[Event "Haarlem Nova College op-B 12th"]
[Site "Haarlem"]
[Date "2013.06.30"]
[Round "5"]
[White "Koeman, Feddo"]
[Black "Van Diepen, Peter"]
[Result "1-0"]
[ECO "B40"]
[PlyCount "157"]
[EventDate "2013.06.28"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. Nc3 Nc6 4. d3 d5 5. Bf4 a6 6. Qe2 Be7 7. Qd2 Nf6 8. Be2 b5 9. exd5 exd5 10. 0-0 d4 11. Ne4 Nxe4 12. dxe4 0-0 13. Rad1 Be6 14. b3 f6 15. c3 dxc3 16. Qxc3 Qb6 17. Bd6 Rfd8 18. Bxe7 Nxe7 19. Qe3 a5 20. Rc1 Rac8 21. Nd2 Rd4 22. Rc2 f5 23. f3 Qd6 24. Bxb5 f4 25. Qe2 Nc6 26. Bxc6 Rxc6 27. Rfc1 Qe5 28. Qb5 Bd7 29. Qxa5 Qd6 30. Re1 Qg6 31. Nc4 Qh5 32. Nd2 Rh6 33. Nf1 Rg6 34. Qxc5 Qxc5 35. Rxc5 Rd3 36. Kf2 Kf7 37. Rd5 Rd6 38. Rxd6 Rxd6 39. Rc1 Ke6 40. g3 g5 41. Rc2 Bb5 42. Rd2 Rc6 43. a4 Ba6 44. b4 Rc1 45. b5 Bb7 46. Ra2 Rb1 47. Nd2 Rb4 48. g4 Kd6 49. Ke2 Bc8 50. Kd3 Be6 51. Ra3 Kc5 52. Rc3+ Kd6 53. Ra3 Kc5 54. Kc3 Bf7 55. Nb3+ Bxb3 56. Rxb3 Rxa4 57. b6 Rc4+ 58. Kd2 Rd4+ 59. Rd3 Rb4 60. Rd5+ Kxb6 61. e5 Rb2+ 62. Kd3 Rxh2 63. e6 Rh1 64. Rd4 Re1 65. Re4 Rd1+ 66. Ke2 Rd8 67. Re5 Re8 68. Kd3 Kc6 69. Ke4 h6 70. Kf5 Kd6 71. Re4 Ke7 72. Rd4 Rf8+ 73. Ke5 Ra8 74. Rd7+ Ke8 75. Rh7 Ra3 76. Kf6 Kd8 77. e7+ Kd7 78. Rh8 Re3 79. Rd8+ 1-0

[Event "Haarlem Nova College op-B 12th"]
[Site "Haarlem"]
[Date "2013.06.29"]
[Round "3"]
[White "Koeman, Cas"]
[Black "Van Diepen, Peter"]
[Result "1-0"]
[ECO "B22"]
[PlyCount "71"]
[EventDate "2013.06.28"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. c3 d5 4. exd5 exd5 5. d4 Nc6 6. Bb5 Nf6 7. 0-0 Be7 8. Ne5 Qb6 9. Bxc6+ bxc6 10. Qc2 c4 11. Bg5 0-0 12. Nd2 h6 13. Bh4 Be6 14. f4 c5 15. f5 Bc8 16. Ndf3 cxd4 17. cxd4 Re8 18. Kh1 Ne4 19. Bxe7 Rxe7 20. Nd2 Nxd2 21. Qxd2 f6 22. Ng6 Re4 23. Rae1 Bb7 24. Rxe4 dxe4 25. Qe2 Qb4 26. Rc1 Bd5 27. Nf4 Bf7 28. d5 Rc8 29. h3 Qc5 30. Qxe4 Re8 31. Ne6 Qf2 32. Rc2 Qf1+ 33. Kh2 g6 34. fxg6 Bxe6 35. dxe6 f5 36. Qb7 1-0

[Event "Haarlem Nova College op-B 12th"]
[Site "Haarlem"]
[Date "2013.06.29"]
[Round "2"]
[White "Van Diepen, Peter"]
[Black "De Kleuver, Jonathan"]
[Result "0-1"]
[ECO "D70"]
[BlackElo "1879"]
[PlyCount "134"]
[EventDate "2013.06.28"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. d4 d5 2. c4 Nf6 3. cxd5 Nxd5 4. Nf3 g6 5. e4 Nb6 6. Be2 Bg7 7. 0-0 0-0 8. Be3 Nc6 9. h3 e5 10. d5 Ne7 11. Ne1 f5 12. f3 Kh8 13. Nc3 c6 14. d6 Ng8 15. Bc5 Be6 16. b3 Nd7 17. Bf2 Ngf6 18. Nd3 Nh5 19. Nc5 Nxc5 20. Bxc5 Nf4 21. Bc4 Qg5 22. Qc2 Nxh3+ 23. Kh2 Nf4 24. Bxe6 Nxe6 25. Ba3 Qh4+ 26. Kg1 Bh6 27. Qf2 Qxf2+ 28. Kxf2 Bd2 29. Bb2 Nd4 30. exf5 gxf5 31. Ne2 c5 32. Rad1 Bh6 33. Rh1 Bg7 34. Rh5 Rad8 35. Rdh1 h6 36. Ng3 Rxd6 37. Bc1 Kh7 38. Bd2 e4 39. Bf4 Ra6 40. a4 Rg6 41. R5h3 Nxb3 42. Rd1 Bd4+ 43. Ke2 exf3+ 44. Kxf3 Re6 45. Rh5 Bg7 46. Rd7 Nd4+ 47. Kf2 Rb6 48. Be5 Ne6 49. Kg1 Kg6 50. Bxg7 Nxg7 51. Rh4 f4 52. Rg4+ Kf6 53. Ne4+ Kf5 54. Rgxg7 Kxe4 55. Rge7+ Kf5 56. Rxb7 Rxb7 57. Rxb7 Ke4 58. Rxa7 Kd3 59. Rh7 Rf6 60. Rd7+ Kc3 61. a5 Ra6 62. Rd5 Kc4 63. Rf5 Rxa5 64. Rxf4+ Kb3 65. Rh4 Ra6 66. Kf2 c4 67. Ke2 Rd6 0-1

[Event "Haarlem Nova College op-B 12th"]
[Site "Haarlem"]
[Date "2013.06.29"]
[Round "4"]
[White "Van Diepen, Peter"]
[Black "Levasier, Pieter"]
[Result "1-0"]
[ECO "A52"]
[PlyCount "51"]
[EventDate "2013.06.28"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. Nf3 Bc5 5. e3 Nc6 6. a3 Ngxe5 7. b4 Nxf3+ 8. Qxf3 Bd6 9. Bb2 0-0 10. Bd3 Ne5 11. Bxe5 Bxe5 12. Qe4 f6 13. Qxh7+ Kf7 14. Qg6+ Ke7 15. Ra2 Rg8 16. f4 d6 17. fxe5 dxe5 18. Rd2 Be6 19. Bf5 Qc8 20. e4 b6 21. 0-0 Qb7 22. Bxe6 Kxe6 23. Rfd1 Qc8 24. Nc3 Qf8 25. Qf5+ Kf7 26. Rd7+ 1-0

