[Event "Leiden SB-ch 1920"]
[Site "Leiden"]
[Date "2020.02.21"]
[Round "5"]
[White "Van der Velden, Bram"]
[Black "Van Halderen, Herman"]
[Result "1-0"]
[ECO "A90"]
[WhiteElo "2186"]
[BlackElo "2016"]
[PlyCount "65"]
[EventDate "2019.11.08"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 e6 2. c4 f5 3. g3 Nf6 4. Bg2 c6 5. Nf3 d5 6. 0-0 Bd6 7. b3 Qe7 8. Bb2 0-0 9. Qc1 b5 10. Ne5 bxc4 11. bxc4 Ba6 12. Ba3 Bxa3 13. Qxa3 Qxa3 14. Nxa3 Nfd7 15. Nd3 Re8 16. Rfc1 Nb6 17. cxd5 cxd5 18. Nc5 Kf7 19. e3 Re7 20. Rab1 Kf6 21. Rc3 N6d7 22. Nxa6 Nxa6 23. Bf1 Nab8 24. Nb5 a6 25. Nd6 g5 26. Rb7 Kg6 27. Rc8 Kf6 28. Be2 g4 29. Bd1 a5 30. Ba4 Ra6 31. Ne8+ Kf7 32. Nc7 Rb6 33. Rcxb8 1-0

[Event "Leiden SB-ch 1920"]
[Site "Leiden"]
[Date "2020.01.24"]
[Round "4"]
[White "Van Vleuten, Ronald"]
[Black "Van Halderen, Herman"]
[Result "0-1"]
[ECO "A04"]
[WhiteElo "1622"]
[BlackElo "2016"]
[PlyCount "118"]
[EventDate "2019.11.08"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. Nf3 e6 2. b3 f5 3. Bb2 Nf6 4. e3 Be7 5. Be2 0-0 6. 0-0 b6 7. d4 Bb7 8. c4 Ne4 9. Nbd2 d6 10. Qc2 Nd7 11. Nxe4 fxe4 12. Nd2 Nf6 13. f3 exf3 14. Bxf3 Bxf3 15. Rxf3 d5 16. Raf1 Bb4 17. Bc3 Qe7 18. Bxb4 Qxb4 19. Qd3 Rad8 20. e4 dxc4 21. bxc4 e5 22. d5 Qc5+ 23. Qe3 Nd7 24. Qxc5 Nxc5 25. Rxf8+ Rxf8 26. Rxf8+ Kxf8 27. Kf2 Ke7 28. Ke3 Kd6 29. Nf3 Nd7 30. Kd3 a6 31. Nd2 Nf6 32. Nf3 h6 33. g3 g5 34. Nd2 Ng4 35. Nf3 Nf6 36. Nd2 Nd7 37. Nb3 Nc5+ 38. Nxc5 Kxc5 39. Kc3 b5 40. cxb5 axb5 41. a3 g4 42. Kb3 Kd4 43. Kb4 Kxe4 44. Kxb5 Kxd5 45. a4 e4 46. a5 c6+ 47. Kb6 e3 48. a6 e2 49. a7 e1Q 50. a8Q Qb4+ 51. Kc7 Qd6+ 52. Kb6 Ke5 53. Qe8+ Qe6 54. Qxe6+ Kxe6 55. Kxc6 h5 56. Kc5 Ke5 57. Kc4 Ke4 58. Kc3 Kf3 59. Kd3 Kg2 0-1

[Event "Leiden SB-ch 1920"]
[Site "Leiden"]
[Date "2019.12.20"]
[Round "3"]
[White "Van Halderen, Herman"]
[Black "Zwinkels, Wim"]
[Result "1/2-1/2"]
[ECO "E99"]
[WhiteElo "2016"]
[BlackElo "1806"]
[PlyCount "108"]
[EventDate "2019.11.08"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[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. Be2 0-0 6. Nf3 e5 7. 0-0 Nc6 8. d5 Ne7 9. Ne1 Nd7 10. Be3 f5 11. f3 f4 12. Bf2 g5 13. a4 a5 14. Nd3 b6 15. b4 axb4 16. Nxb4 h5 17. a5 bxa5 18. Nd3 Nf6 19. c5 g4 20. cxd6 cxd6 21. Na4 gxf3 22. Bxf3 Bg4 23. h3 Bxf3 24. gxf3 Rf7 25. Kh2 Bf8 26. Rg1+ Kh8 27. Rg2 Neg8 28. Qg1 Nh6 29. Kh1 Rh7 30. Bh4 Be7 31. Qb6 Nxd5 32. Bxe7 Nxe7 33. Nxe5 Qxb6 34. Nxb6 Rg8 35. Rxg8+ Kxg8 36. Rg1+ Rg7 37. Nec4 Nf7 38. Nxa5 Ng5 39. Nac4 Nxf3 40. Rxg7+ Kxg7 41. Nxd6 Ng5 42. Kh2 Kf6 43. Nbc4 Ng6 44. Nd2 Ke5 45. N6c4+ Kd4 46. e5 Nxe5 47. Nxe5 Kxe5 48. Kg2 Kd4 49. h4 Ne6 50. Kf3 Ke5 51. Nc4+ Kd4 52. Nd6 Ke5 53. Nc4+ Kf5 54. Nd6+ Ke5 1/2-1/2

[Event "Leiden SB-ch 1920"]
[Site "Leiden"]
[Date "2019.11.29"]
[Round "2"]
[White "Passenier, Peter"]
[Black "Van Halderen, Herman"]
[Result "1-0"]
[ECO "C11"]
[WhiteElo "2175"]
[BlackElo "2016"]
[PlyCount "91"]
[EventDate "2019.11.08"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[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. e5 Nfd7 5. f4 c5 6. Nf3 Nc6 7. Be3 Be7 8. Qd2 0-0 9. dxc5 Nxc5 10. 0-0-0 a6 11. Qf2 Qa5 12. Kb1 Nb4 13. a3 Nc6 14. Nd4 Bd7 15. h4 Rac8 16. h5 b5 17. h6 g6 18. Nb3 Nxb3 19. Bb6 Bc5 20. Bxc5 Nxc5 21. Qxc5 Qc7 22. Bd3 Na5 23. Qxc7 Rxc7 24. Ne2 Rfc8 25. Nd4 Nc4 26. Rhe1 a5 27. g4 b4 28. axb4 axb4 29. b3 Na3+ 30. Kc1 Rc5 31. Kd2 Bb5 32. Nxb5 Nxb5 33. Bxb5 Rxb5 34. Ra1 Rbc5 35. Rec1 Kf8 36. Ra4 Rb5 37. Rca1 Rbb8 38. Ra7 Ke8 39. R1a6 Rd8 40. f5 gxf5 41. gxf5 Rd7 42. fxe6 Re7 43. Ra8 Rd8 44. Rxd8+ Kxd8 45. Ra8+ Kc7 46. exf7 1-0

[Event "Leiden SB-ch 1920"]
[Site "Leiden"]
[Date "2019.11.08"]
[Round "1"]
[White "Van Halderen, Herman"]
[Black "Vleming, Stefan"]
[Result "1-0"]
[ECO "A57"]
[WhiteElo "2016"]
[BlackElo "1774"]
[PlyCount "68"]
[EventDate "2019.11.08"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. d5 b5 4. Qc2 g6 5. e4 Bg7 6. Nf3 0-0 7. h3 e6 8. e5 Ne8 9. Nc3 b4 10. Ne4 f6 11. Be3 fxe5 12. Bxc5 d6 13. Bxb4 Qb6 14. Bc3 Bb7 15. dxe6 Bxe4 16. Qxe4 Nf6 17. Qe3 Qxe3+ 18. fxe3 Ne4 19. Bb4 Nc6 20. Ba3 Ng3 21. Rg1 e4 22. Nd2 Nd4 23. exd4 Bxd4 24. Bxd6 Bf2+ 25. Kd1 Rfd8 26. Bxg3 e3 27. Bxf2 Rxd2+ 28. Kc1 exf2 29. Rh1 Rad8 30. e7 Rd1+ 31. Kc2 R8d2+ 32. Kc3 Kf7 33. Rxd1 Rxd1 34. b4 Kxe7 1-0

[Event "Leiden op-A 13th"]
[Site "Leiden"]
[Date "2019.07.18"]
[Round "6"]
[White "Le Clercq, Maxim"]
[Black "Van Halderen, Herman"]
[Result "0-1"]
[ECO "A40"]
[WhiteElo "1930"]
[BlackElo "2015"]
[PlyCount "78"]
[EventDate "2019.07.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. d4 e6 2. Bf4 c5 3. e3 Qb6 4. Na3 d5 5. Nb5 Na6 6. a4 c4 7. Nf3 Bd7 8. Be2 Nf6 9. 0-0 Be7 10. b3 cxb3 11. cxb3 0-0 12. Ne5 Be8 13. Rc1 Ne4 14. Bd3 f6 15. Nf3 Bc6 16. Nd2 g5 17. Bg3 Nxg3 18. hxg3 Nb4 19. Bb1 f5 20. Nc3 g4 21. Ne2 Bd6 22. Nf4 Bd7 23. Qe2 Qd8 24. f3 Bxf4 25. exf4 Nc6 26. fxg4 Nxd4 27. Qe3 Qb6 28. Kf2 fxg4 29. a5 Qb4 30. Rc7 Nf5 31. Bxf5 exf5 32. Rxd7 Rae8 33. Qxa7 Qxd2+ 34. Kg1 Re2 35. Rf2 Re1+ 36. Rf1 Rxf1+ 37. Kxf1 Qd1+ 38. Kf2 Re8 39. Rd8 Qe1# 0-1

[Event "Leiden op-A 13th"]
[Site "Leiden"]
[Date "2019.07.15"]
[Round "4"]
[White "Lenaerts, Lennert"]
[Black "Van Halderen, Herman"]
[Result "1-0"]
[ECO "A90"]
[WhiteElo "2355"]
[BlackElo "2015"]
[PlyCount "65"]
[EventDate "2019.07.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. d4 f5 2. g3 Nf6 3. Bg2 e6 4. c4 d5 5. Nh3 c6 6. 0-0 Bd6 7. Nd2 0-0 8. Qc2 Qe7 9. Nf3 Nbd7 10. Bf4 Ne4 11. Bxd6 Nxd6 12. b3 dxc4 13. bxc4 e5 14. dxe5 Nxe5 15. Nxe5 Qxe5 16. Nf4 Ne4 17. Rad1 Nc5 18. Rd2 Bd7 19. Rfd1 Be8 20. Nd3 Qe7 21. Nxc5 Qxc5 22. Rd4 Bg6 23. Qb2 Rab8 24. Rd7 Rf7 25. Rd8+ Rf8 26. R1d7 Bf7 27. Rxf7 Kxf7 28. Rd7+ Ke6 29. Qxg7 Rf6 30. Bd5+ cxd5 31. cxd5+ Ke5 32. Re7+ Kxd5 33. Qxf6 1-0

[Event "Leiden op-A 13th"]
[Site "Leiden"]
[Date "2019.07.12"]
[Round "1"]
[White "Van Vliet, Jeffrey"]
[Black "Van Halderen, Herman"]
[Result "1-0"]
[ECO "C12"]
[WhiteElo "2380"]
[BlackElo "2015"]
[PlyCount "63"]
[EventDate "2019.07.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Bd2 Bxc3 7. bxc3 Ne4 8. Qg4 g6 9. Bd3 Nxd2 10. Kxd2 c5 11. h4 Nc6 12. Rb1 Qc7 13. Rh3 c4 14. Be2 Bd7 15. Rf3 Rh7 16. Rf6 Ne7 17. Nh3 0-0-0 18. Qf3 Be8 19. g4 Ng8 20. Rf4 Qe7 21. Qe3 Qa3 22. h5 g5 23. Rf3 Bd7 24. Rg3 f5 25. f4 gxf4 26. Nxf4 Qe7 27. gxf5 exf5 28. Rbg1 Be6 29. Nxe6 Qxe6 30. Rg6 Qf7 31. e6 f4 32. Qe5 1-0

[Event "Leiden SB-ch 1819"]
[Site "Leiden"]
[Date "2019.05.24"]
[Round "8"]
[White "Van Halderen, Herman"]
[Black "Kindt, Manfred"]
[Result "1-0"]
[ECO "D85"]
[WhiteElo "2022"]
[BlackElo "1976"]
[PlyCount "75"]
[EventDate "2018.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[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 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Be3 c5 8. Nf3 0-0 9. Be2 Nc6 10. 0-0 Qa5 11. Qb3 cxd4 12. cxd4 Bg4 13. Rad1 Qb4 14. Qd3 Bxf3 15. gxf3 e5 16. d5 Nd4 17. Rb1 Qe7 18. Bd1 b6 19. Kh1 f5 20. Bxd4 exd4 21. Bb3 Kh8 22. Rbe1 Qe5 23. exf5 Qxf5 24. Qxf5 Rxf5 25. d6 Raf8 26. d7 Be5 27. Re4 d3 28. Rd1 Bc7 29. Rxd3 Bd8 30. Re8 Kg7 31. Rc3 Rc5 32. Rce3 Rcf5 33. Be6 Rc5 34. Bg4 h5 35. Rxf8 Kxf8 36. Re8+ Kf7 37. Rxd8 hxg4 38. Re8 1-0

