| ECO C31 in 1993 play it! jonkman harmen defeats white's veltkamp gerben in 44 moves | 1. e4 e5 2. f4 d5 3. exd5 exf4 4. Nf3 c6 5. d4 Bd6 6. dxc6 Nxc6 7. Bb5 Ne7 8. O-O O-O 9. Nc3 Bg4 10. Ne2 Qc7 11. c4 Rad8 12. Bd2 Nf5 13. Bxc6 Qxc6 14. Qb3 Rfe8 15. Nxf4 Bxf3 16. Qxf3 Qxc4 17. Kh1 Qxd4 18. Rad1 b6 19. Nd5 Qh4 20. Bf4 Bxf4 21. Nxf4 Rxd1 22. Qxd1 Ng3+ |
| ECO C45 in 2003 play it! jonkman harmen defeats white's kosteniuk alexan in 66 moves | 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qf6 5. Nxc6 Bc5 6. Qd2 bxc6 7. Nc3 Qg6 8. f4 Ne7 9. Bd3 d5 10. Na4 Bd4 11. e5 Bf5 12. Bxf5 Nxf5 13. Qe2 h5 14. c3 Bb6 15. b3 d4 16. Qe4 dxc3 17. Nxb6 axb6 18. O-O O-O-O 19. Qc4 Nh4 20. g3 Nf5 21. Qxc3 h4 22. g4 Qxg4+ 23. Kf2 Nd4 24. Qd3 Kb7 25. Rg1 Qe6 26. Bb2 Nf5 27. Qe2 h3 28. Rac1 Rd5 29. Rc2 Rh4 30. Qe4 Nd6 31. Qe3 Qf5 32. Rgc1 Rxf4+ 33. Kg1 Qg4+ |
| ECO C67 in 2003 play it! jonkman harmen defeats white's ahmed esam aly in 88 moves | 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. Re1 Nd6 6. Nc3 Nxb5 7. Nxe5 Be7 8. Nxb5 Nxe5 9. Rxe5 O-O 10. Nc3 c6 11. Re1 d5 12. d4 Bd6 13. Ne2 Qh4 14. Ng3 f5 15. Nf1 f4 16. f3 Qf6 17. b3 Bb4 18. Re5 Bd6 19. Re1 b5 20. Bb2 a5 21. a3 Bf5 22. Qd2 g5 23. Rac1 a4 24. b4 Ra7 25. Qc3 Bb8 26. Re2 Rg7 27. Nd2 h5 28. Rce1 Bd7 29. Re5 g4 30. Rxh5 Qg6 31. Rh4 Qg5 32. Rxg4 Bxg4 33. fxg4 f3 34. gxf3 Bxh2+ 35. Kg2 Qh4 36. Qe3 Qg3+ 37. Kf1 Qxg4 38. Ke2 Qf5 39. Kd1 Bf4 40. Qe6+ Qxe6 41. Rxe6 Rg1+ 42. Re1 Rxe1+ 43. Kxe1 Bxd2+ 44. Kxd2 Rxf3 |
| ECO C44 in 2001 play it! jonkman harmen defeats white's kozakov mikhail in 68 moves | 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Nf6 5. e5 Ne4 6. Bd5 Nc5 7. Bxc6 dxc6 8. Qxd4 Bf5 9. Qc3 Ne6 10. Be3 Qd5 11. Nbd2 Be7 12. a3 O-O 13. O-O-O c5 14. Nb3 Qc6 15. Rd2 Rfd8 16. Rhd1 Rxd2 17. Rxd2 a5 18. Nxa5 Qa6 19. Nb3 Qf1+ 20. Rd1 Qxg2 21. Ne1 Qc6 22. Nd2 Rd8 23. Nf1 Rxd1+ 24. Kxd1 Bg4+ 25. Kc1 Qd5 26. b3 Nd4 27. Bxd4 cxd4 28. Qxc7 Bxa3+ 29. Kb1 Qh1 30. Qc4 Bh3 31. e6 fxe6 32. b4 Qxf1 33. Qc8+ Kf7 34. Qd7+ Kg6 |
| ECO C67 in 2004 play it! jonkman harmen defeats white's atakisi umut in 84 moves | 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6 6. Bxc6 dxc6 7. dxe5 Nf5 8. Qxd8+ Kxd8 9. Nc3 Bd7 10. Rd1 Kc8 11. Ng5 Be8 12. b3 a5 13. Bb2 b6 14. Rd3 Be7 15. Nge4 h5 16. Rad1 Kb7 17. Bc1 Bb4 18. h3 Bxc3 19. Nxc3 c5 20. Ne4 Nd4 21. c3 Ne6 22. f4 Bc6 23. Nf2 g6 24. g4 hxg4 25. hxg4 a4 26. b4 cxb4 27. cxb4 Bb5 28. Rg3 Rad8 29. Be3 Bc6 30. Rc1 a3 31. f5 gxf5 32. gxf5 Nd4 33. Bxd4 Rxd4 34. Rg7 Rxb4 35. e6 fxe6 36. fxe6 Rb2 37. Rg3 Rxa2 38. e7 Re2 39. Rxa3 Rg8+ 40. Kf1 Rxe7 41. Rca1 Bb5+ 42. Nd3 Rf8+ |