[Event "Haarlem Nova College op-B 12th"]
[Site "Haarlem"]
[Date "2013.06.28"]
[Round "1"]
[White "Tuijp, Paul"]
[Black "Van Diepen, Peter"]
[Result "1-0"]
[ECO "B42"]
[PlyCount "89"]
[EventDate "2013.06.28"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Nc6 6. Nxc6 bxc6 7. Be3 d5 8. 0-0 Ne7 9. Bc5 Ng6 10. Bxf8 Nxf8 11. Re1 Ng6 12. Nd2 0-0 13. Nf3 Bb7 14. c4 d4 15. c5 e5 16. a3 a5 17. Qd2 Bc8 18. Rad1 Bg4 19. Be2 Be6 20. Qc1 Qb8 21. Nd2 Nf4 22. Bc4 Bg4 23. f3 Bd7 24. g3 Ne6 25. Bf1 Nc7 26. Nc4 Be6 27. Nxe5 Bb3 28. Nd7 Qe8 29. Rxd4 Ne6 30. Rd3 Ba4 31. Nxf8 Qxf8 32. Rd6 h6 33. Qc3 Nd8 34. b3 Nb7 35. Rd4 Bb5 36. Bxb5 cxb5 37. c6 Rc8 38. Rd7 Qc5+ 39. Qxc5 Nxc5 40. Rd6 Nxb3 41. Red1 Kh7 42. R1d3 Nc1 43. Rd2 Nb3 44. Rc2 a4 45. c7 1-0

[Event "Alkmaar ACCOM op"]
[Site "Alkmaar"]
[Date "1989.??.??"]
[Round "1"]
[White "Temming, Jan"]
[Black "Van Diepen, Peter"]
[Result "1-0"]
[ECO "C10"]
[PlyCount "33"]
[EventDate "1989.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nf6 5. Bd3 Bd7 6. Nf3 Bc6 7. Qe2 Be7 8. c4 Nbd7 9. Neg5 Nb6 10. 0-0 h6 11. Nxf7 Kxf7 12. Ne5+ Kf8 13. Ng6+ Kf7 14. Re1 Bd7 15. d5 e5 16. Nxe5+ Kf8 17. Ng6+ 1-0

[Event "Alkmaar ACCOM op"]
[Site "Alkmaar"]
[Date "1989.??.??"]
[Round "5"]
[White "Tesselaar, Willem"]
[Black "Van Diepen, Peter"]
[Result "1-0"]
[ECO "C04"]
[PlyCount "67"]
[EventDate "1989.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 Nc6 4. c3 Nf6 5. e5 Nd7 6. Bd3 b6 7. Ne2 Bb7 8. 0-0 f6 9. exf6 Nxf6 10. Nf4 Qd6 11. Nf3 Be7 12. Re1 Nd8 13. Ng5 Bc8 14. Qe2 Ng4 15. Qxg4 h5 16. Nxh5 e5 17. Nxg7+ Kf8 18. Nf5 Bxf5 19. Qxf5+ Kg7 20. Qxe5+ Qxe5 21. dxe5 Rh5 22. Nf3 Ne6 23. Nd4 Nc5 24. Nf5+ Kf7 25. Bc2 Rah8 26. h3 Bf8 27. Re3 Ke6 28. Nd4+ Ke7 29. Bd1 Rg5 30. Bg4 Rhg8 31. b4 Nd7 32. Nc6+ Ke8 33. Rg3 R5g6 34. Bh5 1-0

[Event "Alkmaar ACCOM op"]
[Site "Alkmaar"]
[Date "1989.??.??"]
[Round "7"]
[White "Van Diepen, Peter"]
[Black "Brugman, Nico"]
[Result "1-0"]
[ECO "D35"]
[PlyCount "139"]
[EventDate "1989.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Be7 5. e3 Nbd7 6. cxd5 exd5 7. Bd3 h6 8. Bh4 Nb6 9. Nge2 Be6 10. Qc2 Rc8 11. Bg3 0-0 12. Nf4 c5 13. Nxe6 fxe6 14. dxc5 Bxc5 15. 0-0 Nbd7 16. Qb3 Bb6 17. Na4 Nc5 18. Nxc5 Rxc5 19. Rfc1 Nh5 20. Be5 Qg5 21. Rxc5 Bxc5 22. Bd4 Bxd4 23. exd4 Nf4 24. Bf1 Qf5 25. Qe3 Rc8 26. g3 Ng6 27. Bd3 Qf6 28. Re1 Nf8 29. f4 Re8 30. Qf2 Nd7 31. Be2 Qg6 32. Bb5 Qf7 33. Qc2 a6 34. Bd3 Nf8 35. Rc1 Qf6 36. Qc5 Nd7 37. Qb4 g5 38. Rc7 Nf8 39. fxg5 Qxg5 40. Qe1 Qf6 41. Qf2 Qg5 42. h4 Qg4 43. Be2 Qg6 44. Qf4 e5 45. dxe5 Ne6 46. h5 Qb1+ 47. Qc1 Qxc1+ 48. Rxc1 Nd4 49. Bg4 Rxe5 50. Rc7 Rg5 51. Rc8+ Kg7 52. Rc7+ Kf6 53. Bc8 Rxg3+ 54. Kh2 Rg5 55. Bxb7 Rxh5+ 56. Kg2 Rg5+ 57. Kh3 Rg7 58. Rxg7 Kxg7 59. Bxa6 Nc2 60. a4 Kf6 61. Bd3 Nb4 62. Be2 h5 63. a5 Nc6 64. a6 Ke5 65. b4 Na7 66. b5 Kd6 67. b6 Nc8 68. b7 Kc7 69. bxc8Q+ Kxc8 70. Kh4 1-0