[Event "Leiden SB-ch 1819"]
[Site "Leiden"]
[Date "2019.04.26"]
[Round "7"]
[White "Henseler, Jorgen"]
[Black "Van Halderen, Herman"]
[Result "1/2-1/2"]
[ECO "C12"]
[WhiteElo "2017"]
[BlackElo "2022"]
[PlyCount "68"]
[EventDate "2018.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[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 Bb4 5. e5 h6 6. Bd2 Bxc3 7. bxc3 Ne4 8. Qg4 g6 9. Bd3 Nxd2 10. Kxd2 c5 11. h4 Nc6 12. Nf3 c4 13. Be2 Qe7 14. g3 Bd7 15. Qf4 0-0-0 16. g4 Rdf8 17. Qf6 Qxf6 18. exf6 Re8 19. Ne5 Nxe5 20. dxe5 Bc6 21. Rh3 Kc7 22. Rb1 b5 23. Ke3 Rb8 24. Kd4 Rb6 25. f4 Rg8 26. h5 g5 27. fxg5 Rxg5 28. Rhh1 Ra6 29. Ra1 Bd7 30. Bf3 Rb6 31. Rhb1 a5 32. Rb2 Rb8 33. Rg1 Bc6 34. Rbb1 a4 1/2-1/2

[Event "Leiden SB-ch 1819"]
[Site "Leiden"]
[Date "2019.03.22"]
[Round "6"]
[White "Van Halderen, Herman"]
[Black "Binnendijk, Daan"]
[Result "1-0"]
[ECO "D36"]
[WhiteElo "2022"]
[BlackElo "1876"]
[PlyCount "91"]
[EventDate "2018.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 e6 2. c4 Nf6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 Be7 6. Qc2 c6 7. e3 h6 8. Bh4 Nh5 9. Bxe7 Qxe7 10. Be2 Nf6 11. Nf3 Nbd7 12. 0-0 0-0 13. Nd2 Re8 14. Rfe1 Nf8 15. Rab1 Bd7 16. b4 b6 17. Nf3 Ng6 18. Bd3 Ne4 19. Nd2 Nxd2 20. Qxd2 Qg5 21. Kh1 Rad8 22. b5 c5 23. dxc5 bxc5 24. b6 axb6 25. Rxb6 Bf5 26. Bxf5 Qxf5 27. Rb5 Ne5 28. Kg1 Qg4 29. Qe2 Qc8 30. Na4 c4 31. Rd1 Nd3 32. Qd2 Qf5 33. Nc3 Re6 34. Rf1 Rg6 35. f3 Qe6 36. e4 d4 37. Nd5 Qa6 38. Ra5 Qe6 39. Ra4 Rc8 40. Ra7 Re8 41. Rc7 Ne5 42. Qxd4 Qh3 43. Qf2 Nd3 44. Qd2 Kh7 45. Rxc4 Re5 46. Kh1 1-0

[Event "Leiden SB-ch 1819"]
[Site "Leiden"]
[Date "2019.02.15"]
[Round "5"]
[White "Van der Marel, Lambertus"]
[Black "Van Halderen, Herman"]
[Result "1-0"]
[ECO "A90"]
[WhiteElo "2127"]
[BlackElo "2022"]
[PlyCount "99"]
[EventDate "2018.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. Nf3 f5 2. b3 Nf6 3. g3 e6 4. Bg2 d5 5. 0-0 Bd6 6. c4 Qe7 7. Bb2 0-0 8. d4 c6 9. Qc1 b5 10. Nc3 bxc4 11. bxc4 Ba6 12. Ne5 Rc8 13. Na4 Nbd7 14. c5 Bxe5 15. dxe5 Ng4 16. Bd4 Ngxe5 17. Qc3 Ng6 18. f4 Nf6 19. Rfe1 Rcb8 20. Nb2 Ne4 21. Qa5 Bc8 22. a4 Rb7 23. Nd3 Qc7 24. Qxc7 Rxc7 25. Bxe4 fxe4 26. Ne5 Ba6 27. Rab1 Nxe5 28. Bxe5 Rd7 29. e3 Kf7 30. g4 Rg8 31. h4 Re8 32. Rb2 Bd3 33. Kf2 Ree7 34. Bd6 Rb7 35. Rd2 Red7 36. Kg3 Rb4 37. Rf2 Rxa4 38. f5 e5 39. Bxe5 Rb7 40. g5 Rab4 41. h5 Rb1 42. g6+ Kg8 43. Rxb1 Bxb1 44. f6 hxg6 45. hxg6 gxf6 46. Rxf6 Re7 47. Bd4 Rc7 48. Rd6 Rc8 49. Rd7 a6 50. Rh7 1-0

[Event "Leiden SB-ch 1819"]
[Site "Leiden"]
[Date "2019.01.11"]
[Round "4"]
[White "Van Halderen, Herman"]
[Black "Van Briemen, Willem Jan"]
[Result "1-0"]
[ECO "E54"]
[WhiteElo "2022"]
[BlackElo "1938"]
[PlyCount "63"]
[EventDate "2018.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Bd3 d5 6. Nf3 c5 7. 0-0 cxd4 8. exd4 dxc4 9. Bxc4 b6 10. Bg5 Bb7 11. Re1 Nbd7 12. Rc1 Rc8 13. Bb5 Bxc3 14. bxc3 a6 15. Bd3 b5 16. a4 Qa5 17. axb5 axb5 18. Bd2 Bxf3 19. Qxf3 Nb6 20. Ra1 Na4 21. Qh3 Qb6 22. Re5 Ra8 23. Rxb5 Qc7 24. Rab1 Rfb8 25. Qg3 Qxg3 26. hxg3 Rc8 27. c4 h6 28. R1b4 Rd8 29. Bc2 Rxd4 30. Rb8+ Rd8 31. Rxa8 Rxa8 32. Rxa4 1-0

[Event "Leiden SB-ch 1819"]
[Site "Leiden"]
[Date "2018.12.07"]
[Round "3"]
[White "Vogt, Andreas"]
[Black "Van Halderen, Herman"]
[Result "1-0"]
[ECO "A10"]
[WhiteElo "2144"]
[BlackElo "2022"]
[PlyCount "75"]
[EventDate "2018.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. Nf3 e6 2. c4 f5 3. g3 Nf6 4. Bg2 d5 5. 0-0 Bd6 6. b3 Qe7 7. Bb2 c6 8. Nc3 0-0 9. d3 Nbd7 10. Re1 f4 11. cxd5 exd5 12. e4 fxg3 13. hxg3 d4 14. Nxd4 Ne5 15. Nf5 Bxf5 16. exf5 Qd7 17. Ne4 Nxe4 18. dxe4 Qe7 19. Qe2 Rad8 20. Rad1 Kh8 21. Rd2 Rd7 22. Red1 Rfd8 23. Bc3 Bc7 24. Rxd7 Rxd7 25. Rxd7 Qxd7 26. Qd2 Qxd2 27. Bxd2 Bb6 28. Kf1 Kg8 29. Ke2 Kf7 30. f4 Nd7 31. e5 Ke7 32. g4 h6 33. Bc3 Bc7 34. Be4 a5 35. Kf3 Bd8 36. e6 Nf6 37. g5 Ng8 38. Bxg7 1-0

[Event "Leiden SB-ch 1819"]
[Site "Leiden"]
[Date "2018.11.09"]
[Round "2"]
[White "Van Halderen, Herman"]
[Black "Hordijk, Frank"]
[Result "1-0"]
[ECO "D17"]
[WhiteElo "2022"]
[BlackElo "1544"]
[PlyCount "47"]
[EventDate "2018.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 Nbd7 7. Nxc4 Nb6 8. Ne5 a5 9. f3 Nfd7 10. Nxd7 Qxd7 11. e4 Be6 12. d5 Nxd5 13. exd5 Bxd5 14. Nxd5 Qxd5 15. Qxd5 cxd5 16. Bb5+ Kd8 17. Be3 e6 18. Bb6+ Ke7 19. Rc1 Kf6 20. 0-0 Bb4 21. Rc7 Rab8 22. f4 Rhc8 23. Bd4+ Kg6 24. Bd3+ 1-0

[Event "Leiden SB-ch 1819"]
[Site "Leiden"]
[Date "2018.10.19"]
[Round "1"]
[White "Van Wessel, Rudy"]
[Black "Van Halderen, Herman"]
[Result "0-1"]
[ECO "A90"]
[WhiteElo "2389"]
[BlackElo "2022"]
[PlyCount "108"]
[EventDate "2018.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 e6 2. Nf3 f5 3. g3 Nf6 4. Bg2 d5 5. 0-0 Bd6 6. c4 c6 7. b3 Qe7 8. Bb2 0-0 9. Ne5 Nbd7 10. Nd2 Ne4 11. Ndf3 g5 12. Nxd7 Bxd7 13. Ne5 g4 14. f3 Nf6 15. Qd2 Qg7 16. a4 Rfd8 17. Qe3 h5 18. Ba3 Bc7 19. Rfd1 Re8 20. Rac1 Rad8 21. Rb1 Bc8 22. c5 h4 23. gxh4 Bxe5 24. dxe5 gxf3 25. exf3 Nd7 26. Re1 Kf7 27. Kh1 Qh7 28. Qf2 Rh8 29. Bc1 Rdg8 30. b4 Qxh4 31. Qxh4 Rxh4 32. f4 a5 33. Be3 axb4 34. Rec1 Rhg4 35. Bf3 Rh4 36. Bg2 Rgh8 37. Rxb4 Nxe5 38. Rb3 Rxh2+ 39. Kg1 Nd7 40. Bd4 R8h7 41. Rcb1 R2h4 42. Be3 d4 43. Bxd4 Rxf4 44. Be3 Rxa4 45. Rxb7 Bxb7 46. Rxb7 Kg6 47. Bxc6 Rg4+ 48. Kf1 Rh3 49. Bf2 Ne5 50. Be8+ Kf6 51. c6 Rc4 52. c7 Rhc3 53. c8Q Rc1+ 54. Ke2 Re4+ 0-1

[Event "Leiden op-A 12th"]
[Site "Leiden"]
[Date "2018.07.18"]
[Round "5"]
[White "Van Halderen, Herman"]
[Black "Van Dael, Siem"]
[Result "0-1"]
[ECO "E99"]
[WhiteElo "2048"]
[BlackElo "2212"]
[PlyCount "74"]
[EventDate "2018.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 185 Extra"]
[Source "ChessBase"]
[SourceDate "2018.07.29"]
[SourceVersion "1"]
[SourceVersionDate "2018.07.29"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. Nf3 e5 7. 0-0 Nc6 8. d5 Ne7 9. Ne1 Nd7 10. Be3 f5 11. f3 f4 12. Bf2 g5 13. a4 a5 14. Nd3 b6 15. b4 axb4 16. Nxb4 Nf6 17. Nd3 h5 18. a5 bxa5 19. c5 Rf7 20. Qd2 Ng6 21. Rfb1 g4 22. cxd6 cxd6 23. Bb6 Qe7 24. Rxa5 Rxa5 25. Bxa5 Nh4 26. Kh1 Bf8 27. Rb8 gxf3 28. Bxf3 Nxf3 29. gxf3 Bh3 30. Bd8 Qa7 31. Rb1 Rg7 32. Bb6 Qa6 33. Nxf4 exf4 34. Qxf4 Bg2+ 35. Kg1 Bxf3+ 36. Kf2 Nxe4+ 37. Kxf3 Nxc3 0-1

[Event "Leiden op-A 12th"]
[Site "Leiden"]
[Date "2018.07.14"]
[Round "2"]
[White "Kukov, Velislav"]
[Black "Van Halderen, Herman"]
[Result "1/2-1/2"]
[ECO "A80"]
[WhiteElo "2382"]
[BlackElo "2048"]
[PlyCount "89"]
[EventDate "2018.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 185 Extra"]
[Source "ChessBase"]
[SourceDate "2018.07.29"]
[SourceVersion "1"]
[SourceVersionDate "2018.07.29"]
[SourceQuality "1"]

1. d4 e6 2. Nf3 f5 3. Bg5 Nf6 4. Nbd2 Be7 5. Bxf6 Bxf6 6. e4 0-0 7. Bd3 d5 8. e5 Be7 9. Qe2 c5 10. dxc5 Bxc5 11. Nb3 Be7 12. 0-0 Nc6 13. c3 Bd7 14. Rad1 Kh8 15. c4 Qe8 16. cxd5 exd5 17. e6 Bc8 18. Nfd4 g6 19. Nb5 Bd8 20. Rfe1 Rf6 21. N5d4 Be7 22. a3 a6 23. Rc1 Bd6 24. Bb1 Ne5 25. Rc2 b6 26. f4 Nc4 27. Qf3 Bb7 28. Rce2 Be7 29. h3 Nd6 30. g4 fxg4 31. hxg4 Ne4 32. Qe3 Bd6 33. Bxe4 Bxf4 34. Qc3 Rc8 35. Nc6 Qxe6 36. Bxd5 Qxg4+ 37. Rg2 Qh4 38. Re6 Bg5 39. Qe5 Bxc6 40. Bxc6 Rd8 41. Bf3 Rd3 42. Re8+ Kg7 43. Re7+ Kf8 44. Re8+ Kg7 45. Re7+ 1/2-1/2

[Event "Leiden op-A 12th"]
[Site "Leiden"]
[Date "2018.07.13"]
[Round "1"]
[White "Van Halderen, Herman"]
[Black "Viani, Antonio Dcunha"]
[Result "0-1"]
[ECO "E99"]
[WhiteElo "2048"]
[BlackElo "2404"]
[PlyCount "108"]
[EventDate "2018.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 185 Extra"]
[Source "ChessBase"]
[SourceDate "2018.07.29"]
[SourceVersion "1"]
[SourceVersionDate "2018.07.29"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. Nf3 e5 7. 0-0 Nc6 8. d5 Ne7 9. Ne1 Nd7 10. Be3 f5 11. f3 f4 12. Bf2 g5 13. a4 h5 14. a5 Ng6 15. Nb5 a6 16. Na7 Rxa7 17. Bxa7 b6 18. Nd3 Bb7 19. Nb4 Ne7 20. axb6 cxb6 21. Nxa6 Bxa6 22. Rxa6 Qc7 23. b4 g4 24. fxg4 hxg4 25. Bxg4 Qxc4 26. Qe2 Qd4+ 27. Kh1 Nf6 28. Bxb6 Qxb4 29. Be6+ Kh7 30. Qf2 Qxe4 31. Qh4+ Kg6 32. Ra3 Nf5 33. Qh3 Nxd5 34. Qg4+ Kf6 35. Bxd5 Qxd5 36. h4 Qb5 37. Rd1 Qxb6 38. h5 Ne7 39. Qh4+ Kf7 40. h6 Rh8 41. Qh5+ Ke6 42. Qg4+ Nf5 43. Qg6+ Bf6 44. h7 Qc7 45. Rh3 Qg7 46. Qxg7 Bxg7 47. Rb1 e4 48. Rb7 e3 49. g4 fxg3 50. Kg2 e2 51. Rb1 Bc3 52. Rhh1 Kf6 53. Kf3 e1Q 54. Rbxe1 Bxe1 0-1