| ECO C25 in 1998 play it! jonkman harmen defeats white's konik michael in 46 moves | 1. e4 e5 2. Nc3 Nc6 3. g3 Bc5 4. Bg2 a6 5. Nge2 d6 6. Nd5 Nge7 7. Nec3 O-O 8. O-O Be6 9. b3 Qd7 10. Bb2 Bg4 11. Nxe7+ Nxe7 12. Qe1 f5 13. h3 Bh5 14. exf5 Nxf5 15. Ne4 Bb6 16. g4 Nh4 17. gxh5 Nf3+ 18. Bxf3 Rxf3 19. d4 Qxh3 20. Rd1 d5 21. Ng3 e4 22. Bc1 Raf8 23. Be3 c6 |
| ECO C67 in 2002 play it! jonkman harmen defeats white's nijboer friso in 108 moves | 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6 6. Bxc6 dxc6 7. dxe5 Nf5 8. Qxd8+ Kxd8 9. Nc3 Ne7 10. Ne4 Ng6 11. Re1 h6 12. Bd2 Bg4 13. Nd4 Nxe5 14. Bc3 Nc4 15. a4 c5 16. Ne2 b6 17. Nf6 Bd7 18. a5 Kc8 19. Nh5 Rg8 20. axb6 cxb6 21. Nef4 Bc6 22. Nd3 Nd6 23. Ne5 Kb7 24. Re3 Nf5 25. Rd3 f6 26. Nxc6 Kxc6 27. g4 Nd6 28. Re1 Nb5 29. Ng3 c4 30. Re6+ Kc7 31. Rd5 Nxc3 32. bxc3 Bc5 33. Ne4 Rgd8 34. Rxd8 Rxd8 35. Nxc5 bxc5 36. Kf1 Rd6 37. Re7+ Rd7 38. Re4 Kb6 39. Rxc4 Kb5 40. Re4 a5 41. Re1 Kc4 42. Ra1 Kxc3 43. Rxa5 c4 44. Rc5 Rd4 45. Rc7 Rxg4 46. h3 Re4 47. Rxg7 Kxc2 48. Rf7 Re6 49. Rc7 c3 50. Kg2 Kd2 51. Rd7+ Kc1 52. Rc7 c2 53. f4 Rb6 54. Kg3 Rb5 |
| ECO C22 in 2000 play it! jonkman harmen defeats white's degraeve jeanmar in 46 moves | 1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qe3 Nf6 5. Nc3 Bb4 6. Bd2 O-O 7. O-O-O Re8 8. Bc4 d6 9. f3 Ne5 10. Bb3 Be6 11. Bxe6 fxe6 12. Be1 Qe7 13. f4 Nc4 14. Qd3 d5 15. exd5 exd5 16. Nxd5 Nxd5 17. Qxd5+ Kh8 18. Qxc4 Qe3+ 19. Kb1 Rad8 20. Bd2 Qxd2 21. Ne2 Qxd1+ 22. Rxd1 Rxd1+ 23. Nc1 Rxc1+ |
| ECO C63 in 1999 play it! jonkman harmen defeats white's jensen jannick j in 34 moves | 1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 4. d3 fxe4 5. dxe4 Nf6 6. Bg5 Bb4+ 7. c3 Bc5 8. O-O d6 9. Nbd2 a6 10. Ba4 O-O 11. h3 Qe8 12. Kh1 Qh5 13. Qe1 Bxh3 14. gxh3 Qxh3+ 15. Kg1 Ng4 16. Qe2 Rxf3 17. Nxf3 Rf8 |