[Event "Alkmaar ACCOM op"]
[Site "Alkmaar"]
[Date "1989.??.??"]
[Round "2"]
[White "Van Diepen, Peter"]
[Black "Zweers, T."]
[Result "0-1"]
[ECO "D06"]
[PlyCount "98"]
[EventDate "1989.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 d5 2. c4 Nf6 3. cxd5 Nxd5 4. Nf3 Bf5 5. Nbd2 Nf6 6. e3 e6 7. Qb3 b6 8. Bb5+ c6 9. Be2 Nbd7 10. Nh4 Bg4 11. Nhf3 Be7 12. 0-0 0-0 13. Re1 c5 14. Ba6 Rb8 15. a4 Nd5 16. Ne5 Nxe5 17. dxe5 Qc7 18. f4 Rfd8 19. Ne4 Nb4 20. Bc4 Nc6 21. Nf2 Na5 22. Qc3 Nxc4 23. Qxc4 Bh5 24. e4 Rd4 25. Qc3 f6 26. exf6 Bxf6 27. e5 Be7 28. Qh3 Bg6 29. Qxe6+ Bf7 30. Qh3 Qc6 31. b3 Rb4 32. Rb1 Rd8 33. Ba3 Rxf4 34. Qg3 Rfd4 35. Bb2 Bh4 36. Qe3 Rd2 37. g3 Qg6 38. Ne4 R2d3 39. Qf4 Be7 40. Ba1 Bxb3 41. Nf2 Rf8 42. Qe4 Qxe4 43. Rxe4 Rdf3 44. Nh3 Bc2 45. Rg4 Bxb1 46. Nf4 Bf5 47. Rxg7+ Kxg7 48. Nh5+ Kh6 49. Nf4 Rd8 0-1

[Event "Alkmaar ACCOM op"]
[Site "Alkmaar"]
[Date "1989.??.??"]
[Round "3"]
[White "Van den Berg, Gerard"]
[Black "Van Diepen, Peter"]
[Result "1-0"]
[ECO "D00"]
[PlyCount "59"]
[EventDate "1989.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 Nf6 2. Nc3 d5 3. e4 dxe4 4. f3 exf3 5. Nxf3 e6 6. a3 b6 7. Bd3 Ba6 8. 0-0 Bxd3 9. Qxd3 Be7 10. Bf4 Nd5 11. Nxd5 Qxd5 12. Bxc7 Nc6 13. Rae1 0-0 14. c4 Qd7 15. Bg3 Rfd8 16. b4 Nxd4 17. Ne5 Qa4 18. Nxf7 Rd7 19. Ne5 Rdd8 20. Nf7 Rd7 21. Qe4 Rc8 22. Be5 Nc2 23. Qg4 Bf8 24. Nh6+ Kh8 25. Qxe6 Bc5+ 26. bxc5 Nxe1 27. c6 Qxa3 28. Kh1 Qa2 29. Bxg7+ Kxg7 30. Qf6# 1-0

[Event "Alkmaar ACCOM op"]
[Site "Alkmaar"]
[Date "1989.??.??"]
[Round "4"]
[White "Van der Zee, Cees"]
[Black "Van Diepen, Peter"]
[Result "1-0"]
[ECO "C02"]
[PlyCount "51"]
[EventDate "1989.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. Nf3 Qb6 5. Be2 Bd7 6. 0-0 Bb5 7. Nc3 Bxe2 8. Nxe2 cxd4 9. Nexd4 Ne7 10. Be3 Qa5 11. c3 Nec6 12. b4 Qd8 13. Qa4 Nd7 14. Nxc6 bxc6 15. Qxc6 Rc8 16. Qb5 Qc7 17. Qa6 Ra8 18. Rac1 Be7 19. c4 dxc4 20. Rxc4 Nb8 21. Qa4+ Qd7 22. Rc8+ Bd8 23. Qc2 0-0 24. Rd1 Qb5 25. Rdxd8 Nd7 26. Rxa8 1-0

[Event "Haarlem ACCOM op2"]
[Site "Haarlem"]
[Date "1986.??.??"]
[Round "4"]
[White "Ariese, Ruud"]
[Black "Van Diepen, Peter"]
[Result "1-0"]
[ECO "A16"]
[PlyCount "31"]
[EventDate "1986.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 0-0 5. d3 c6 6. Bd2 h6 7. Nf3 d6 8. 0-0 e5 9. h3 Be6 10. e4 a5 11. d4 Bxc4 12. dxe5 Bxf1 13. exf6 Bxg2 14. fxg7 Bxf3 15. gxf8Q+ Qxf8 16. Qxf3 1-0

[Event "Haarlem ACCOM op2"]
[Site "Haarlem"]
[Date "1986.??.??"]
[Round "2"]
[White "Brugman, Nico"]
[Black "Van Diepen, Peter"]
[Result "0-1"]
[ECO "E90"]
[PlyCount "100"]
[EventDate "1986.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. d5 d6 4. Nc3 g6 5. e4 Bg7 6. Bd3 0-0 7. Nf3 e6 8. 0-0 Re8 9. Bg5 h6 10. Bh4 g5 11. Bg3 Nh5 12. Rc1 Nxg3 13. fxg3 Bd4+ 14. Kh1 e5 15. Ne1 g4 16. Nc2 a6 17. Qe1 Qg5 18. Nxd4 cxd4 19. Qf2 f5 20. Ne2 Rf8 21. exf5 Nd7 22. b4 b6 23. h4 gxh3 24. gxh3 h5 25. Ng1 Nf6 26. Nf3 Qh6 27. Nh4 Bb7 28. Be2 Kf7 29. Kh2 Rg8 30. Rg1 Rg7 31. c5 bxc5 32. bxc5 Ne4 33. Qf3 Nxc5 34. Qxh5+ Qxh5 35. Bxh5+ Kf6 36. Bf3 e4 37. Rxc5 dxc5 38. Bxe4 Re8 39. Bf3 Rd7 40. g4 Kg5 41. Ng2 Bxd5 42. h4+ Kf6 43. Bxd5 Rxd5 44. Nf4 Rde5 45. Nh5+ Kf7 46. Ng3 d3 47. g5 d2 48. g6+ Kf8 49. Rd1 Rd8 50. Nf1 Rxf5 0-1

[Event "Haarlem ACCOM op2"]
[Site "Haarlem"]
[Date "1986.??.??"]
[Round "7"]
[White "Van Diepen, Peter"]
[Black "Boer, R."]
[Result "0-1"]
[ECO "D13"]
[PlyCount "99"]
[EventDate "1986.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 Nf6 5. cxd5 cxd5 6. e3 Bd7 7. Qb3 Qc8 8. Bd3 Bc6 9. Bd2 a6 10. Rc1 Nbd7 11. 0-0 Bd6 12. Na4 Qd8 13. Nc3 0-0 14. Ne2 Re8 15. Bb4 Qe7 16. Bxd6 Qxd6 17. Ng3 g6 18. Rfd1 Kg7 19. Rc3 h5 20. Ng5 h4 21. Nf1 Ne4 22. Nxe4 dxe4 23. Be2 Bd5 24. Qa4 f5 25. Rdc1 Re7 26. a3 Bc6 27. Qd1 e5 28. dxe5 Qxd1 29. Rxd1 Nxe5 30. Rc5 Nd7 31. Rc3 Ne5 32. Rd4 g5 33. Nd2 Rd7 34. Rc5 Kf6 35. Nb3 Rxd4 36. Nxd4 Rd8 37. h3 Be8 38. Kh2 f4 39. b4 fxe3 40. fxe3 Rd5 41. Rc1 Kg6 42. Rf1 Bd7 43. Rf8 Kg7 44. Rb8 Nc6 45. Rxb7 Nxd4 46. exd4 Rxd4 47. Bxa6 e3 48. Bb5 Kf6 49. Rxd7 Rxd7 50. Bxd7 0-1