[Event "Leiden LCT op-A 11th"]
[Site "Leiden"]
[Date "2017.07.23"]
[Round "9"]
[White "Van Halderen, Herman"]
[Black "Schroeder, Marc JPG"]
[Result "1-0"]
[ECO "D35"]
[WhiteElo "2071"]
[BlackElo "1909"]
[PlyCount "67"]
[EventDate "2017.07.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 Bb4 6. e3 c5 7. dxc5 Nbd7 8. Bb5 Bxc3+ 9. bxc3 0-0 10. Bxd7 Bxd7 11. Ne2 Be6 12. 0-0 h6 13. Bh4 g5 14. Bg3 Ne4 15. Qd4 Qa5 16. f3 Nxg3 17. Nxg3 f6 18. Qd3 f5 19. Qd4 Qc7 20. Rab1 f4 21. Ne2 fxe3 22. Rb2 Rad8 23. Qxe3 Bc8 24. Qd4 Qe7 25. f4 Qf7 26. Ng3 g4 27. f5 h5 28. Qf4 Qe7 29. f6 Qxc5+ 30. Kh1 Rf7 31. Qg5+ Kf8 32. Re2 Qxc3 33. Re7 Re8 34. Qh6+ 1-0

[Event "Leiden LCT op-A 11th"]
[Site "Leiden"]
[Date "2017.07.22"]
[Round "8"]
[White "Vreeburg, Jan"]
[Black "Van Halderen, Herman"]
[Result "0-1"]
[ECO "D37"]
[WhiteElo "1927"]
[BlackElo "2071"]
[PlyCount "104"]
[EventDate "2017.07.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. c4 c5 4. e3 Be7 5. Nc3 0-0 6. Be2 d5 7. 0-0 dxc4 8. Bxc4 cxd4 9. Nxd4 a6 10. Qf3 Qc7 11. Bd3 Nbd7 12. Qe2 Rd8 13. Bd2 Nc5 14. Bc2 Bf8 15. b4 Ncd7 16. a3 Nb6 17. Bb3 e5 18. Nf3 e4 19. Ng5 Bg4 20. f3 exf3 21. gxf3 Bh5 22. Rac1 Qe5 23. e4 Rac8 24. Qe3 Nc4 25. Bxc4 Rxc4 26. Ne2 Rxc1 27. Bxc1 h6 28. Nh3 a5 29. Bd2 axb4 30. Bxb4 Bxb4 31. axb4 Qb5 32. Nhf4 g5 33. Qc3 Qb6+ 34. Kh1 gxf4 35. Rg1+ Kh7 36. Nxf4 Qd4 37. Qb3 Rd7 38. Nxh5 Nxh5 39. Qc2 Qd3 40. Qg2 Rd8 41. Qg4 Qb5 42. f4 Qxb4 43. Qf5+ Kh8 44. Qe5+ f6 45. Qxh5 Qxe4+ 46. Rg2 Qxf4 47. h3 Qc1+ 48. Kh2 Qc7+ 49. Kh1 Qh7 50. Rg6 Rd1+ 51. Kg2 Rd5 52. Qg4 Qxg6 0-1

[Event "Leiden LCT op-A 11th"]
[Site "Leiden"]
[Date "2017.07.17"]
[Round "4"]
[White "Kat, Rudolf"]
[Black "Van Halderen, Herman"]
[Result "1-0"]
[ECO "B25"]
[WhiteElo "1924"]
[BlackElo "2071"]
[PlyCount "51"]
[EventDate "2017.07.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 e6 6. Be3 d6 7. Qd2 Nge7 8. Bh6 0-0 9. Bxg7 Kxg7 10. Nh3 Rb8 11. 0-0 b5 12. f4 Nd4 13. Nd1 b4 14. Ne3 Bb7 15. c3 Ndc6 16. f5 exf5 17. exf5 gxf5 18. Nxf5+ Nxf5 19. Rxf5 f6 20. Rh5 Qd7 21. Qh6+ Kh8 22. Be4 f5 23. Rf1 Qg7 24. Qxg7+ Kxg7 25. Rg5+ Kh6 26. Rf4 1-0

[Event "Leiden LCT op-A 11th"]
[Site "Leiden"]
[Date "2017.07.14"]
[Round "1"]
[White "Van Halderen, Herman"]
[Black "Beerdsen, Thomas"]
[Result "0-1"]
[ECO "E44"]
[WhiteElo "2071"]
[BlackElo "2452"]
[PlyCount "84"]
[EventDate "2017.07.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 179 Extra"]
[Source "ChessBase"]
[SourceDate "2017.08.23"]
[SourceVersion "1"]
[SourceVersionDate "2017.08.23"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Nge2 Bb7 6. a3 Be7 7. d5 0-0 8. g3 b5 9. b3 b4 10. axb4 Bxb4 11. Bg2 exd5 12. 0-0 c6 13. cxd5 c5 14. Bb2 d6 15. Nf4 Nbd7 16. Ne4 Nxe4 17. Bxe4 Nf6 18. Bc2 Re8 19. Nh5 Nxh5 20. Qxh5 h6 21. h4 Bc8 22. g4 Qd7 23. Bf5 Qe7 24. Bxc8 Raxc8 25. g5 hxg5 26. hxg5 a5 27. Rfc1 Qe4 28. Rc4 Qh7 29. Qg4 Qd3 30. Rd1 Qxb3 31. Ba1 Ba3 32. Kg2 Bb2 33. Bxb2 Qxb2 34. Rf4 g6 35. Rf6 Qe5 36. Rf4 c4 37. Rxc4 Rxc4 38. Qxc4 Qxg5+ 39. Kf1 Qf5 40. Qb3 Qf3 41. Rd4 Rc8 42. Qb1 Qh1+ 0-1

[Event "Leiden op-A 10th"]
[Site "Leiden"]
[Date "2016.07.23"]
[Round "8"]
[White "Van Halderen, Herman"]
[Black "Van Briemen, Willem Jan"]
[Result "1-0"]
[ECO "A77"]
[WhiteElo "2079"]
[BlackElo "2047"]
[PlyCount "123"]
[EventDate "2016.07.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 173 Extra"]
[Source "ChessBase"]
[SourceDate "2016.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2016.08.29"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. c4 c5 4. d5 d6 5. Nc3 exd5 6. cxd5 g6 7. Nd2 a6 8. a4 Nbd7 9. e4 Bg7 10. Be2 0-0 11. 0-0 Re8 12. Qc2 Rb8 13. Ra3 Qc7 14. h3 b6 15. Rb3 h6 16. Kh1 g5 17. Nc4 Ne5 18. Nxe5 Rxe5 19. f4 gxf4 20. Bxf4 Re8 21. Bxh6 Bxh6 22. Rxf6 Bg7 23. Rf1 Re5 24. Nd1 Qe7 25. Bd3 b5 26. axb5 axb5 27. Bxb5 Rxe4 28. Bd3 Rxb3 29. Qxb3 Rb4 30. Qc2 Rh4 31. Qe2 Qxe2 32. Bxe2 Be5 33. b3 Rd4 34. Bc4 Bb7 35. Ne3 Rd2 36. Rd1 Rb2 37. Ng4 Bd4 38. Rf1 Kg7 39. Nh2 Be5 40. Nf3 Bg3 41. Ng5 f6 42. Ne6+ Kg6 43. Nd8 Bc8 44. Ne6 Kf7 45. Nf4 Rd2 46. Ne6 Kg6 47. Kg1 Bb7 48. Nc7 Bc8 49. Ne6 Bb7 50. Nf8+ Kg7 51. Nd7 Be5 52. Nb6 Kg6 53. Rf3 Ra2 54. Kf1 Rd2 55. Rf2 Rxf2+ 56. Kxf2 Bc3 57. Kf3 Ba5 58. Na4 Bc8 59. Nb2 Bd2 60. Bd3+ Kf7 61. Nc4 Ke7 62. Nxd2 1-0

[Event "Leiden op-A 10th"]
[Site "Leiden"]
[Date "2016.07.17"]
[Round "3"]
[White "Baak, Evert"]
[Black "Van Halderen, Herman"]
[Result "0-1"]
[ECO "A33"]
[WhiteElo "1924"]
[BlackElo "2079"]
[PlyCount "82"]
[EventDate "2016.07.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 173 Extra"]
[Source "ChessBase"]
[SourceDate "2016.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2016.08.29"]
[SourceQuality "1"]

1. Nf3 c5 2. c4 Nf6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 e6 6. g3 Bb4 7. Bg2 0-0 8. 0-0 Qb6 9. Nc2 Bxc3 10. bxc3 Qa5 11. Qd2 d5 12. Ne3 Rd8 13. cxd5 exd5 14. Qc2 Be6 15. Bd2 Qa6 16. Rab1 Rac8 17. Rfe1 b6 18. Qb2 Ne5 19. Rbc1 Rc5 20. h3 Qc8 21. Kh2 h5 22. Red1 Qc7 23. Kg1 Qc8 24. Kh2 Qa6 25. Be1 Rdc8 26. f4 Nc4 27. Nxc4 Rxc4 28. Bf2 Ra4 29. Rc2 h4 30. g4 Rxf4 31. Bd4 b5 32. e3 Nxg4+ 33. hxg4 Rxg4 34. Bh3 Qd6+ 35. Kh1 Qg3 36. Bxg4 Bxg4 37. Rg2 Qf3 38. Qd2 h3 39. Rdg1 Rc6 40. Kh2 hxg2 41. Qxg2 Rh6+ 0-1

[Event "Leiden op-A 10th"]
[Site "Leiden"]
[Date "2016.07.16"]
[Round "2"]
[White "Rosen, Eric S"]
[Black "Van Halderen, Herman"]
[Result "1-0"]
[ECO "D02"]
[WhiteElo "2393"]
[BlackElo "2079"]
[PlyCount "55"]
[EventDate "2016.07.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 173 Extra"]
[Source "ChessBase"]
[SourceDate "2016.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2016.08.29"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. Bf4 c5 4. e3 d5 5. c3 Nc6 6. Nbd2 Bd6 7. Bg3 0-0 8. Bd3 Re8 9. Ne5 Qc7 10. f4 c4 11. Bc2 b5 12. Bh4 Be7 13. 0-0 Nd8 14. Qf3 Bb7 15. f5 Ne4 16. Bxe7 Rxe7 17. Nxe4 dxe4 18. Bxe4 exf5 19. Qxf5 Bxe4 20. Qxe4 Rb8 21. Rf3 Rb6 22. Raf1 g6 23. Qh4 Kg7 24. Ng4 h5 25. Nf6 Ree6 26. Nd5 Qd6 27. Nxb6 Qxb6 28. e4 1-0

[Event "Leiden op-A 10th"]
[Site "Leiden"]
[Date "2016.07.15"]
[Round "1"]
[White "Van Halderen, Herman"]
[Black "Sagar, Shah"]
[Result "0-1"]
[ECO "E41"]
[WhiteElo "2079"]
[BlackElo "2433"]
[PlyCount "60"]
[EventDate "2016.07.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 173 Extra"]
[Source "ChessBase"]
[SourceDate "2016.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2016.08.29"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 Nc6 6. Nf3 Bxc3+ 7. bxc3 d6 8. 0-0 e5 9. Nd2 0-0 10. Nb3 b6 11. f4 exd4 12. exd4 cxd4 13. cxd4 d5 14. c5 Nb4 15. Bb1 Ba6 16. Rf3 Re8 17. Qd2 Nc6 18. Bd3 Ne4 19. Qd1 Bc4 20. Be3 Nb4 21. Bf1 Qf6 22. a3 Nc6 23. cxb6 Bxb3 24. Qxb3 Nxd4 25. Qxd5 Nxf3+ 26. gxf3 Qxa1 27. fxe4 Rad8 28. Qc6 axb6 29. Bxb6 Re6 30. Qc7 Rg6+ 0-1

[Event "Leiden op-A 9th"]
[Site "Leiden"]
[Date "2015.07.26"]
[Round "9"]
[White "Van Overdam, Julian"]
[Black "Van Halderen, Herman"]
[Result "1-0"]
[ECO "B23"]
[WhiteElo "2367"]
[BlackElo "2052"]
[PlyCount "55"]
[EventDate "2015.07.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 167 Extra"]
[Source "ChessBase"]
[SourceDate "2015.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2015.09.14"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. f4 g6 4. Nf3 Bg7 5. Bb5 Nd4 6. 0-0 a6 7. Bd3 e6 8. e5 Ne7 9. Ne4 Nxf3+ 10. Qxf3 Nf5 11. g4 d5 12. Nxc5 Nd4 13. Qf2 Nc6 14. c3 b6 15. Nb3 Bb7 16. Bc2 d4 17. Be4 Rb8 18. d3 0-0 19. Bd2 Qd7 20. Nxd4 Nxd4 21. Qxd4 Qxd4+ 22. cxd4 Rfd8 23. Be3 b5 24. Rac1 Bf8 25. f5 exf5 26. gxf5 Bd5 27. Bxd5 Rxd5 28. Rc7 1-0