| ECO C67 in 2001 play it! jonkman harmen defeats white's galkin alexander in 88 moves | 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6 6. Bxc6 dxc6 7. dxe5 Nf5 8. Qxd8+ Kxd8 9. Nc3 h6 10. h3 Bd7 11. b3 Kc8 12. Bb2 b6 13. Rad1 Ne7 14. Rd2 c5 15. Rfd1 Be6 16. Ne2 g5 17. Rd8+ Kb7 18. Rxa8 Kxa8 19. h4 g4 20. Nh2 Nc6 21. Nf4 Rg8 22. Nxe6 fxe6 23. Rd7 Kb7 24. Rf7 Be7 25. g3 h5 26. Rh7 Rd8 27. Nf1 c4 28. Rxh5 Rd1 29. Kg2 Bb4 30. c3 Be7 31. b4 Rb1 32. Ba3 b5 33. Rh7 a5 34. h5 a4 35. Rg7 Ra1 36. Rg8 Nxe5 37. h6 Bf6 38. h7 Nd3 39. Nd2 Bxc3 40. Rxg4 Rxa2 41. Ne4 Ba1 42. Rg6 Nxf2 43. Nf6 Ne4+ 44. Bb2 a3 |
| ECO C55 in 2005 play it! jonkman harmen defeats white's fellousi abdelaz in 58 moves | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Nc3 Nxe4 5. Nxe4 d5 6. Bd3 dxe4 7. Bxe4 Bd6 8. d3 Ne7 9. Nd2 f5 10. Bf3 O-O 11. Nc4 Rb8 12. Bg5 Be6 13. Nxd6 cxd6 14. O-O Qc7 15. Bxe7 Qxe7 16. Qd2 Qc7 17. a4 a5 18. Rfc1 Bd7 19. Bd5+ Kh8 20. d4 Bc6 21. c4 f4 22. Ra3 e4 23. Rcc3 Bxd5 24. cxd5 Qf7 25. g3 e3 26. Qe2 Qxd5 27. fxe3 fxe3 28. Qxe3 Rbe8 29. Qd2 Rf1+ |
| ECO C47 in 2001 play it! jonkman harmen defeats white's michiels bart in 92 moves | 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. g3 Bc5 5. Bg2 d6 6. d3 a6 7. O-O Be6 8. Be3 Bxe3 9. fxe3 Ne7 10. h3 c6 11. Qd2 Ng6 12. d4 h6 13. a4 a5 14. Kh2 O-O 15. Rf2 Qb6 16. Ng1 Qxb2 17. Rb1 Qa3 18. Rff1 d5 19. Rxb7 Rfd8 20. Nge2 Ne8 21. Qc1 Qf8 22. exd5 cxd5 23. Nb5 Nd6 24. Rb6 Qe7 25. Rxd6 Rxd6 26. Nxd6 Qxd6 27. c4 Rb8 28. c5 Qc6 29. Nc3 Rb4 30. Rd1 Ne7 31. Qa3 e4 32. Rb1 Rxb1 33. Nxb1 Nf5 34. Nd2 Qc7 35. Nf1 h5 36. Qc1 h4 37. Qe1 Bd7 38. Qf2 g6 39. Kg1 hxg3 40. Qa2 Bc6 41. Qb3 Qb7 42. Nd2 Qxb3 43. Nxb3 Bxa4 44. Nxa5 Kf8 45. Bf1 Ke7 46. Ba6 Nxe3 |
| ECO C48 in 2005 play it! jonkman harmen defeats white's balint andras in 82 moves | 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4 5. Bc4 Bc5 6. Nxe5 Qe7 7. Nd3 d5 8. Nxd5 Qxe4+ 9. Ne3 Bd6 10. c3 Nf5 11. Qf3 Qxf3 12. gxf3 Nh4 13. Ke2 O-O 14. Ne1 c5 15. N1g2 Nxg2 16. Nxg2 Bh3 17. Ne3 Nh5 18. Kd1 Nf4 19. Bf1 Bd7 20. d4 cxd4 21. Nc4 Bc7 22. cxd4 Bc6 23. Be2 Rad8 24. Be3 Rfe8 25. Rc1 f5 26. Bxf4 Bxf4 27. Ne3 Rxd4+ 28. Kc2 Bxe3 29. fxe3 Rxe3 30. Rhe1 Kf8 31. Rcd1 Rxd1 32. Kxd1 Bxf3 33. Bxf3 Rxf3 34. Re2 Rd3+ 35. Ke1 Kf7 36. Rc2 Rd7 37. Kf2 g5 38. Kf3 Kf6 39. Kg3 h6 40. Kf3 g4+ 41. Kf4 Rd3 |