[Event "Haarlem ACCOM op2"]
[Site "Haarlem"]
[Date "1986.??.??"]
[Round "3"]
[White "Van Diepen, Peter"]
[Black "Hartog, J."]
[Result "0-1"]
[ECO "D06"]
[PlyCount "110"]
[EventDate "1986.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. d4 d5 2. c4 Nf6 3. cxd5 Nxd5 4. Nf3 e6 5. e4 Nb6 6. Nc3 N8d7 7. Bd3 Nf6 8. 0-0 c6 9. Bg5 Be7 10. Qc2 g6 11. Bh6 Nh5 12. e5 Nd5 13. Qd2 Rg8 14. Ne4 f5 15. exf6 Ndxf6 16. Neg5 Bd6 17. Rfe1 Bf4 18. Qc2 Qd6 19. Bc4 Nd5 20. Re2 Ke7 21. Rae1 Bxg5 22. Bxg5+ Kf7 23. Ne5+ Kg7 24. g3 Rf8 25. a3 Rf5 26. Qd2 Kg8 27. Bd3 Rf8 28. Bh6 Ng7 29. Qg5 Qe7 30. Qd2 Qe8 31. Re4 Ne7 32. Bxg7 Kxg7 33. Rh4 Rh8 34. Bc4 Nf5 35. Rhe4 b5 36. Bd3 Nd6 37. Rh4 Nf5 38. Bxf5 exf5 39. Qh6+ Kg8 40. Nd3 Qf7 41. Qg5 Be6 42. Nc5 Re8 43. Rf4 h6 44. Rxf5 hxg5 45. Rxf7 Bxf7 46. Rxe8+ Bxe8 47. Ne6 Rh5 48. g4 Rh4 49. f3 Bd7 50. Nxg5 Bxg4 51. fxg4 Rxg4+ 52. Kf2 Rxg5 53. Kf3 Kf7 54. h4 Rg1 55. Kf2 Rb1 0-1

[Event "Haarlem ACCOM op2"]
[Site "Haarlem"]
[Date "1986.??.??"]
[Round "5"]
[White "Van Diepen, Peter"]
[Black "Van der Wakker, Peter"]
[Result "1-0"]
[ECO "D36"]
[PlyCount "79"]
[EventDate "1986.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 Nbd7 6. Nf3 c6 7. cxd5 exd5 8. Bd3 h6 9. Bf4 Nh5 10. Be5 Nhf6 11. Bf4 0-0 12. Qc2 Ne8 13. g4 Bd6 14. Bg3 Ndf6 15. g5 hxg5 16. Nxg5 Nc7 17. 0-0-0 Ne6 18. Nf3 b5 19. Bxd6 Qxd6 20. Ne5 Nd7 21. Nxd7 Bxd7 22. f4 a5 23. f5 Ng5 24. Qg2 f6 25. h4 Nh7 26. h5 Rf7 27. Rdg1 Qe7 28. Qf2 a4 29. h6 b4 30. Ne2 Rc8 31. hxg7 Rxg7 32. Rxg7+ Kxg7 33. Qh4 Kh8 34. Kd2 Rg8 35. Nf4 Be8 36. Ng6+ Bxg6 37. fxg6 Rg7 38. Qxh7+ Rxh7 39. Rxh7+ Qxh7 40. gxh7 1-0

[Event "Haarlem ACCOM op2"]
[Site "Haarlem"]
[Date "1986.??.??"]
[Round "6"]
[White "Zwanenbeek, Iwan"]
[Black "Van Diepen, Peter"]
[Result "1-0"]
[ECO "E75"]
[PlyCount "67"]
[EventDate "1986.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 g6 3. d4 c5 4. Nc3 Bg7 5. d5 d6 6. e4 0-0 7. Be2 e6 8. Bg5 h6 9. Bd2 Na6 10. Qc1 Kh7 11. 0-0 Nc7 12. Qc2 a6 13. a4 b6 14. Rad1 e5 15. h3 Nh5 16. Ne1 Nf4 17. Bxf4 exf4 18. Nd3 Qg5 19. e5 Bxh3 20. Bf3 Bxg2 21. Ne4 Qf5 22. Nxd6 Qh3 23. Bxg2 Qg4 24. f3 Qg3 25. Qf2 Qg5 26. Ne4 Qd8 27. Rfe1 g5 28. Bh3 Kg6 29. Qg2 Qe8 30. Nxf4+ Kh7 31. Nf6+ Bxf6 32. exf6 Qxa4 33. Bf5+ Kh8 34. Qh3 1-0

[Event "Alkmaar ACCOM op-A"]
[Site "Alkmaar"]
[Date "1985.??.??"]
[Round "7"]
[White "Altena, KJ."]
[Black "Van Diepen, Peter"]
[Result "1-0"]
[ECO "C13"]
[PlyCount "31"]
[EventDate "1985.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nf6 5. Bg5 Be7 6. Bxf6 gxf6 7. Nf3 Bd7 8. Bd3 Bc6 9. Qd2 Rg8 10. 0-0-0 h5 11. Ng3 Nd7 12. Kb1 Nb6 13. a3 Qd6 14. Ne5 Bxg2 15. Rhg1 Bc6 16. Nxh5 1-0

[Event "Alkmaar ACCOM op-A"]
[Site "Alkmaar"]
[Date "1985.??.??"]
[Round "2"]
[White "De Waal, Jacobus"]
[Black "Van Diepen, Peter"]
[Result "1/2-1/2"]
[ECO "E70"]
[PlyCount "51"]
[EventDate "1985.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. d5 d6 4. Nc3 g6 5. e4 Bg7 6. Bd3 0-0 7. Nge2 Re8 8. f4 e6 9. 0-0 exd5 10. cxd5 a6 11. a4 b6 12. Ng3 Bb7 13. Qc2 Nbd7 14. Bd2 Ng4 15. Rae1 Bd4+ 16. Kh1 Qh4 17. h3 Nf2+ 18. Kh2 Nf6 19. Be2 Bc8 20. f5 N6xe4 21. Ncxe4 Nxe4 22. Nxe4 Bxf5 23. Bd3 Be5+ 24. Kh1 Bxh3 25. Kg1 Bg4 26. Bf4 1/2-1/2