[Event "Leiden op-A 9th"]
[Site "Leiden"]
[Date "2015.07.25"]
[Round "8"]
[White "Van Halderen, Herman"]
[Black "Jongste, David"]
[Result "1-0"]
[ECO "E99"]
[WhiteElo "2052"]
[BlackElo "1976"]
[PlyCount "69"]
[EventDate "2015.07.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 167 Extra"]
[Source "ChessBase"]
[SourceDate "2015.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2015.09.14"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. Nf3 e5 7. 0-0 Nc6 8. d5 Ne7 9. Ne1 Nd7 10. Be3 f5 11. f3 f4 12. Bf2 g5 13. a4 a5 14. Nd3 b6 15. b4 axb4 16. Nxb4 Nf6 17. Nb5 h5 18. Nd3 g4 19. a5 bxa5 20. c5 Rf7 21. Be1 Ng6 22. Rxa5 Rxa5 23. Bxa5 Bf8 24. Qc2 g3 25. cxd6 Ng4 26. fxg4 Qh4 27. h3 hxg4 28. Ne1 f3 29. Bxf3 Bh6 30. Bd2 Nf4 31. Bxg4 Bxg4 32. Rxf4 Rxf4 33. Bxf4 Bxf4 34. hxg4 Be3+ 35. Kf1 1-0

[Event "Leiden op-A 9th"]
[Site "Leiden"]
[Date "2015.07.24"]
[Round "7"]
[White "Van der Marel, Lambertus"]
[Black "Van Halderen, Herman"]
[Result "1-0"]
[ECO "A01"]
[WhiteElo "2161"]
[BlackElo "2052"]
[PlyCount "71"]
[EventDate "2015.07.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 167 Extra"]
[Source "ChessBase"]
[SourceDate "2015.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2015.09.14"]
[SourceQuality "1"]

1. b3 e5 2. Bb2 Nc6 3. e3 d5 4. Bb5 Bd6 5. f4 f6 6. Qh5+ g6 7. Qf3 Nge7 8. fxe5 fxe5 9. Qf6 Rf8 10. Qh4 Nf5 11. Qxd8+ Kxd8 12. Nc3 Nce7 13. 0-0-0 c6 14. Be2 e4 15. Rf1 Re8 16. Nh3 Be6 17. Ng5 Bg8 18. g4 Nh4 19. Nd1 Kd7 20. Bf6 h6 21. Nxe4 dxe4 22. Bxh4 g5 23. Bg3 Ba3+ 24. Kb1 Nd5 25. h4 a5 26. hxg5 hxg5 27. Rh5 Be7 28. Be5 a4 29. Nf2 axb3 30. axb3 Bb4 31. Bd4 Bxd2 32. c4 Ra3 33. cxd5 c5 34. Bb5+ Kd8 35. Bf6+ Re7 36. Kb2 1-0

[Event "Leiden op-A 9th"]
[Site "Leiden"]
[Date "2015.07.23"]
[Round "6"]
[White "Van Halderen, Herman"]
[Black "Happel, Henk"]
[Result "1-0"]
[ECO "A90"]
[WhiteElo "2052"]
[BlackElo "2107"]
[PlyCount "67"]
[EventDate "2015.07.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 167 Extra"]
[Source "ChessBase"]
[SourceDate "2015.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2015.09.14"]
[SourceQuality "1"]

1. d4 e6 2. c4 f5 3. Nc3 Nf6 4. Nf3 d5 5. g3 c6 6. Bg2 Bd6 7. 0-0 0-0 8. b3 Qe7 9. Bb2 Nbd7 10. Qc2 Ne4 11. e3 Nxc3 12. Bxc3 b6 13. Rfe1 Bb7 14. Rad1 Rac8 15. Qb2 Nf6 16. Re2 Ba6 17. Ne5 Ne4 18. Rc2 Bxe5 19. dxe5 dxc4 20. bxc4 Rfd8 21. Rdc1 Rd7 22. Be1 Rcd8 23. Bf1 c5 24. h4 Rd1 25. Be2 Rxc1 26. Rxc1 g5 27. f3 Nxg3 28. Bxg3 gxh4 29. Bf2 Kh8 30. Kh2 Rg8 31. Qd2 h3 32. Rg1 Rxg1 33. Bxg1 Qg5 34. Bf1 1-0

[Event "Leiden op-A 9th"]
[Site "Leiden"]
[Date "2015.07.21"]
[Round "5"]
[White "Wilschut, Peter"]
[Black "Van Halderen, Herman"]
[Result "1-0"]
[ECO "A28"]
[WhiteElo "2238"]
[BlackElo "2052"]
[PlyCount "83"]
[EventDate "2015.07.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 167 Extra"]
[Source "ChessBase"]
[SourceDate "2015.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2015.09.14"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. e3 Bb4 5. Qc2 Bxc3 6. bxc3 0-0 7. e4 d6 8. d3 h6 9. h3 Qe7 10. Be3 Nd8 11. g3 Ne6 12. Bg2 Nc5 13. 0-0 Bd7 14. Rab1 b6 15. Nh4 Rae8 16. Rfe1 Qd8 17. Bxc5 dxc5 18. Rbd1 Qc8 19. Kh2 Nh7 20. Qe2 Ng5 21. f4 Nh7 22. fxe5 Ng5 23. Qf1 Rxe5 24. d4 Ree8 25. Nf5 f6 26. h4 Nf7 27. Qf4 g5 28. Qf3 Bxf5 29. exf5 Kg7 30. Bh3 Qa6 31. Qh5 Qxa2+ 32. Bg2 Rxe1 33. Qg6+ Kh8 34. Qxf6+ Kg8 35. Qg6+ Kh8 36. Qf6+ Kg8 37. Qg6+ Kh8 38. Rxe1 Qxc4 39. Qf6+ Kg8 40. Qg6+ Kh8 41. f6 Rg8 42. Re8 1-0

[Event "Leiden op-A 9th"]
[Site "Leiden"]
[Date "2015.07.20"]
[Round "4"]
[White "Van Halderen, Herman"]
[Black "Palit, Somak"]
[Result "1-0"]
[ECO "A04"]
[WhiteElo "2052"]
[BlackElo "2360"]
[PlyCount "59"]
[EventDate "2015.07.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 167 Extra"]
[Source "ChessBase"]
[SourceDate "2015.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2015.09.14"]
[SourceQuality "1"]

1. d4 b5 2. e4 Bb7 3. Bxb5 Bxe4 4. Nf3 e6 5. 0-0 Nf6 6. Nc3 Bb7 7. Re1 Be7 8. Bf4 0-0 9. Bd3 d6 10. Ng5 Nbd7 11. Re3 h6 12. Nge4 Nxe4 13. Nxe4 f5 14. Ng3 Bg5 15. Bxg5 Qxg5 16. Rxe6 f4 17. Rg6 Qh4 18. Nf5 Rxf5 19. Bxf5 Nf8 20. Rg4 Qf6 21. Rxf4 Kh8 22. d5 Ng6 23. Rb4 Qxf5 24. Rxb7 Rf8 25. Qd2 Nf4 26. f3 Qg5 27. Kh1 Re8 28. g3 Qxd5 29. Qxd5 Nxd5 30. c4 1-0

[Event "Leiden op-A 9th"]
[Site "Leiden"]
[Date "2015.07.19"]
[Round "3"]
[White "Visser, Henk Jan"]
[Black "Van Halderen, Herman"]
[Result "1/2-1/2"]
[ECO "B90"]
[WhiteElo "2272"]
[BlackElo "2052"]
[PlyCount "126"]
[EventDate "2015.07.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 167 Extra"]
[Source "ChessBase"]
[SourceDate "2015.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2015.09.14"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3 Be6 8. f3 Nbd7 9. Qd2 Be7 10. 0-0-0 0-0 11. Kb1 b5 12. g4 b4 13. Ne2 a5 14. g5 Nh5 15. Ng3 Nf4 16. h4 a4 17. Nd4 b3 18. Nc6 bxc2+ 19. Qxc2 Qe8 20. Nf5 Bxf5 21. exf5 Nh5 22. f6 gxf6 23. Rg1 Kh8 24. Qe4 Ng7 25. Nxe7 Qxe7 26. gxf6 Nxf6 27. Bh6 Ngh5 28. Qf5 Rg8 29. Rg5 Ng3 30. Rxg3 Rxg3 31. Bg5 Rxg5 32. hxg5 Ng8 33. Bd3 f6 34. Rh1 Ra7 35. Qc8 f5 36. g6 Rc7 37. Qxf5 h6 38. Qe4 Qg5 39. Qxa4 Qd2 40. Rd1 Qe3 41. Qe4 Qc5 42. f4 Nf6 43. Qf5 Kg7 44. fxe5 Qxe5 45. a3 Rb7 46. Qxe5 dxe5 47. Bf5 e4 48. Rg1 Re7 49. Kc2 Re5 50. Bh3 Nd5 51. Bf1 e3 52. Bc4 Nf4 53. Kc3 h5 54. b4 h4 55. b5 h3 56. b6 Re7 57. a4 e2 58. Re1 h2 59. Bxe2 Rxe2 60. Rh1 Nd5+ 61. Kd3 Rb2 62. a5 Nxb6 63. axb6 Rxb6 1/2-1/2

[Event "Leiden op-A 9th"]
[Site "Leiden"]
[Date "2015.07.17"]
[Round "1"]
[White "Van Halderen, Herman"]
[Black "Milov, Leonid"]
[Result "0-1"]
[ECO "A56"]
[WhiteElo "2052"]
[BlackElo "2462"]
[PlyCount "75"]
[EventDate "2015.07.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 167 Extra"]
[Source "ChessBase"]
[SourceDate "2015.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2015.09.14"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. d5 a6 4. Qc2 g6 5. e4 d6 6. Nc3 Bg7 7. Nf3 0-0 8. Nd2 e6 9. a4 Nh5 10. Be2 Nf4 11. Bf3 Qf6 12. Nf1 Nd7 13. Ne2 Nh3 14. Ra3 Ne5 15. Nd2 Ng5 16. h4 Ngxf3+ 17. Nxf3 exd5 18. cxd5 Re8 19. h5 Bd7 20. Kf1 Nxf3 21. Rxf3 Qe7 22. hxg6 fxg6 23. Ng3 b5 24. a5 b4 25. Kg1 Rab8 26. Rf4 Rf8 27. Ne2 Rxf4 28. Bxf4 Rb5 29. f3 Rxa5 30. g4 Ra2 31. Bc1 Qf6 32. Kg2 Rxb2 33. Bxb2 Qxb2 34. Qxb2 Bxb2 35. Rb1 Bg7 36. Nc1 a5 37. Kg3 g5 38. Ra1 0-1

[Event "Leiden op-A 8th"]
[Site "Leiden"]
[Date "2014.07.18"]
[Round "7"]
[White "Bitalzadeh, Ali"]
[Black "Van Halderen, Herman"]
[Result "1-0"]
[ECO "A28"]
[WhiteElo "2416"]
[BlackElo "2072"]
[PlyCount "47"]
[EventDate "2014.07.11"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 161 Extra"]
[Source "ChessBase"]
[SourceDate "2014.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2014.08.29"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 e5 3. Nf3 Nc6 4. e3 Bb4 5. Qc2 0-0 6. Nd5 Bc5 7. a3 a5 8. Ng5 g6 9. h4 d6 10. Bd3 Nh5 11. b3 Nb8 12. Nc3 c6 13. Nce4 Bb6 14. Be2 Ng7 15. c5 dxc5 16. h5 h6 17. Nf3 g5 18. Nxe5 Re8 19. Bb2 Bf5 20. Qc3 f6 21. Ng4 Bxe4 22. Nxf6+ Kf7 23. Nxe4 Ne6 24. Bc4 1-0

[Event "Leiden op-A 8th"]
[Site "Leiden"]
[Date "2014.07.14"]
[Round "4"]
[White "Van der Auweraert, Elwin"]
[Black "Van Halderen, Herman"]
[Result "1-0"]
[ECO "B50"]
[WhiteElo "2198"]
[BlackElo "2072"]
[PlyCount "91"]
[EventDate "2014.07.11"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 161 Extra"]
[Source "ChessBase"]
[SourceDate "2014.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2014.08.29"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Nc3 Nf6 4. Bc4 e6 5. 0-0 a6 6. Re1 b5 7. Bf1 Be7 8. a4 b4 9. Na2 0-0 10. d3 Nc6 11. Bg5 h6 12. Bh4 Ne8 13. Bxe7 Qxe7 14. c3 e5 15. cxb4 cxb4 16. d4 Bg4 17. d5 Bxf3 18. gxf3 Nd4 19. Nxb4 f5 20. Nc6 Qg5+ 21. Bg2 Nf6 22. Nxd4 exd4 23. Qc1 f4 24. Qd2 Nd7 25. Qxd4 Ne5 26. Kh1 Rf6 27. Rg1 Qh5 28. Qc3 Raf8 29. b4 Kh7 30. b5 Rg6 31. Rab1 Rg5 32. bxa6 Qh4 33. Rb2 Rf6 34. Qc8 Rfg6 35. Rb8 Qxh2+ 36. Kxh2 Rh5+ 37. Qh3 Rxh3+ 38. Kxh3 Rg5 39. Kh2 Rh5+ 40. Bh3 Nxf3+ 41. Kg2 Nd2 42. Bf5+ g6 43. Rb7+ Kh8 44. a7 Rg5+ 45. Bg4 Rxg4+ 46. Kh3 1-0

