5 35. e6 fxe6 36. Rxe6 cxd4 37. Ne5 d3 38. Ke1 d2+ 39. Kd1 Bb4 40.
a3 Rc5 0-1

[Event "PK LeiSB 2023 groep B"]
[Site "Leiden, Netherlands"]
[Date "2023.06.12"]
[Round "4"]
[White "Scheele, Peter"]
[Black "Noij, Fenno"]
[Result "1-0"]
[WhiteElo "1171"]
[BlackElo "1372"]
[PlyCount "107"]
[EventDate "2023.??.??"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Bd3 Qxd4 6. Nf3 Qd8 7. Be3 e6 8.
O-O Nf6 9. Ng3 Bxd3 10. Qxd3 Qxd3 11. cxd3 Bd6 12. Ne4 Nxe4 13. dxe4 Nd7 14.
Rad1 Bc7 15. Rfe1 Rd8 16. h3 O-O 17. b3 a6 18. Re2 Nf6 19. Rxd8 Rxd8 20. Bg5
Rd1+ 21. Ne1 Nd7 22. f3 Bg3 23. Kf1 Ne5 24. Be3 Nd3 25. Bd2 Kf8 26. f4 Bxf4 27.
Bxf4 Nxf4 28. Re3 g5 29. e5 b5 30. Rc3 Nxg2 31. Kxg2 Rxe1 32. Rxc6 Rxe5 33.
Rxa6 f5 34. a4 bxa4 35. b4 Kf7 36. Rxa4 Rb5 37. Ra7+ Kg6 38. Ra6 Kf6 39. Ra4 f4
40. Kf3 Kf5 41. Ra5 Rxa5 42. bxa5 e5 43. a6 e4+ 44. Ke2 g4 45. hxg4+ Kxg4 46.
a7 f3+ 47. Kf2 e3+ 48. Kxe3 Kg3 49. a8=Q f2 50. Qf3+ Kh4 51. Qxf2+ Kh3 52. Qg1
Kh4 53. Kf4 h5 54. Qg3# 1-0