[Event "Alkmaar ACCOM op-A"]
[Site "Alkmaar"]
[Date "1985.??.??"]
[Round "5"]
[White "Grondsma, Henk"]
[Black "Van Diepen, Peter"]
[Result "0-1"]
[ECO "C02"]
[PlyCount "148"]
[EventDate "1985.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Qb6 5. Nf3 Bd7 6. Be2 Bb5 7. 0-0 Bxe2 8. Qxe2 Nd7 9. Be3 c4 10. Qc2 Ne7 11. Nh4 Nc6 12. f4 g6 13. Nd2 Bh6 14. Rf3 0-0-0 15. b3 cxb3 16. Nxb3 Na5 17. Nxa5 Qxa5 18. c4 dxc4 19. Qxc4+ Kb8 20. Rb1 Nb6 21. Qb3 Rc8 22. d5 Qxd5 23. Bxb6 axb6 24. Qxb6 Qc5+ 25. Qxc5 Rxc5 26. g3 Rhc8 27. Rb2 Rc1+ 28. Kg2 Bf8 29. Rfb3 R8c7 30. Nf3 h6 31. Nd4 Bc5 32. Nb5 Rd7 33. Kh3 Rcd1 34. Nc3 R1d4 35. Nb5 Rd2 36. Kg4 b6 37. Nd6 Rd4 38. Rc2 Ka8 39. Nb5 Rd1 40. h4 h5+ 41. Kg5 Be7+ 42. Kh6 Bf8+ 43. Kg5 Be7+ 44. Kh6 Rd8 45. Kg7 R1d7 46. Kxf7 Bxh4+ 47. Kxg6 Rg8+ 48. Kh6 Rh8+ 49. Kg6 Rg8+ 50. Kh6 Bxg3 51. Nc7+ Kb7 52. Nxe6 Re7 53. Nd8+ Ka6 54. Ra3+ Kb5 55. Rb2+ Kc4 56. Rc2+ Kd5 57. Rd3+ Ke4 58. Rxg3 Rxg3 59. Rc6 Re8 60. Nf7 Rf8 61. Rg6 Rxg6+ 62. Kxg6 h4 63. e6 Kd5 64. f5 h3 65. e7 Re8 66. f6 h2 67. Ng5 h1Q 68. f7 Qb1+ 69. Kh5 Rh8+ 70. Kg4 Qg1+ 71. Kf5 Qf2+ 72. Kg6 Qc2+ 73. Kf6 Rh6+ 74. Kg7 Qg6+ 0-1

[Event "Alkmaar ACCOM op-A"]
[Site "Alkmaar"]
[Date "1985.??.??"]
[Round "4"]
[White "Nibbering, S."]
[Black "Van Diepen, Peter"]
[Result "0-1"]
[ECO "C13"]
[PlyCount "80"]
[EventDate "1985.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nf6 5. Bg5 Be7 6. Bd3 Bd7 7. Nf3 Bc6 8. Qe2 Nxe4 9. Bxe7 Qxe7 10. Bxe4 Bxe4 11. Qxe4 Qb4+ 12. Nd2 Nd7 13. Rb1 Nf6 14. Qd3 Rd8 15. c3 Qd6 16. Qb5+ c6 17. Qxb7 0-0 18. Qb3 e5 19. Nc4 Qd5 20. f3 exd4 21. 0-0 Rb8 22. Qa4 c5 23. Rfe1 Rfe8 24. Rbd1 h5 25. Ne3 Qg5 26. Nc4 h4 27. Nd6 Red8 28. Qxa7 Rxb2 29. Qxf7+ Kh7 30. g4 hxg3 31. h3 Rxd6 32. Re7 Nd5 33. Re8 Nxc3 34. Qg8+ Kg6 35. Rde1 Rdb6 36. R1e5 Rb1+ 37. Re1 Rxe1+ 38. Rxe1 Qf5 39. Re7 Qb1+ 40. Kg2 Qxa2+ 0-1

[Event "Alkmaar ACCOM op-A"]
[Site "Alkmaar"]
[Date "1985.??.??"]
[Round "3"]
[White "Van Diepen, Peter"]
[Black "Van Beusekom, Leo"]
[Result "0-1"]
[ECO "D35"]
[PlyCount "62"]
[EventDate "1985.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Be7 5. e3 0-0 6. cxd5 exd5 7. Bd3 Be6 8. Nge2 c6 9. Qc2 Nbd7 10. h3 h6 11. Bh4 Re8 12. f4 Nf8 13. g4 Rc8 14. f5 Bd7 15. Bg3 c5 16. Nf4 cxd4 17. exd4 Bc5+ 18. Be2 Bxd4 19. Qd3 Bxc3+ 20. bxc3 Qa5 21. 0-0 Rxc3 22. Be1 Rxd3 23. Bxa5 Rde3 24. Bd1 Ne4 25. Nxd5 Rxh3 26. f6 gxf6 27. Nxf6+ Nxf6 28. Rxf6 Kg7 29. Rf4 Bc6 30. Rc1 Ng6 31. Bc3+ Rxc3 0-1

[Event "Alkmaar ACCOM op-A"]
[Site "Alkmaar"]
[Date "1985.??.??"]
[Round "1"]
[White "Van Diepen, Peter"]
[Black "Van Egmond, Joost"]
[Result "0-1"]
[ECO "E49"]
[PlyCount "47"]
[EventDate "1985.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 Nc6 6. Nge2 d5 7. a3 Bxc3+ 8. bxc3 0-0 9. 0-0 Qe7 10. f3 Rd8 11. Bb2 dxc4 12. Bxc4 e5 13. d5 e4 14. f4 Be6 15. Ng3 Bxd5 16. Bb5 Bc4 17. Qxd8+ Rxd8 18. Bxc4 Na5 19. Be2 c4 20. Rfd1 Rd3 21. Nf5 Qc5 22. Nd4 Rxe3 23. Nb3 Qb6 24. Nd4 0-1

[Event "Alkmaar op-A"]
[Site "Alkmaar"]
[Date "1984.??.??"]
[Round "?"]
[White "Brugman, Nico"]
[Black "Van Diepen, Peter"]
[Result "1/2-1/2"]
[ECO "A43"]
[PlyCount "58"]
[EventDate "1984.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 e6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 Qc7 5. e3 a6 6. Be2 Nc6 7. 0-0 Nf6 8. Nd2 Bc5 9. N2f3 e5 10. Nf5 0-0 11. b3 e4 12. Nd2 Qe5 13. Nd4 Nxd4 14. exd4 Bxd4 15. Rb1 d5 16. b4 Bf5 17. Rb3 e3 18. Nf3 exf2+ 19. Kh1 Qe4 20. Nxd4 dxc4 21. Re3 Qd5 22. Nxf5 Qxf5 23. Rg3 h5 24. Bxc4 Qh7 25. Qf3 Qc2 26. Qc3 Qxc3 27. Rxc3 Rac8 28. Bf4 b5 29. Bxf7+ Kxf7 1/2-1/2