[Event "Leiden op-A 8th"]
[Site "Leiden"]
[Date "2014.07.11"]
[Round "1"]
[White "Van Halderen, Herman"]
[Black "Van der Wiel, John"]
[Result "1/2-1/2"]
[ECO "E99"]
[WhiteElo "2072"]
[BlackElo "2424"]
[PlyCount "50"]
[EventDate "2014.07.11"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 161 Extra"]
[Source "ChessBase"]
[SourceDate "2014.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2014.08.29"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. Nf3 e5 7. 0-0 Nc6 8. d5 Ne7 9. Ne1 Ne8 10. Be3 f5 11. f3 f4 12. Bf2 h5 13. c5 g5 14. a4 Ng6 15. a5 Nf6 16. cxd6 cxd6 17. Nb5 g4 18. Nxa7 g3 19. Bb6 Qe7 20. Nxc8 Rfxc8 21. Bb5 Nf8 22. Nd3 N6d7 23. Bxd7 Nxd7 24. Qb3 gxh2+ 25. Kh1 Bf6 1/2-1/2

[Event "Leiden LCT op-A 7th"]
[Site "Leiden"]
[Date "2013.07.21"]
[Round "9"]
[White "Van Halderen, Herman"]
[Black "Serdijn Koster, Adinda"]
[Result "1-0"]
[ECO "D20"]
[WhiteElo "2071"]
[BlackElo "2048"]
[PlyCount "73"]
[EventDate "2013.07.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 155 Extra"]
[Source "ChessBase"]
[SourceDate "2013.08.26"]
[SourceVersion "1"]
[SourceVersionDate "2013.08.26"]
[SourceQuality "1"]

1. d4 d5 2. c4 dxc4 3. e4 e5 4. Nf3 exd4 5. Bxc4 Nc6 6. 0-0 Bc5 7. Qb3 Qd7 8. Bd2 a6 9. Qc2 Qe7 10. b3 Bg4 11. Bd5 Bxf3 12. Bxc6+ bxc6 13. gxf3 Qd6 14. Kh1 Ne7 15. b4 Bb6 16. Rg1 0-0 17. Qd3 c5 18. bxc5 Bxc5 19. Bg5 Ng6 20. Nd2 h6 21. Nc4 Qe6 22. Bd2 Be7 23. Rg2 Qh3 24. Rg3 Qh5 25. Rag1 Rfd8 26. f4 Bf8 27. f5 Nh4 28. Rg4 Kh8 29. f4 Rab8 30. Be1 Be7 31. Bxh4 Bxh4 32. Qh3 g5 33. fxg6 fxg6 34. Rxh4 Qe2 35. Rxh6+ Kg7 36. Rgxg6+ Kf8 37. Qf5+ 1-0

[Event "Leiden LCT op-A 7th"]
[Site "Leiden"]
[Date "2013.07.20"]
[Round "8"]
[White "Wiersma, Eelke"]
[Black "Van Halderen, Herman"]
[Result "1-0"]
[ECO "E46"]
[WhiteElo "2374"]
[BlackElo "2071"]
[PlyCount "87"]
[EventDate "2013.07.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 155 Extra"]
[Source "ChessBase"]
[SourceDate "2013.08.26"]
[SourceVersion "1"]
[SourceVersionDate "2013.08.26"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Nge2 d5 6. a3 Bd6 7. Ng3 c5 8. dxc5 Bxc5 9. b4 Be7 10. Bb2 a5 11. b5 b6 12. cxd5 exd5 13. Be2 Ra7 14. 0-0 Be6 15. Bf3 Rd7 16. Na4 Ne4 17. Nh5 f6 18. Nf4 Bf7 19. Qc2 Rc7 20. Qd1 Rd7 21. Qd3 Re8 22. Rfd1 Bd6 23. Bg4 Bxf4 24. exf4 Rde7 25. Bd4 Rb7 26. Rac1 Bg6 27. Qh3 Nd6 28. Qb3 Nc4 29. Nc3 Rbe7 30. Nxd5 Qxd5 31. Be3 Qb7 32. Qxc4+ Bf7 33. Qd4 Bb3 34. Rd3 a4 35. h3 Re4 36. Qxb6 Qe7 37. Qc5 Qf7 38. Bf3 Nd7 39. Qd6 R4e7 40. b6 Qg6 41. b7 f5 42. Qxg6 hxg6 43. Bc6 Be6 44. Rcd1 1-0

[Event "Leiden LCT op-A 7th"]
[Site "Leiden"]
[Date "2013.07.19"]
[Round "7"]
[White "Van Halderen, Herman"]
[Black "Vistisen, Lars"]
[Result "1-0"]
[ECO "A69"]
[WhiteElo "2071"]
[BlackElo "2177"]
[PlyCount "85"]
[EventDate "2013.07.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 155 Extra"]
[Source "ChessBase"]
[SourceDate "2013.08.26"]
[SourceVersion "1"]
[SourceVersionDate "2013.08.26"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 g6 6. Nf3 d6 7. Nd2 a6 8. a4 Nbd7 9. e4 Rb8 10. Be2 Bg7 11. 0-0 0-0 12. f4 Re8 13. Kh1 h5 14. h3 Qe7 15. a5 b5 16. axb6 Nxb6 17. Bf3 Ng4 18. Qe1 Nh6 19. Qg3 Kh7 20. Bd1 Nd7 21. Nf3 Kh8 22. Bc2 Rb4 23. e5 dxe5 24. f5 h4 25. Qf2 Nxf5 26. Bxf5 gxf5 27. Ng5 Nf8 28. d6 Qb7 29. Qe2 Ng6 30. Rd1 Rd4 31. Be3 Kg8 32. Na4 Qc6 33. Bxd4 exd4 34. Qc4 Be6 35. Qxc5 Qxc5 36. Nxc5 Bd5 37. d7 Rd8 38. Rxa6 Nf4 39. Re1 Ne6 40. Rd6 Be4 41. Ngxe6 fxe6 42. Nxe6 Be5 43. Nxd8 1-0

[Event "Leiden LCT op-A 7th"]
[Site "Leiden"]
[Date "2013.07.18"]
[Round "6"]
[White "De Bruijne, Arian"]
[Black "Van Halderen, Herman"]
[Result "0-1"]
[ECO "B56"]
[WhiteElo "1941"]
[BlackElo "2071"]
[PlyCount "38"]
[EventDate "2013.07.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 155 Extra"]
[Source "ChessBase"]
[SourceDate "2013.08.26"]
[SourceVersion "1"]
[SourceVersionDate "2013.08.26"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. Nge2 d6 4. d4 cxd4 5. Nxd4 Nf6 6. f3 e5 7. Nb3 Be6 8. Bg5 Be7 9. Qd2 h6 10. Bxf6 Bxf6 11. Rd1 0-0 12. Be2 Bg5 13. Qxd6 Nd4 14. Qxe5 Nxc2+ 15. Kf2 Qb6+ 16. Kg3 Be3 17. h3 g5 18. Nd5 Bxd5 19. Kg4 Bf4 0-1

[Event "Leiden LCT op-A 7th"]
[Site "Leiden"]
[Date "2013.07.16"]
[Round "5"]
[White "Van Halderen, Herman"]
[Black "Blankert, Willem"]
[Result "1/2-1/2"]
[ECO "A85"]
[WhiteElo "2071"]
[BlackElo "2010"]
[PlyCount "42"]
[EventDate "2013.07.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 155 Extra"]
[Source "ChessBase"]
[SourceDate "2013.08.26"]
[SourceVersion "1"]
[SourceVersionDate "2013.08.26"]
[SourceQuality "1"]

1. d4 e6 2. c4 f5 3. Nf3 Nf6 4. Nc3 Bb4 5. Qb3 c5 6. Bd2 0-0 7. e3 b6 8. a3 Bxc3 9. Bxc3 Na6 10. Be2 Bb7 11. 0-0 Qe7 12. Rad1 d6 13. Qc2 Ne4 14. Nd2 Nxc3 15. Qxc3 Rad8 16. f4 Nc7 17. Bf3 Ne8 18. b4 Nf6 19. Qb3 Bxf3 20. Nxf3 Ne4 21. Nd2 Nf6 1/2-1/2

[Event "Leiden LCT op-A 7th"]
[Site "Leiden"]
[Date "2013.07.15"]
[Round "4"]
[White "Lecomte, Robin"]
[Black "Van Halderen, Herman"]
[Result "1-0"]
[ECO "B23"]
[WhiteElo "1930"]
[BlackElo "2071"]
[PlyCount "65"]
[EventDate "2013.07.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 155 Extra"]
[Source "ChessBase"]
[SourceDate "2013.08.26"]
[SourceVersion "1"]
[SourceVersionDate "2013.08.26"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. Bb5 Nd4 4. Bc4 e6 5. Nge2 g6 6. d3 Bg7 7. 0-0 a6 8. f4 Ne7 9. e5 d5 10. exd6 Qxd6 11. Ne4 Qc6 12. c3 Ndf5 13. g4 b5 14. Bb3 Bb7 15. Bc2 Rd8 16. Qe1 Nd6 17. Qf2 f5 18. Nxd6+ Rxd6 19. Ng3 h5 20. Be3 h4 21. Ne4 Rd5 22. Rae1 c4 23. dxc4 bxc4 24. Ng5 Rd2 25. Ba4 Qxa4 26. Bxd2 Qc6 27. Qf3 Qd7 28. Qe3 Qd5 29. Rf3 fxg4 30. Nxe6 Qd6 31. Nxg7+ Kf7 32. Rff1 Rc8 33. Qe6+ 1-0

[Event "Leiden LCT op-A 7th"]
[Site "Leiden"]
[Date "2013.07.14"]
[Round "3"]
[White "Van Halderen, Herman"]
[Black "Orlova, Yelizaveta"]
[Result "1-0"]
[ECO "A44"]
[WhiteElo "2071"]
[BlackElo "1942"]
[PlyCount "47"]
[EventDate "2013.07.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 155 Extra"]
[Source "ChessBase"]
[SourceDate "2013.08.26"]
[SourceVersion "1"]
[SourceVersionDate "2013.08.26"]
[SourceQuality "1"]

1. d4 c5 2. d5 e5 3. e4 d6 4. Nc3 a6 5. a4 b6 6. Be2 Be7 7. Nf3 Nf6 8. 0-0 Nbd7 9. Kh1 Nf8 10. Ne1 Ng6 11. Nd3 0-0 12. g3 Bh3 13. Rg1 Bd7 14. f4 b5 15. f5 Nh8 16. Bf3 Ne8 17. g4 b4 18. Ne2 Bg5 19. Bxg5 Qxg5 20. Qe1 Qe3 21. Rg3 f6 22. Bg2 Qh6 23. Rh3 Qg5 24. Ng1 1-0

[Event "Leiden LCT op-A 7th"]
[Site "Leiden"]
[Date "2013.07.13"]
[Round "2"]
[White "Braggaar, Pim"]
[Black "Van Halderen, Herman"]
[Result "1/2-1/2"]
[ECO "B50"]
[WhiteElo "1987"]
[BlackElo "2071"]
[PlyCount "130"]
[EventDate "2013.07.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 155 Extra"]
[Source "ChessBase"]
[SourceDate "2013.08.26"]
[SourceVersion "1"]
[SourceVersionDate "2013.08.26"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. Nf3 d6 4. h3 Nf6 5. Bb5 Bd7 6. d3 a6 7. Bxc6 Bxc6 8. 0-0 e6 9. Re1 Be7 10. Ne2 0-0 11. Ng3 Qc7 12. c3 b5 13. Qc2 Rac8 14. Bf4 Qb7 15. Nh2 Rfe8 16. Ng4 Nxg4 17. hxg4 Bh4 18. Nf1 e5 19. Bg3 Bg5 20. f3 a5 21. Qf2 Bd8 22. Qc2 Re6 23. Bf2 Qe7 24. Ng3 Qf8 25. Nf5 d5 26. Rad1 d4 27. c4 g6 28. Ng3 Bg5 29. Re2 bxc4 30. Qxc4 Qe8 31. b3 Bb5 32. Qc2 a4 33. Be1 Qc6 34. Bd2 Be7 35. Bc1 Qa6 36. Qd2 Bh4 37. Nf1 Bd8 38. Ng3 Ba5 39. Qc2 Bb4 40. Nh1 Ra8 41. g3 axb3 42. axb3 Qa7 43. Rh2 c4 44. Nf2 cxd3 45. Nxd3 Rc6 46. Qb2 Bxd3 47. Rxd3 Rc3 48. Qb1 Qa1 49. Qxa1 Rxa1 50. Rxc3 Bxc3 51. Rc2 Rb1 52. Kf2 Rxb3 53. Ke2 Kg7 54. g5 Bb4 55. Ra2 d3+ 56. Kf2 Rb1 57. Bd2 Bc5+ 58. Kg2 Rg1+ 59. Kh3 Rf1 60. Bc3 f6 61. gxf6+ Kxf6 62. f4 Rc1 63. Bxe5+ Ke7 64. Rd2 Re1 65. Rxd3 Rxe4 1/2-1/2

[Event "Leiden LCT op-A 7th"]
[Site "Leiden"]
[Date "2013.07.12"]
[Round "1"]
[White "Van Halderen, Herman"]
[Black "Van den Doel, Erik"]
[Result "0-1"]
[ECO "E91"]
[WhiteElo "2071"]
[BlackElo "2582"]
[PlyCount "88"]
[EventDate "2013.07.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 155 Extra"]
[Source "ChessBase"]
[SourceDate "2013.08.26"]
[SourceVersion "1"]
[SourceVersionDate "2013.08.26"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. Nf3 Bg4 7. 0-0 Nfd7 8. Be3 c5 9. d5 Na6 10. Nd2 Bxe2 11. Qxe2 Nc7 12. Nb3 a6 13. a4 Rb8 14. f4 f5 15. g4 fxe4 16. Nxe4 b5 17. axb5 axb5 18. Na5 bxc4 19. Nc6 Rxb2 20. Qxb2 Bxb2 21. Nxd8 Rxd8 22. Ra2 c3 23. Bc1 Bxc1 24. Rxc1 Nxd5 25. Nxc3 Nxf4 26. Ra7 g5 27. Rb1 Kf7 28. Kf2 Nf6 29. Kf3 Ng6 30. h3 d5 31. Rc7 d4 32. Nd1 c4 33. Rb5 Nd5 34. Rcc5 c3 35. Ke4 Nf6+ 36. Kd3 Nf4+ 37. Kc2 d3+ 38. Kxc3 Ne4+ 39. Kb2 Nxc5 40. Rxc5 Nxh3 41. Kc3 d2 42. Kc2 Rd4 43. Ne3 d1Q+ 44. Nxd1 Rxg4 0-1

[Event "Leiden LCT op-A 6th"]
[Site "Leiden"]
[Date "2012.07.12"]
[Round "6"]
[White "Algera, Simon"]
[Black "Van Halderen, Herman"]
[Result "0-1"]
[ECO "A46"]
[WhiteElo "2113"]
[BlackElo "2062"]
[PlyCount "108"]
[EventDate "2012.07.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 149 Extra"]
[Source "ChessBase"]
[SourceDate "2012.08.24"]
[SourceVersion "1"]
[SourceVersionDate "2012.08.24"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. Bg5 c5 4. e3 Be7 5. c3 Nc6 6. Nbd2 h6 7. Bxf6 Bxf6 8. dxc5 0-0 9. Ne4 Be7 10. b4 b6 11. Nd4 Ne5 12. f4 bxc5 13. bxc5 f5 14. Nd6 Ng4 15. N4xf5 exf5 16. Qd5+ Kh8 17. Qxa8 Bxd6 18. cxd6 Qb6 19. Be2 Re8 20. 0-0-0 Nf6 21. Bh5 Nxh5 22. Rd4 Nf6 23. Qf3 Qa5 24. Kb2 Ne4 25. Rc1 Ba6 26. Qd1 Nc5 27. Qd2 Rc8 28. Qc2 Nd3+ 29. Rxd3 Qb5+ 30. Ka1 Qxd3 31. Qxd3 Bxd3 32. Rd1 Be4 33. Kb2 Rb8+ 34. Ka3 Bxg2 35. c4 Bc6 36. Rd3 Kh7 37. Rb3 Re8 38. Kb4 g5 39. fxg5 hxg5 40. Ra3 Rb8+ 41. Kc5 Rb7 42. Kd4 Kg6 43. Ke5 Rb4 44. Rc3 a5 45. Kd4 Rb2 46. Ra3 a4 47. h3 Rh2 48. e4 fxe4 49. Ke5 Rd2 50. Rg3 Rd3 51. Rg1 Rxh3 52. Rb1 Rd3 53. Rf1 Rf3 54. Re1 g4 0-1

[Event "Leiden LCT op-A 6th"]
[Site "Leiden"]
[Date "2012.07.10"]
[Round "5"]
[White "Ypma, Peter"]
[Black "Van Halderen, Herman"]
[Result "1-0"]
[ECO "B23"]
[WhiteElo "2175"]
[BlackElo "2062"]
[PlyCount "39"]
[EventDate "2012.07.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 149 Extra"]
[Source "ChessBase"]
[SourceDate "2012.08.24"]
[SourceVersion "1"]
[SourceVersionDate "2012.08.24"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. f4 g6 4. Nf3 Bg7 5. Bb5 e6 6. Bxc6 bxc6 7. 0-0 Ne7 8. d3 d5 9. Qe1 0-0 10. Kh1 Rb8 11. Na4 c4 12. e5 cxd3 13. cxd3 d4 14. b3 Re8 15. Ng5 Nd5 16. Ne4 f6 17. Nd6 Rf8 18. Ba3 Ne3 19. Nxc8 Qd5 20. Ne7+ 1-0

[Event "Leiden LCT op-A 6th"]
[Site "Leiden"]
[Date "2012.07.09"]
[Round "4"]
[White "Van Halderen, Herman"]
[Black "Horvath, Csaba"]
[Result "0-1"]
[ECO "E91"]
[WhiteElo "2062"]
[BlackElo "2507"]
[PlyCount "90"]
[EventDate "2012.07.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 149 Extra"]
[Source "ChessBase"]
[SourceDate "2012.08.24"]
[SourceVersion "1"]
[SourceVersionDate "2012.08.24"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. Nf3 c5 7. 0-0 Re8 8. d5 e6 9. Bg5 h6 10. Bh4 exd5 11. exd5 g5 12. Bg3 Nh5 13. Nd2 Nxg3 14. hxg3 Nd7 15. Nde4 Ne5 16. f4 gxf4 17. Rxf4 Ng6 18. Rf1 Bd4+ 19. Kh1 Kg7 20. Bh5 Re5 21. Nf6 Bf5 22. Ng4 Bxg4 23. Bxg4 Qg5 24. Qf3 f5 25. Bh3 a6 26. Ne2 Re3 27. Nxd4 cxd4 28. Qxf5 Qxf5 29. Bxf5 Ne5 30. Rad1 d3 31. g4 Nxc4 32. Rxd3 Rxd3 33. Bxd3 Nxb2 34. Be2 Re8 35. Rf2 Na4 36. Kh2 b5 37. Kg3 Re3+ 38. Kf4 Re5 39. Bf3 Nc5 40. Rc2 Kf6 41. Rc3 b4 42. Rc2 a5 43. Rd2 Re1 44. Bd1 Ne4 45. Rd4 Nc3 0-1

[Event "Leiden LCT op-A 6th"]
[Site "Leiden"]
[Date "2012.07.08"]
[Round "2"]
[White "Slingerland, Fred"]
[Black "Van Halderen, Herman"]
[Result "0-1"]
[ECO "B92"]
[WhiteElo "2360"]
[BlackElo "2062"]
[PlyCount "100"]
[EventDate "2012.07.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 149 Extra"]
[Source "ChessBase"]
[SourceDate "2012.08.24"]
[SourceVersion "1"]
[SourceVersionDate "2012.08.24"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be7 8. Bg5 0-0 9. Bxf6 Bxf6 10. Qd3 Be6 11. Rd1 Be7 12. Nd5 Bg5 13. g3 Nd7 14. h4 Bxd5 15. Qxd5 Be7 16. Qxb7 Nf6 17. Bf3 a5 18. a4 Rb8 19. Qa6 Qc8 20. Qe2 Rb4 21. 0-0 Qc7 22. Rd2 Rxa4 23. c3 Rb8 24. Nc1 Rc4 25. Rc2 d5 26. exd5 Bd6 27. Bg2 e4 28. Re1 h5 29. Qd2 a4 30. Ne2 Bc5 31. d6 Bxd6 32. Nd4 Bc5 33. Nf5 Ng4 34. Qg5 g6 35. Bf1 Kf8 36. Qf4 Bxf2+ 37. Rxf2 e3 38. Nxe3 Rxf4 39. Rxf4 Rxb2 40. Bc4 Nxe3 41. Rxe3 f5 42. Re6 Kg7 43. Ra6 Qb7 44. Bf1 Qe7 45. Rf3 a3 46. c4 Qc5+ 47. Kh1 a2 48. Raa3 Rf2 49. Bg2 Rxf3 50. Bxf3 Qxa3 0-1

[Event "Leiden LCT op-A 6th"]
[Site "Leiden"]
[Date "2012.07.08"]
[Round "3"]
[White "Van Halderen, Herman"]
[Black "Sundararajan, Kidambi"]
[Result "1/2-1/2"]
[ECO "D90"]
[WhiteElo "2062"]
[BlackElo "2459"]
[PlyCount "88"]
[EventDate "2012.07.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 149 Extra"]
[Source "ChessBase"]
[SourceDate "2012.08.24"]
[SourceVersion "1"]
[SourceVersionDate "2012.08.24"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. Bd2 Bg7 6. e4 Nb6 7. Be3 0-0 8. Be2 Nc6 9. Nf3 Bg4 10. d5 Bxf3 11. gxf3 Na5 12. Bd4 Qd6 13. Bxg7 Kxg7 14. Qd2 c6 15. Nd1 Nac4 16. Bxc4 Nxc4 17. Qc3+ Ne5 18. f4 Qb4 19. Qxb4 Nd3+ 20. Ke2 Nxb4 21. a3 Na6 22. dxc6 bxc6 23. Rc1 c5 24. Ne3 Rab8 25. Rc2 Nc7 26. f5 e6 27. fxg6 hxg6 28. Rd1 Rh8 29. Rd7 Ne8 30. e5 Rxh2 31. Rxa7 Rh5 32. Nc4 Rh4 33. Rc3 Re4+ 34. Kf3 Rd4 35. a4 g5 36. a5 Kg6 37. a6 Rb4 38. b3 Rd8 39. Ke2 Ng7 40. Nd2 Nf5 41. Rxc5 Nd4+ 42. Ke1 Nxb3 43. Nxb3 Rxb3 44. Rcc7 Rd5 1/2-1/2

[Event "Leiden LCT op-A 6th"]
[Site "Leiden"]
[Date "2012.07.06"]
[Round "1"]
[White "Van Halderen, Herman"]
[Black "Lalith, Babu MR"]
[Result "1-0"]
[ECO "E52"]
[WhiteElo "2062"]
[BlackElo "2529"]
[PlyCount "51"]
[EventDate "2012.07.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 149 Extra"]
[Source "ChessBase"]
[SourceDate "2012.08.24"]
[SourceVersion "1"]
[SourceVersionDate "2012.08.24"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Bd3 d5 6. Nf3 b6 7. a3 Bd6 8. e4 dxe4 9. Nxe4 Bb7 10. Nxf6+ Qxf6 11. Bg5 Bxf3 12. Qd2 Bf4 13. Bxf4 Bxg2 14. Rg1 Nc6 15. Rxg2 Nxd4 16. Qe3 Rfe8 17. 0-0-0 e5 18. Bg5 Qe6 19. Qe4 g6 20. h4 c6 21. h5 Nb3+ 22. Kb1 Nc5 23. Qh4 e4 24. Be2 b5 25. hxg6 fxg6 26. Rh1 1-0

[Event "Leiden LCT op-A 5th"]
[Site "Leiden"]
[Date "2011.07.15"]
[Round "7"]
[White "Van Halderen, Herman"]
[Black "Senlle Caride, Miguel"]
[Result "0-1"]
[ECO "A29"]
[WhiteElo "2081"]
[BlackElo "2271"]
[PlyCount "70"]
[EventDate "2011.07.08"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 143 Extra"]
[Source "ChessBase"]
[SourceDate "2011.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2011.08.29"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 e5 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Nb6 7. 0-0 Be7 8. a3 0-0 9. b4 a6 10. d3 Re8 11. Ne4 Bg4 12. Bb2 Bf8 13. h3 Bh5 14. Rc1 Qd7 15. Kh2 Nd4 16. Bxd4 exd4 17. Nc5 Bxc5 18. Rxc5 Bxf3 19. Bxf3 c6 20. Be4 Qd6 21. e3 Rad8 22. Rh5 g6 23. Rh4 f5 24. Bxf5 gxf5 25. Rxd4 Qf6 26. Rh4 Re7 27. Qc2 Red7 28. d4 Nd5 29. Rh5 Rf8 30. Rg1 Rg7 31. Rg2 Kh8 32. Qd3 Qg6 33. Rh4 Rfg8 34. Qd2 Qg5 35. Rg1 Qxh4 0-1

[Event "Leiden LCT op-A 5th"]
[Site "Leiden"]
[Date "2011.07.14"]
[Round "6"]
[White "Feiner, Reinier"]
[Black "Van Halderen, Herman"]
[Result "0-1"]
[ECO "B93"]
[BlackElo "2081"]
[PlyCount "60"]
[EventDate "2011.07.08"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 143 Extra"]
[Source "ChessBase"]
[SourceDate "2011.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2011.08.29"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f4 e5 7. Nf3 Nbd7 8. Bc4 Be7 9. 0-0 b5 10. Bd5 Rb8 11. Be3 b4 12. Na4 Nxd5 13. exd5 0-0 14. Qd2 Qa5 15. b3 e4 16. Ng5 Nf6 17. c4 bxc3 18. Nxc3 Bf5 19. Rac1 Bd8 20. h3 h6 21. g4 Bxg4 22. hxg4 Nxg4 23. Bd4 hxg5 24. Qe2 Bb6 25. Qxe4 Qb4 26. Rcd1 Qxc3 27. Bxb6 Qg3+ 28. Qg2 Qxg2+ 29. Kxg2 Rxb6 30. Kg3 Ne3 0-1

[Event "Leiden LCT op-A 5th"]
[Site "Leiden"]
[Date "2011.07.12"]
[Round "5"]
[White "Van Halderen, Herman"]
[Black "Mashinskaya, Iulia"]
[Result "0-1"]
[ECO "D17"]
[WhiteElo "2081"]
[BlackElo "2333"]
[PlyCount "140"]
[EventDate "2011.07.08"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 143 Extra"]
[Source "ChessBase"]
[SourceDate "2011.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2011.08.29"]
[SourceQuality "1"]

1. c4 c6 2. Nf3 Nf6 3. d4 d5 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 e6 7. f3 Bb4 8. e4 Bxe4 9. fxe4 Nxe4 10. Bd2 Qxd4 11. Nxe4 Qxe4+ 12. Qe2 Bxd2+ 13. Kxd2 Qd5+ 14. Kc2 Na6 15. Nxc4 Ke7 16. Qe5 f6 17. Qxd5 cxd5 18. Na5 Rac8+ 19. Kb1 Nb4 20. Nxb7 Rc7 21. Na5 Rhc8 22. Be2 d4 23. Ra3 Rc2 24. Re1 R2c7 25. Rb3 Nc2 26. Rd1 e5 27. Ba6 Ne3 28. Rxe3 dxe3 29. Bxc8 Rxc8 30. Re1 Rc5 31. Nb3 Rc4 32. a5 Re4 33. Kc2 f5 34. Kd3 Rg4 35. Re2 f4 36. Ke4 Kd6 37. Nc1 Rg6 38. Nd3 Re6 39. b4 g5 40. h3 Re8 41. Rc2 Rb8 42. Rc4 h5 43. Rc1 Rb5 44. Rc8 e2 45. Rc1 Rd5 46. Nf2 Rd4+ 47. Kf3 Rxb4 48. Re1 Ra4 49. Ne4+ Ke7 50. Rxe2 Ra3+ 51. Kf2 g4 52. hxg4 hxg4 53. Nd2 g3+ 54. Kf1 Rxa5 55. Re4 Kf6 56. Ke2 Kf5 57. Rb4 Ra2 58. Kd3 a5 59. Rb5 Ra3+ 60. Kc2 a4 61. Kd1 Ra2 62. Nf3 a3 63. Rxe5+ Kf6 64. Re4 Rxg2 65. Rxf4+ Ke7 66. Ra4 a2 67. Kc1 Rf2 68. Ne1 Re2 69. Kd1 Rb2 70. Nc2 g2 0-1