[Event "Alkmaar op-A"]
[Site "Alkmaar"]
[Date "1984.??.??"]
[Round "?"]
[White "Van Diepen, Peter"]
[Black "Tromp, Andreas"]
[Result "0-1"]
[ECO "D06"]
[PlyCount "68"]
[EventDate "1984.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 d5 2. c4 Nf6 3. cxd5 Nxd5 4. Nf3 e6 5. e4 Nf6 6. Bg5 Be7 7. Nc3 c6 8. Bd3 Nbd7 9. 0-0 0-0 10. Qc2 Ne8 11. Bxe7 Qxe7 12. e5 g6 13. Rae1 Nb6 14. Ne4 Nd5 15. Qd2 f5 16. exf6 Nexf6 17. Nc5 b6 18. Nxe6 Bxe6 19. Ng5 Nc7 20. Nxe6 Nxe6 21. f4 Qd7 22. Bc4 Nd5 23. Re2 Rf6 24. Rfe1 Raf8 25. g3 Kh8 26. Re5 Ndc7 27. R1e4 Ng7 28. Re7 Qc8 29. Qe2 Qd8 30. R7e5 Nf5 31. g4 Nd6 32. g5 Rxf4 33. Rxf4 Rxf4 34. Re7 Nxc4 0-1

[Event "Alkmaar op-A"]
[Site "Alkmaar"]
[Date "1984.??.??"]
[Round "?"]
[White "Van Diepen, Peter"]
[Black "Van der Berg, Eddy"]
[Result "0-1"]
[ECO "E80"]
[PlyCount "70"]
[EventDate "1984.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 Nbd7 6. Be3 e5 7. d5 Ng8 8. g4 Ne7 9. Qd2 f5 10. exf5 gxf5 11. gxf5 Nf6 12. Nge2 Nxf5 13. Bg5 h6 14. Be3 Nh4 15. 0-0-0 Nxf3 16. Qd3 Nh4 17. Ng3 Qe7 18. Be2 Bh3 19. Nh5 Bf5 20. Nxf6+ Bxf6 21. Bh5+ Kd7 22. Qe2 Rag8 23. c5 Bg5 24. c6+ Kc8 25. cxb7+ Kxb7 26. Qb5+ Kc8 27. Qa6+ Kd8 28. Qxa7 Bxe3+ 29. Qxe3 Qg5 30. Qxg5+ Rxg5 31. Be2 Rhg8 32. a4 Rg2 33. a5 Nf3 34. a6 Nd4 35. a7 Nb3# 0-1

[Event "Alkmaar op-A"]
[Site "Alkmaar"]
[Date "1984.??.??"]
[Round "?"]
[White "Verhagen, Ad"]
[Black "Van Diepen, Peter"]
[Result "1/2-1/2"]
[ECO "C13"]
[PlyCount "35"]
[EventDate "1984.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nf6 5. Bg5 Be7 6. Nxf6+ gxf6 7. Be3 Bd7 8. Be2 Bc6 9. Bf3 Rg8 10. g3 f5 11. c3 Bd5 12. Nh3 Qd7 13. Nf4 Be4 14. Nd3 Qd5 15. Qa4+ Qc6 16. Qxc6+ Bxc6 17. Bxc6+ Nxc6 18. Bf4 1/2-1/2

[Event "Alkmaar op-A"]
[Site "Alkmaar"]
[Date "1984.??.??"]
[Round "?"]
[White "Zwanenbeek, Iwan"]
[Black "Van Diepen, Peter"]
[Result "1/2-1/2"]
[ECO "B08"]
[PlyCount "59"]
[EventDate "1984.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. Nf3 Nf6 2. d4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. 0-0 c6 7. Bf4 Nh5 8. Bg5 h6 9. Be3 Nd7 10. Qd2 Kh7 11. Rad1 Nb6 12. Nh4 Nf6 13. f4 Ng4 14. Bxg4 Bxg4 15. Nf3 Nc4 16. Qe2 Nxe3 17. Qxe3 Qa5 18. Rd3 Rae8 19. a3 Be6 20. Ne2 Bc4 21. Rc3 Qb5 22. a4 Qa6 23. Re1 c5 24. e5 Bxe2 25. Rxe2 cxd4 26. Nxd4 dxe5 27. fxe5 e6 28. b3 Qa5 29. Rd3 Rc8 30. Nb5 1/2-1/2

[Event "Alkmaar op-B"]
[Site "Alkmaar"]
[Date "1983.??.??"]
[Round "?"]
[White "Duinmaijer, Martin"]
[Black "Van Diepen, Peter"]
[Result "1-0"]
[ECO "C18"]
[PlyCount "98"]
[EventDate "1983.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Qa5 7. Bd2 Qa4 8. Qg4 g6 9. c4 dxc4 10. dxc5 Nc6 11. Qxc4 Qxc4 12. Bxc4 Nxe5 13. Bc3 f6 14. Bxe5 fxe5 15. Nf3 e4 16. Ng5 Nf6 17. 0-0-0 h6 18. Nxe6 Bxe6 19. Bxe6 Ke7 20. Bd5 Nxd5 21. Rxd5 Ke6 22. Rhd1 Rac8 23. Rd6+ Ke7 24. Rd7+ Ke6 25. R1d6+ Kf5 26. Rd5+ Ke6 27. R7d6+ Kf7 28. Re5 Rhe8 29. Rxe8 Rxe8 30. Kd2 Re5 31. Rd7+ Kf6 32. Rxb7 Rd5+ 33. Ke3 Rxc5 34. Rxa7 Rxc2 35. Ra8 Ra2 36. Kxe4 Re2+ 37. Kf3 Ra2 38. h4 Ke6 39. g4 Kf6 40. a4 Ke5 41. Kg3 Ra3+ 42. f3 Kf6 43. a5 Ra1 44. a6 g5 45. h5 Ra2 46. Rg8 Kf7 47. Rg6 Ra1 48. Rxh6 Rg1+ 49. Kf2 Ra1 1-0

[Event "Alkmaar op-B"]
[Site "Alkmaar"]
[Date "1983.??.??"]
[Round "?"]
[White "Kleyn, H."]
[Black "Van Diepen, Peter"]
[Result "1-0"]
[ECO "C02"]
[PlyCount "91"]
[EventDate "1983.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Qb6 5. Nf3 Bd7 6. Bd3 Bb5 7. 0-0 Bxd3 8. Qxd3 c4 9. Qe2 h6 10. Nbd2 Nc6 11. b3 cxb3 12. axb3 Nge7 13. b4 Qc7 14. Nb1 b6 15. Bd2 Qb7 16. Na3 Nc8 17. Nc2 b5 18. Nfe1 a6 19. f4 N6e7 20. Ne3 g6 21. Ng4 Ng8 22. Nd3 h5 23. Nf6+ Nxf6 24. exf6 Nb6 25. f5 gxf5 26. Rxf5 Nc4 27. Rf2 Bd6 28. Bf4 Bf8 29. Qe1 Nb6 30. Re2 Qc8 31. Rea2 Rg8 32. Re2 Rg6 33. Be5 Nd7 34. Nf4 Nxe5 35. Rxe5 Rg4 36. Nxd5 Qc6 37. Ne3 0-0-0 38. Nxg4 hxg4 39. Re4 Bd6 40. Rxg4 Rh8 41. h3 Qc7 42. Rxa6 Bh2+ 43. Kh1 Qb7 44. Kxh2 Qxa6 45. Rg5 Qc6 46. Rc5 1-0