[Event "Leiden LCT op-A 5th"]
[Site "Leiden"]
[Date "2011.07.08"]
[Round "1"]
[White "Van Halderen, Herman"]
[Black "Tiviakov, Sergei"]
[Result "0-1"]
[ECO "A29"]
[WhiteElo "2081"]
[BlackElo "2623"]
[PlyCount "58"]
[EventDate "2011.07.08"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 143 Extra"]
[Source "ChessBase"]
[SourceDate "2011.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2011.08.29"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nb6 6. Nf3 Nc6 7. 0-0 Be7 8. b3 0-0 9. Bb2 f5 10. d3 Bf6 11. e4 f4 12. Ne2 fxg3 13. fxg3 Bg4 14. h3 Bxf3 15. Rxf3 Qe7 16. Qc2 Rad8 17. Rd1 Bg5 18. Rdf1 Rxf3 19. Rxf3 Qd6 20. a3 a5 21. Kh2 Bf6 22. Qc1 Nd7 23. b4 axb4 24. axb4 Nxb4 25. d4 exd4 26. Nxd4 Ne5 27. Rb3 Nbd3 28. Qa1 Nxb2 29. Nf5 Qd2 0-1

[Event "Leiden LCT op-A 4th"]
[Site "Leiden"]
[Date "2010.07.10"]
[Round "2"]
[White "Van Halderen, Herman"]
[Black "Michielsen, Joost"]
[Result "0-1"]
[ECO "A21"]
[WhiteElo "2071"]
[BlackElo "2397"]
[PlyCount "70"]
[EventDate "2010.07.09"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 137 Extra"]
[Source "ChessBase"]
[SourceDate "2010.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2010.09.01"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Bb4 3. e3 Bxc3 4. bxc3 d6 5. d4 Nd7 6. e4 Ngf6 7. Bd3 0-0 8. Nf3 Re8 9. 0-0 exd4 10. Bg5 dxc3 11. Qc2 h6 12. Bh4 Nc5 13. e5 dxe5 14. Bh7+ Kh8 15. Rad1 Qe7 16. Rd5 e4 17. Re5 Qf8 18. Bxf6 gxf6 19. Rxe4 Nxe4 20. Bxe4 Qb4 21. Qd3 Qd6 22. Qc2 c6 23. Rd1 Qf4 24. Rd4 c5 25. g3 Qg4 26. h3 Qe6 27. Bd5 Qf5 28. Be4 Rxe4 29. Rxe4 Qxf3 30. Rf4 Qc6 31. Qxc3 Kg7 32. g4 b6 33. h4 Bb7 34. f3 Qd6 35. Qc1 Rd8 0-1

[Event "Leiden LCT op 3rd"]
[Site "Leiden"]
[Date "2009.07.13"]
[Round "4"]
[White "Van Halderen, Herman"]
[Black "Wantola, Ivo"]
[Result "0-1"]
[ECO "B36"]
[WhiteElo "2133"]
[BlackElo "2336"]
[PlyCount "44"]
[EventDate "2009.07.10"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 131 Extra"]
[Source "ChessBase"]
[SourceDate "2009.09.03"]
[SourceVersion "2"]
[SourceVersionDate "2009.09.16"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 c5 3. Nf3 g6 4. d4 cxd4 5. Nxd4 Nc6 6. e4 Nxd4 7. Qxd4 Bg7 8. Be2 0-0 9. Qd3 d6 10. 0-0 Be6 11. f3 Rc8 12. b3 b5 13. Nxb5 Nxe4 14. fxe4 Bxa1 15. Be3 Be5 16. Nxa7 Rc7 17. Bb6 Qa8 18. Qe3 Rb7 19. a4 Rxb6 20. Qxb6 Qxe4 21. Bf3 Bd4+ 22. Kh1 Qd3 0-1

[Event "Leiden LCT op 3rd"]
[Site "Leiden"]
[Date "2009.07.11"]
[Round "2"]
[White "Van Halderen, Herman"]
[Black "Naroditsky, Daniel"]
[Result "1-0"]
[ECO "E94"]
[WhiteElo "2133"]
[BlackElo "2356"]
[PlyCount "79"]
[EventDate "2009.07.10"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 131 Extra"]
[Source "ChessBase"]
[SourceDate "2009.09.03"]
[SourceVersion "2"]
[SourceVersionDate "2009.09.16"]
[SourceQuality "1"]

1. c4 g6 2. Nc3 Bg7 3. d4 Nf6 4. e4 d6 5. Be2 0-0 6. Nf3 Na6 7. 0-0 e5 8. Be3 Ng4 9. Bg5 Qe8 10. h3 Nf6 11. dxe5 dxe5 12. Nd5 Nxe4 13. Be7 c6 14. Bxf8 Qxf8 15. Ne3 Be6 16. Qc2 f5 17. a3 Qf6 18. b4 Ng5 19. Nxg5 Qxg5 20. Rad1 f4 21. Bg4 Bf7 22. Rd7 h5 23. h4 Qxh4 24. Bh3 Qg5 25. Nd1 f3 26. Ne3 fxg2 27. Nxg2 Qf6 28. Rfd1 e4 29. Qxe4 Re8 30. Qd3 Bf8 31. Rxb7 Nb8 32. Qg3 Na6 33. Rxa7 Bxc4 34. Qf4 Qxf4 35. Nxf4 c5 36. b5 Nb8 37. a4 Bh6 38. Nd5 Bg5 39. Rb7 Bb3 40. Nc7 1-0

[Event "Leiden LCT op 2nd"]
[Site "Leiden"]
[Date "2008.07.14"]
[Round "4"]
[White "Groetz, Harald"]
[Black "Van Halderen, Herman"]
[Result "1-0"]
[ECO "B87"]
[WhiteElo "2405"]
[BlackElo "2109"]
[PlyCount "137"]
[EventDate "2008.07.11"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 125 Extra"]
[Source "ChessBase"]
[SourceDate "2008.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2008.09.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4 e6 7. 0-0 b5 8. Bb3 Be7 9. f4 Nbd7 10. Be3 Nc5 11. Nc6 Qc7 12. Nxe7 Qxe7 13. e5 dxe5 14. fxe5 Nfd7 15. Qh5 Nxb3 16. Ne4 0-0 17. cxb3 f5 18. exf6 gxf6 19. Rad1 Bb7 20. Rxd7 Qxd7 21. Nxf6+ Rxf6 22. Rxf6 Qg7 23. Bg5 Rf8 24. Rxf8+ Qxf8 25. Bh6 Qe7 26. Qe5 Bd5 27. h3 Kf7 28. Qg7+ Ke8 29. Qg8+ Kd7 30. Bf8 Qh4 31. Qg7+ Ke8 32. Bd6 h6 33. Be5 Qg5 34. Qxg5 hxg5 35. Bf6 g4 36. hxg4 Kf7 37. Be5 a5 38. a4 bxa4 39. bxa4 Bb3 40. Bc3 Bxa4 41. Bxa5 Bb3 42. Kf2 Kg6 43. Bd8 Bd1 44. Kg3 e5 45. b4 Be2 46. Kh4 Bf1 47. Kh3 Bb5 48. Kg3 Be2 49. g5 Kf5 50. Kf2 Bb5 51. Ke3 Be8 52. Bf6 Bc6 53. g3 Be8 54. Kd3 Bb5+ 55. Kc3 Be2 56. Bd8 Kg6 57. Kd2 Bb5 58. Ke3 Bc6 59. Kd3 Kf5 60. Kc4 e4 61. Bf6 Bb7 62. b5 Kg6 63. Kd4 Ba8 64. Ke3 Kf5 65. g4+ Kg6 66. Kf4 Bb7 67. Bd4 Bc8 68. b6 Bb7 69. Be3 1-0

[Event "Leiden LCT op 1st"]
[Site "Leiden"]
[Date "2007.07.13"]
[Round "1"]
[White "Van den Doel, Erik"]
[Black "Van Halderen, Herman"]
[Result "1-0"]
[ECO "B50"]
[WhiteElo "2587"]
[PlyCount "73"]
[EventDate "2007.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 119 Extra"]
[Source "ChessBase"]
[SourceDate "2007.09.04"]
[SourceVersion "1"]
[SourceVersionDate "2007.09.04"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. c3 Nf6 4. Be2 Nc6 5. d4 g6 6. 0-0 Bg7 7. d5 Ne5 8. Nxe5 dxe5 9. Be3 0-0 10. Nd2 b6 11. a4 Bd7 12. Bb5 Ne8 13. Qe2 Nd6 14. Kh1 Qc7 15. Bxd7 Qxd7 16. f3 Rfc8 17. f4 e6 18. fxe5 Bxe5 19. Nf3 f6 20. Nxe5 fxe5 21. Qg4 Re8 22. Rf6 Nf5 23. exf5 exf5 24. Qc4 Kg7 25. Rc6 Rad8 26. a5 f4 27. Bg1 e4 28. axb6 axb6 29. Re6 Rxe6 30. dxe6 Qd3 31. Ra7+ Kf6 32. Rf7+ Ke5 33. e7 Re8 34. Qa4 b5 35. Qa6 Qd6 36. Qxb5 Rxe7 37. Bxc5 1-0

[Event "NED-chT 9697"]
[Site "Netherlands"]
[Date "1996.??.??"]
[Round "?"]
[White "Van Halderen, Herman"]
[Black "Berkhout, Sander"]
[Result "1/2-1/2"]
[ECO "A08"]
[PlyCount "83"]
[EventDate "1996.??.??"]
[EventType "team"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. Nf3 c5 2. g3 Nc6 3. Bg2 e5 4. d3 d5 5. 0-0 f6 6. c4 Be6 7. b3 Nge7 8. Nc3 d4 9. Ne4 Nc8 10. Ba3 Qa5 11. Bb2 Be7 12. e3 0-0 13. exd4 cxd4 14. a3 Qc7 15. b4 Nd6 16. Nxd6 Bxd6 17. Re1 Bf7 18. Rc1 a6 19. Nd2 Be7 20. Nb3 Nd8 21. Na5 Rb8 22. c5 Ne6 23. Nc4 Qd8 24. a4 Nc7 25. Nb6 Nd5 26. Nxd5 Bxd5 27. Bxd5+ Qxd5 28. Rc4 Rfe8 29. Qe2 Rbc8 30. Rec1 f5 31. f3 Bg5 32. Rd1 Be3+ 33. Kg2 a5 34. Bc1 axb4 35. Bxe3 dxe3 36. Qxe3 e4 37. fxe4 fxe4 38. Rxe4 b3 39. Qd4 Qxd4 40. Rxd4 Rxc5 41. Rb4 Rc2+ 42. Kf3 1/2-1/2

[Event "NED-chT 9697"]
[Site "Netherlands"]
[Date "1996.??.??"]
[Round "?"]
[White "Van Halderen, Herman"]
[Black "Wieringa, Helmer"]
[Result "0-1"]
[ECO "A12"]
[PlyCount "56"]
[EventDate "1996.??.??"]
[EventType "team"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. Nf3 d5 2. c4 c6 3. e3 Nf6 4. b3 h6 5. Bb2 Bf5 6. Be2 e6 7. 0-0 Bd6 8. d4 0-0 9. Nc3 a6 10. Rc1 b5 11. Bd3 Bxd3 12. Qxd3 Nbd7 13. e4 Bf4 14. e5 Bxc1 15. Bxc1 Nh7 16. Ne2 bxc4 17. bxc4 Qa5 18. cxd5 cxd5 19. Nf4 Rfc8 20. Nh4 Qc3 21. Qd1 Qxc1 22. Qxc1 Rxc1 23. Rxc1 g5 24. Rc7 Ndf8 25. Nf5 exf5 26. Nxd5 Ne6 27. Rd7 Nxd4 28. h3 Nc6 0-1

[Event "NED-chT 9495"]
[Site "Netherlands"]
[Date "1994.??.??"]
[Round "4"]
[White "Deleyn, Gunter"]
[Black "Van Halderen, Herman"]
[Result "1/2-1/2"]
[ECO "B58"]
[WhiteElo "2320"]
[PlyCount "91"]
[EventDate "1994.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Ndb5 a6 8. Na3 Be7 9. Bg5 Nxe4 10. Nxe4 Bxg5 11. Nxd6+ Ke7 12. Nxc8+ Rxc8 13. 0-0 Qxd1 14. Rfxd1 Nd4 15. Bd3 b5 16. c3 Ne6 17. Nc2 g6 18. a4 Rc5 19. axb5 axb5 20. Ra7+ Kf6 21. Bf1 Rd8 22. Rxd8 Nxd8 23. Nb4 e4 24. Rd7 Ne6 25. Nd5+ Kg7 26. Ne3 h5 27. Rb7 Nc7 28. g3 Kf8 29. h4 Bxe3 30. fxe3 Ke8 31. Kf2 Kd7 32. Bg2 Re5 33. Rb6 Ne8 34. Rb7+ Nc7 35. Ke2 Kc6 36. Rb8 Ne8 37. Rd8 Nd6 38. b3 Rd5 39. Ra8 Kb7 40. Rd8 Kc7 41. Ra8 Kb7 42. Ra1 Rc5 43. Kd2 Rf5 44. Ke2 Rc5 45. Kd2 Rd5+ 46. Ke2 1/2-1/2

[Event "NED-chT 9495"]
[Site "Netherlands"]
[Date "1994.??.??"]
[Round "7"]
[White "Leenders, Ruud"]
[Black "Van Halderen, Herman"]
[Result "0-1"]
[ECO "E16"]
[PlyCount "76"]
[EventDate "1994.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 b6 3. g3 Bb7 4. Bg2 e6 5. c4 c5 6. d5 exd5 7. Nh4 Qc8 8. cxd5 d6 9. 0-0 Be7 10. e4 0-0 11. Nf5 Re8 12. Nc3 a6 13. Bf4 Qd8 14. a4 Bf8 15. Re1 Ra7 16. h4 Bc8 17. Ne3 Nbd7 18. Nc4 Ne5 19. Bxe5 dxe5 20. Qd2 Bd6 21. Nd1 Bb8 22. Nde3 g6 23. b4 Nd7 24. Reb1 Rb7 25. b5 a5 26. Qe2 Nf6 27. Rd1 Rf8 28. Qf1 Ne8 29. Bh3 f5 30. Qg2 Bd6 31. Ra2 Kh8 32. Re2 f4 33. Nxd6 Nxd6 34. gxf4 exf4 35. Ng4 f3 36. Qg3 Bxg4 37. Bxg4 fxe2 38. Bxe2 Nxe4 0-1

[Event "NED-chT 9495"]
[Site "Netherlands"]
[Date "1994.??.??"]
[Round "6"]
[White "Strijbos, Maarten"]
[Black "Van Halderen, Herman"]
[Result "1-0"]
[ECO "B25"]
[PlyCount "83"]
[EventDate "1994.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 Nf6 6. f4 d6 7. Nf3 0-0 8. Be3 Rb8 9. h3 Nd7 10. 0-0 b5 11. Qd2 Nd4 12. Ne1 e6 13. Nd1 b4 14. c3 bxc3 15. bxc3 Nb5 16. f5 exf5 17. exf5 Nb6 18. g4 Bb7 19. Bg5 Bf6 20. Bxf6 Qxf6 21. fxg6 Qxg6 22. Rf5 Kh8 23. Nf3 Rg8 24. Qf2 Nd7 25. a4 Nc7 26. Ne3 f6 27. Nc4 Ne8 28. Re1 Ne5 29. Ncxe5 fxe5 30. Rb1 Ng7 31. Nh4 Qe6 32. Rf6 Qc8 33. Ng6+ hxg6 34. Qd2 Kh7 35. Qg5 Ne6 36. Qh4+ Kg7 37. g5 Rh8 38. Qg4 Bxg2 39. Rxb8 Qxb8 40. Qxe6 Qb1+ 41. Kxg2 Qc2+ 42. Rf2 1-0

[Event "NED-chT 9495"]
[Site "Netherlands"]
[Date "1994.??.??"]
[Round "2"]
[White "Van Halderen, Herman"]
[Black "Dommisse, Cornelis"]
[Result "1-0"]
[ECO "D34"]
[PlyCount "43"]
[EventDate "1994.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. 0-0 0-0 6. d4 c5 7. cxd5 exd5 8. Nc3 Nc6 9. Bf4 Re8 10. Rc1 Be6 11. Nb5 Nh5 12. Be3 c4 13. Ne5 Qb6 14. Nc3 Nf6 15. Nxc4 dxc4 16. d5 Qxb2 17. dxe6 fxe6 18. Qa4 Bb4 19. Rc2 Qa3 20. Qxa3 Bxa3 21. Nb5 Bf8 22. Bxc6 1-0

[Event "NED-chT 9495"]
[Site "Netherlands"]
[Date "1994.??.??"]
[Round "9"]
[White "Van Halderen, Herman"]
[Black "Kuiper, Robert Jan"]
[Result "1-0"]
[ECO "A30"]
[PlyCount "91"]
[EventDate "1994.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 e6 3. g3 b6 4. Bg2 Bb7 5. 0-0 c5 6. Nc3 Nc6 7. e4 d6 8. d4 cxd4 9. Nxd4 Qd7 10. Re1 Be7 11. Be3 0-0 12. Qe2 Rac8 13. Rad1 Nxd4 14. Bxd4 Qc6 15. b3 Rfe8 16. Nb5 Ra8 17. Bb2 a6 18. Nd4 Qc7 19. a4 Rac8 20. Qd3 Nd7 21. Re3 Nc5 22. Qe2 Rcd8 23. Qg4 Bf8 24. Ne2 Bc6 25. Nf4 g6 26. Bf6 Be7 27. Bb2 Bf8 28. h4 Nd7 29. h5 Bg7 30. Bxg7 Kxg7 31. Qh4 h6 32. hxg6 fxg6 33. Qg4 Nf8 34. Nh5+ Kh8 35. Nf6 Re7 36. Qh4 g5 37. Qg4 Rf7 38. Rf3 Qe7 39. Nh5 Rxf3 40. Qxf3 Be8 41. e5 Nh7 42. exd6 Rxd6 43. Rxd6 Qxd6 44. Nf6 Bg6 45. Ng4 h5 46. Qc3+ 1-0

[Event "NED-chT 9495"]
[Site "Netherlands"]
[Date "1994.??.??"]
[Round "1"]
[White "Van Halderen, Herman"]
[Black "Overeem, Marc"]
[Result "0-1"]
[ECO "A07"]
[PlyCount "132"]
[EventDate "1994.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. Nf3 d5 2. g3 Nf6 3. Bg2 c6 4. d3 Bg4 5. Ne5 Bh5 6. c4 e6 7. Nd2 Nbd7 8. Ndf3 Bb4+ 9. Bd2 Bxd2+ 10. Qxd2 0-0 11. 0-0 Nxe5 12. Nxe5 Qd6 13. d4 Nd7 14. g4 Bg6 15. Nxg6 fxg6 16. Rac1 Rf7 17. f4 dxc4 18. Rxc4 Raf8 19. e3 e5 20. Qb4 Qe6 21. dxe5 Nb6 22. Rd4 Qxg4 23. Qd2 Qe6 24. b3 Rd7 25. Rxd7 Qxd7 26. Qxd7 Nxd7 27. Rd1 Nb6 28. e6 Re8 29. Rd6 Kf8 30. Bh3 Ke7 31. Rd2 Rd8 32. Rxd8 Kxd8 33. e4 Ke7 34. Kf2 Na8 35. Kg3 Nc7 36. f5 gxf5 37. exf5 Nd5 38. Bf1 Kd6 39. Bd3 a5 40. Kf3 Ke5 41. h4 Ne7 42. h5 h6 43. Be4 Ng8 44. Ke3 Nf6 45. Bd3 Nxh5 46. a4 Nf6 47. Kf3 Nd5 48. Kg4 Kf6 49. Kf3 Ke5 50. Kg4 Nf6+ 51. Kf3 Ne8 52. Kg4 Nc7 53. Be2 Kf6 54. Bd3 b5 55. Kf4 g6 56. axb5 cxb5 57. fxg6 Nxe6+ 58. Ke3 a4 59. b4 a3 60. Bb1 h5 61. Kd2 h4 62. Kc3 Ng5 63. Bd3 h3 64. Bf1 Ne4+ 65. Kc2 h2 66. Bg2 Nd2 0-1

[Event "NED-chT 9495"]
[Site "Netherlands"]
[Date "1994.??.??"]
[Round "5"]
[White "Van Halderen, Herman"]
[Black "Van Rij, Gert"]
[Result "0-1"]
[ECO "A11"]
[PlyCount "40"]
[EventDate "1994.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. Nf3 d5 2. c4 c6 3. e3 Nf6 4. Be2 Nbd7 5. b3 e5 6. Bb2 Bd6 7. 0-0 0-0 8. Nc3 Re8 9. Rc1 a6 10. Qc2 Nf8 11. cxd5 cxd5 12. e4 d4 13. Nd5 Nxd5 14. exd5 Ng6 15. Bd3 Bg4 16. Be4 f5 17. Bxf5 Bxf3 18. gxf3 e4 19. fxe4 Qg5+ 20. Kh1 Qf4 0-1

[Event "NED-chT 9495"]
[Site "Netherlands"]
[Date "1994.??.??"]
[Round "8"]
[White "Verholt, Gerard"]
[Black "Van Halderen, Herman"]
[Result "1-0"]
[ECO "E18"]
[PlyCount "113"]
[EventDate "1994.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. 0-0 0-0 7. Nc3 d5 8. Ne5 Nbd7 9. Bg5 h6 10. Bf4 c5 11. dxc5 Nxc5 12. cxd5 exd5 13. Nf3 Ne6 14. Be5 Bc5 15. e3 Re8 16. Qa4 Nd7 17. Bd4 Nxd4 18. Nxd4 Nf6 19. Rad1 Qc8 20. Nde2 Rd8 21. b4 Bf8 22. Rd4 g5 23. Rfd1 Qe6 24. Qb3 Rac8 25. e4 Qe8 26. exd5 Bd6 27. R4d3 Qf8 28. a3 Ba6 29. b5 Bb7 30. Ne4 Nxe4 31. Bxe4 Re8 32. Bf3 Re5 33. Nd4 Rce8 34. Nc2 Qg7 35. Ne3 Bc8 36. Qc3 g4 37. Bg2 Qg6 38. Nc4 Re2 39. Nxd6 Qxd6 40. Bf1 R2e4 41. Rd4 R4e5 42. Rc4 Bd7 43. Rcd4 h5 44. a4 Rf5 45. Qd2 Ree5 46. Bg2 Rf6 47. Be4 h4 48. Qb4 hxg3 49. hxg3 Qb8 50. d6 Rh5 51. Bg2 Rg6 52. Qc4 Kg7 53. Rf4 Qe8 54. Qc3+ Kg8 55. Re4 Be6 56. d7 Qd8 57. Rxe6 1-0

[Event "Den Haag-C "]
[Site "The Hague"]
[Date "1968.??.??"]
[Round "?"]
[White "Van Halderen, Herman"]
[Black "Bohm, Hans"]
[Result "1/2-1/2"]
[ECO "B04"]
[PlyCount "144"]
[EventDate "1968.??.??"]
[EventType "tourn"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 g6 5. Be2 Bg7 6. 0-0 0-0 7. c4 Nb6 8. Be3 Nc6 9. exd6 cxd6 10. Nc3 Bg4 11. b3 d5 12. cxd5 Nxd5 13. Nxd5 Qxd5 14. Rc1 Rad8 15. Rc5 Qd6 16. Qc1 Bxf3 17. Bxf3 Bxd4 18. Rd5 Bxe3 19. Qxe3 Qa3 20. Rb5 Rd7 21. Be4 Qxa2 22. h4 a6 23. Rb6 Qa5 24. Bxc6 bxc6 25. b4 Qh5 26. Qe4 Qd5 27. Re1 Rfd8 28. Rxa6 Qxe4 29. Rxe4 Rd1+ 30. Kh2 R1d4 31. Rxe7 Rxb4 32. Rxc6 Rxh4+ 33. Kg3 Rh5 34. Rf6 Rf8 35. Ra7 Rg5+ 36. Kh3 Kg7 37. Rf3 Rb5 38. Rc7 Rb6 39. Rd3 Rf6 40. f3 Ra8 41. Rdd7 h5 42. Rc5 Ra1 43. Kh2 Ra2 44. Kh3 Rf4 45. Kg3 Raa4 46. Rb7 Kh6 47. Rb6 Rfd4 48. Rb7 h4+ 49. Kh3 Rd1 50. g3 hxg3 51. Kxg3 f5 52. Rc2 f4+ 53. Kh3 Rd5 54. Rcc7 Kg5 55. Rd7 Rda5 56. Rd2 Kh6 57. Rdd7 Kg5 58. Rd2 Ra3 59. Rf2 Rc5 60. Rd7 Ra4 61. Rfd2 Rc1 62. R7d5+ Kh6 63. Rd1 Rxd1 64. Rxd1 Kh5 65. Rd5+ g5 66. Rd2 Ra1 67. Kg2 Ra3 68. Rb2 Kh4 69. Rc2 Rd3 70. Ra2 Kh5 71. Rc2 Rd5 72. Kh1 Rd3 1/2-1/2

[Event "Den Haag-C "]
[Site "The Hague"]
[Date "1968.??.??"]
[Round "?"]
[White "Van Halderen, Herman"]
[Black "Van Dop, Arend J"]
[Result "0-1"]
[ECO "B35"]
[PlyCount "80"]
[EventDate "1968.??.??"]
[EventType "tourn"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Bc4 0-0 8. Bb3 d6 9. h3 Qa5 10. 0-0 Bd7 11. f4 Nxd4 12. Bxd4 Bc6 13. Qd3 Nd7 14. Nd5 Bxd5 15. Bxd5 Nc5 16. Qe3 Bxd4 17. Qxd4 Ne6 18. Qd3 Rac8 19. c3 Qb6+ 20. Kh1 Qxb2 21. Rac1 Nxf4 22. Qf3 Nxd5 23. exd5 Qxa2 24. Ra1 Qd2 25. Rxa7 Rxc3 26. Qe4 Rc1 27. Rxc1 Qxc1+ 28. Kh2 Qc7 29. Qb4 Rb8 30. Qb3 e6 31. dxe6 d5+ 32. Kh1 fxe6 33. Ra1 Rc8 34. Qe3 e5 35. Qf3 Qf7 36. Qe2 Qf4 37. Qb2 Qd4 38. Qa2 e4 39. Rb1 e3 40. Qe2 Qe4 0-1