[Event "Alkmaar op-B"]
[Site "Alkmaar"]
[Date "1983.??.??"]
[Round "?"]
[White "Pover, Piet"]
[Black "Van Diepen, Peter"]
[Result "1-0"]
[ECO "E65"]
[PlyCount "53"]
[EventDate "1983.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. c4 c5 2. g3 Nf6 3. Bg2 g6 4. Nc3 Bg7 5. Nf3 Nc6 6. 0-0 0-0 7. d4 d6 8. dxc5 dxc5 9. Be3 Qa5 10. Qa4 Ng4 11. Qxa5 Nxa5 12. Bxc5 Nxc4 13. Nd5 Rd8 14. Nxe7+ Kh8 15. Ng5 Be6 16. Bxb7 Rab8 17. Nxe6 fxe6 18. Nc6 Rdc8 19. Bxc8 Rxc8 20. Rad1 Bf6 21. Rc1 Rxc6 22. Rxc4 Ne5 23. Rc2 Nd7 24. b4 a5 25. a3 axb4 26. axb4 Bd4 27. Bxd4+ 1-0

[Event "Alkmaar op-B"]
[Site "Alkmaar"]
[Date "1983.??.??"]
[Round "?"]
[White "Van Diepen, Peter"]
[Black "Meijer, Willem"]
[Result "1/2-1/2"]
[ECO "A06"]
[PlyCount "33"]
[EventDate "1983.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. Nf3 e6 2. b3 d5 3. Bb2 Nf6 4. e3 Be7 5. Bb5+ Bd7 6. Be2 c5 7. Ne5 Nc6 8. 0-0 0-0 9. d3 Nxe5 10. Bxe5 Bc6 11. Bb2 Nd7 12. d4 Bf6 13. c3 Re8 14. f4 g6 15. Nd2 Rc8 16. Nf3 Bg7 17. Qe1 1/2-1/2

[Event "Bela Crkva op"]
[Site "Bela Crkva"]
[Date "1983.??.??"]
[Round "5"]
[White "Van Diepen, Peter"]
[Black "Petursson, Margeir"]
[Result "0-1"]
[ECO "B52"]
[BlackElo "2455"]
[PlyCount "112"]
[EventDate "1983.06.??"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "YUG"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. c4 Nf6 6. Nc3 Nc6 7. d4 cxd4 8. Nxd4 e6 9. 0-0 Be7 10. f4 0-0 11. Be3 Rac8 12. b3 a6 13. Rc1 Rfd8 14. Qe2 d5 15. Nxc6 Rxc6 16. Rfd1 Qc7 17. exd5 exd5 18. Nxd5 Nxd5 19. cxd5 Rxc1 20. Bxc1 Bd6 21. g3 Rc8 22. Be3 Re8 23. Rd3 Qa5 24. Qf2 h6 25. Kg2 Qb4 26. Bd2 Qa3 27. Bc3 Qc1 28. Qd2 Qb1 29. Bd4 Re1 30. Bf2 Rc1 31. Qe2 Rc8 32. Rd2 Bb4 33. d6 Bxd2 34. d7 Rf8 35. Bc5 Qc2 36. Bxf8 Qc6+ 37. Kf2 Qxd7 38. Bc5 Bc3 39. Be3 g6 40. Qf3 h5 41. f5 Qxf5 42. Qxf5 gxf5 43. Kf3 Kg7 44. Kf4 Kf6 45. h4 Be5+ 46. Kf3 Ke6 47. Bf4 f6 48. Ke3 Kd5 49. Kd3 Kc5 50. a4 Kb4 51. Kc2 Ka3 52. Bc1+ Kb4 53. Bf4 b5 54. axb5 axb5 55. Bd2+ Kc5 56. Be3+ Kd5 0-1

[Event "Alkmaar op-B"]
[Site "Alkmaar"]
[Date "1983.??.??"]
[Round "?"]
[White "Van Diepen, Peter"]
[Black "Van der Sluijs, Lothar"]
[Result "1-0"]
[ECO "A43"]
[PlyCount "101"]
[EventDate "1983.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 g6 2. c4 Bg7 3. e4 c5 4. d5 d6 5. Bd3 Nf6 6. Nf3 0-0 7. 0-0 e5 8. a4 Nbd7 9. Nc3 Ne8 10. Nb5 a6 11. Nc3 f5 12. Bg5 Bf6 13. Qd2 f4 14. Bh6 Rf7 15. a5 Bg7 16. Bxg7 Rxg7 17. g3 g5 18. Kh1 Nf8 19. Na4 Bh3 20. Rfc1 Nf6 21. Ng1 Bd7 22. Nb6 Rb8 23. b4 Qe8 24. bxc5 dxc5 25. f3 fxg3 26. Nxd7 Qxd7 27. hxg3 g4 28. f4 Nh5 29. Qh2 Qe8 30. f5 Nd7 31. Qf2 Nhf6 32. Kg2 Qe7 33. Ne2 Kf7 34. Rh1 Kg8 35. Rh6 Nf8 36. Rb1 N8d7 37. Nc3 Qd8 38. Qa2 Kf7 39. Rbh1 Qc7 40. Nd1 Rh8 41. Nf2 Rb8 42. Be2 b6 43. Qd2 bxa5 44. Bxg4 Rb4 45. Bh5+ Ke7 46. Be2 Qb6 47. g4 Rb2 48. Qe3 Rb3 49. Nd3 a4 50. g5 Qa5 51. Kf3 1-0

[Event "Alkmaar op-B"]
[Site "Alkmaar"]
[Date "1983.??.??"]
[Round "?"]
[White "Van Diepen, Peter"]
[Black "Zwanenbeek, Iwan"]
[Result "1-0"]
[ECO "A42"]
[PlyCount "99"]
[EventDate "1983.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 g6 2. c4 Bg7 3. Nc3 c6 4. e4 d6 5. Bg5 Nd7 6. Nf3 h6 7. Bh4 c5 8. d5 Ngf6 9. Bd3 g5 10. Bg3 Nh5 11. Qc2 a6 12. 0-0 Nxg3 13. hxg3 g4 14. Nh4 Ne5 15. f4 gxf3 16. gxf3 Bh3 17. Ng2 Rg8 18. Kh2 Qd7 19. Be2 h5 20. Rg1 Bxg2 21. Rxg2 0-0-0 22. Na4 Qc7 23. a3 Bf6 24. Rh1 b5 25. cxb5 axb5 26. Nc3 Qd7 27. Qd1 Nc4 28. Bxc4 bxc4 29. f4 e5 30. f5 Bg5 31. Qe2 h4 32. gxh4 Bf4+ 33. Kg1 f6 34. Kf1 Qb7 35. Rg6 Rd7 36. Rhg1 Rdg7 37. Rxg7 Rxg7 38. Rxg7 Qxg7 39. Qxc4 Bh2 40. Qa6+ Kb8 41. Qxd6+ Kb7 42. Qc6+ Kb8 43. Qb6+ Ka8 44. Qxc5 Qh6 45. Qc8+ Ka7 46. Nb5+ Kb6 47. Qc6+ Ka5 48. b4+ Ka4 49. Nd4+ Kxa3 50. Qc3+ 1-0

[Event "Alkmaar op-B"]
[Site "Alkmaar"]
[Date "1983.??.??"]
[Round "?"]
[White "Van Zutphen, P."]
[Black "Van Diepen, Peter"]
[Result "1-0"]
[ECO "A56"]
[PlyCount "55"]
[EventDate "1983.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. d5 d6 4. Nc3 g6 5. a4 b6 6. e4 Bg7 7. Bd3 Na6 8. Nge2 0-0 9. 0-0 e6 10. Rb1 exd5 11. Nxd5 Nxd5 12. exd5 Bg4 13. f3 Bc8 14. Be3 Nb4 15. Nc3 Bxc3 16. bxc3 Nxd3 17. Qxd3 Bf5 18. Qd2 Bxb1 19. Rxb1 Qd7 20. Bg5 Qf5 21. Rf1 Rfe8 22. g4 Qd7 23. Bf6 Re6 24. dxe6 fxe6 25. Rd1 Rf8 26. g5 Qxa4 27. Qxd6 Qxc4 28. Qe7 1-0

[Event "Alkmaar op-A"]
[Site "Alkmaar"]
[Date "1982.??.??"]
[Round "?"]
[White "Broek, Thomas"]
[Black "Van Diepen, Peter"]
[Result "1-0"]
[ECO "C15"]
[PlyCount "27"]
[EventDate "1982.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Bd2 dxe4 5. Qg4 Qxd4 6. 0-0-0 h5 7. Qg3 Bd6 8. Bf4 Bxf4+ 9. Qxf4 Qc5 10. Nxe4 Qe7 11. Bb5+ Kf8 12. Nf3 a6 13. Ne5 Rh6 14. Rd8+ 1-0

[Event "Alkmaar op-A"]
[Site "Alkmaar"]
[Date "1982.??.??"]
[Round "?"]
[White "Van Diepen, Peter"]
[Black "Boots, Arie"]
[Result "1-0"]
[ECO "E20"]
[PlyCount "92"]
[EventDate "1982.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 g6 4. e4 d6 5. Bg5 c6 6. Be2 Bg7 7. Nf3 0-0 8. 0-0 Qc7 9. Qd2 a6 10. a4 Nbd7 11. Rfd1 Ne8 12. Be7 d5 13. cxd5 cxd5 14. exd5 Ndf6 15. Bxf8 Bxf8 16. dxe6 Bxe6 17. Ne5 Bb4 18. Qe3 Rd8 19. Rac1 Qb6 20. Bf3 Bb3 21. Rd3 Nd6 22. Nd5 Nf5 23. Nxf6+ Qxf6 24. Ng4 Qd6 25. Nh6+ Nxh6 26. Qxh6 Bxa4 27. Bxb7 Qb6 28. Qh4 Re8 29. Be4 Bb5 30. Rh3 h5 31. Bd3 Be7 32. Qf4 Bxd3 33. Rxd3 Qxb2 34. Rcd1 Qb5 35. Qc1 Bg5 36. f4 Bf6 37. d5 Qb7 38. d6 Re2 39. Rd5 Qb6+ 40. Rc5 Qb4 41. Rc2 Bd4+ 42. Kh1 Rxc2 43. Qxc2 Qxd6 44. Qe4 Qf6 45. Qxd4 Qe6 46. Qe5 Qb6 1-0

[Event "Alkmaar op-A"]
[Site "Alkmaar"]
[Date "1982.??.??"]
[Round "?"]
[White "Van Diepen, Peter"]
[Black "Zaal, R."]
[Result "1-0"]
[ECO "D17"]
[PlyCount "67"]
[EventDate "1982.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 e6 7. Bg5 Qc7 8. Nxc4 Nbd7 9. e3 Bb4 10. Bd3 Ne4 11. Qc2 Nxg5 12. h4 Bxd3 13. Qxd3 0-0-0 14. a5 Nc5 15. Qc2 Nge4 16. dxc5 Nxc5 17. 0-0 Rd3 18. Na4 Rhd8 19. Nxc5 Bxc5 20. Rfb1 Be7 21. g3 Bf6 22. Ra4 Qe7 23. b4 Bxh4 24. Nb6+ axb6 25. axb6 R8d5 26. b5 c5 27. Rxh4 Qd6 28. Kg2 Rxe3 29. Qxh7 Rxg3+ 30. fxg3 Rd2+ 31. Kh3 Qd5 32. Qg8+ Kd7 33. Qxf7+ Kd6 34. Qc7# 1-0

[Event "Alkmaar op-A"]
[Site "Alkmaar"]
[Date "1982.??.??"]
[Round "?"]
[White "Van der Veen, L."]
[Black "Van Diepen, Peter"]
[Result "1-0"]
[ECO "C02"]
[PlyCount "101"]
[EventDate "1982.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Qb6 5. Nf3 Bd7 6. Be2 Bb5 7. 0-0 Bxe2 8. Qxe2 Qa6 9. Re1 Qxe2 10. Rxe2 Nd7 11. Ne1 Ne7 12. Nc2 Nf5 13. Ne3 Ne7 14. Nc2 Rc8 15. Nba3 a6 16. Bd2 Nc6 17. Be1 Be7 18. b4 cxd4 19. cxd4 b5 20. Rd1 Bd8 21. Na1 Bb6 22. Nb3 Ke7 23. Nc5 Ra8 24. Rc2 Nxc5 25. bxc5 Bc7 26. Re2 b4 27. Nc2 Rhb8 28. Rd3 a5 29. f4 h5 30. Ne3 Rb7 31. Nd1 Rab8 32. Nb2 Ra8 33. Na4 Rab8 34. Rb2 Na7 35. Rdb3 Nb5 36. Bf2 Na3 37. Rg3 Nc4 38. Rbb3 Nd2 39. Rb2 Nc4 40. Rbb3 g6 41. Be1 Rg8 42. Rgd3 f6 43. Bh4 g5 44. exf6+ Kxf6 45. fxg5+ Kf5 46. c6 Rbb8 47. Nc5 Bf4 48. Rf3 Nd2 49. g3 Nxf3+ 50. Rxf3 Kg4 51. Rxf4+ 1-0