| ECO C45 in 2003 play it! jonkman harmen defeats white's bensdorp laura in 64 moves | 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bb4+ 5. c3 Bc5 6. Be3 Bb6 7. Be2 Nf6 8. Nd2 O-O 9. O-O Re8 10. Nxc6 bxc6 11. Bxb6 axb6 12. Bd3 d6 13. h3 Nd7 14. Re1 Nc5 15. Bc2 Qf6 16. a3 Ne6 17. Qf3 Nf4 18. Rad1 Ra5 19. e5 Raxe5 20. Rxe5 dxe5 21. Be4 c5 22. Nf1 Rd8 23. Ne3 Be6 24. Kf1 h6 25. Ke1 Bb3 26. Rxd8+ Qxd8 27. Qg4 g6 28. g3 h5 29. Qf3 Nxh3 30. Qe2 Ng5 31. Bc6 e4 32. Nc4 Nf3+ |
| ECO C45 in 2001 play it! jonkman harmen defeats white's hoogendoorn joos in 136 moves | 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qf6 5. Be3 Bc5 6. c3 Qg6 7. Nb5 Bxe3 8. fxe3 Kd8 9. Nd2 Nf6 10. Qa4 d6 11. O-O-O Bg4 12. Re1 Re8 13. Bd3 Ne5 14. Bc2 Nfd7 15. Qa3 Nc5 16. c4 Be6 17. Rd1 Kc8 18. b4 Ncd7 19. Qa5 Nb6 20. c5 Nc6 21. Qa3 dxc5 22. bxc5 Nd7 23. Nf3 Qh5 24. e5 Ndxe5 25. Nxe5 Qxe5 26. Nd4 Bd7 27. Rhf1 f6 28. Rd2 a5 29. Nxc6 bxc6 30. Rf4 Qa1+ 31. Bb1 Rb8 32. Qd3 Rxb1+ 33. Qxb1 Qc3+ 34. Qc2 Qa1+ 35. Qb1 Qc3+ 36. Kd1 Qxe3 37. Qd3 Qg1+ 38. Rf1 Bg4+ 39. Kc1 Qxc5+ 40. Rc2 Qb5 41. Qc4 Be2 42. Qxb5 cxb5 43. Re1 Bh5 44. Rxe8+ Bxe8 45. a4 b4 46. Rc5 Bxa4 47. Kb2 Kb7 48. Rxa5 Bc6 49. g3 Kb6 50. Rh5 h6 51. Kb3 Be8 52. Rh4 c5 53. Re4 Bf7+ 54. Ka4 Bd5 55. Re1 Bc6+ 56. Kb3 Kb5 57. Kc2 c4 58. Re7 g6 59. Re6 Kc5 60. Rxf6 Be4+ 61. Kb2 Kd4 62. Rf8 Bd5 63. Rf4+ Kd3 64. Rf8 c3+ 65. Kc1 b3 66. Rd8 Kc4 67. Rc8+ Kb4 68. Rd8 b2+ |
| ECO C67 in 2000 play it! jonkman harmen defeats white's dutreeuw marc in 74 moves | 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6 6. Bxc6 dxc6 7. dxe5 Nf5 8. Qxd8+ Kxd8 9. Nc3 Bd7 10. Ne4 h6 11. Bd2 c5 12. Rad1 Kc8 13. Rfe1 b6 14. Bc3 Ne7 15. Nh4 Be6 16. f4 Kb7 17. h3 Kc6 18. a3 b5 19. Nf3 Nd5 20. Bd2 g6 21. Rf1 Be7 22. Nh2 h5 23. Nf3 a5 24. Nfg5 a4 25. Rc1 b4 26. Rf3 bxa3 27. bxa3 c4 28. Rb1 Rhb8 29. Rxb8 Rxb8 30. Nxe6 fxe6 31. Bc1 Rb1 32. Rf1 h4 33. Kf2 Ra1 34. Ng5 Bxg5 35. fxg5 Ra2 36. Kf3 Rxc2 37. Kg4 Rxg2+ |
| ECO C47 in 2001 play it! jonkman harmen defeats white's karstens bart in 79 moves | 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 exd4 5. Nd5 Nb4 6. Nxf6+ Qxf6 7. a3 Nc6 8. Bd3 d6 9. Bg5 Qg6 10. O-O Bg4 11. Bh4 Qh5 12. Bg3 Bxf3 13. gxf3 g6 14. f4 Qxd1 15. Raxd1 Bg7 16. e5 O-O-O 17. Rfe1 Rhe8 18. Bh4 Rd7 19. exd6 Rxe1+ 20. Rxe1 Rxd6 21. Re8+ Kd7 22. Rg8 Bf6 23. Bg3 Re6 24. f5 Re1+ 25. Kg2 Rb1 26. Rf8 Nd8 27. fxg6 hxg6 28. b3 Be7 29. Rh8 Bxa3 30. Rh7 Be7 31. f4 a6 32. f5 g5 33. Be5 c5 34. Rg7 Re1 35. Bg3 Rc1 36. Be5 Nc6 37. Bg3 f6 38. Kf3 b5 39. Be4 Nb4 40. Ke2 |
| ECO C47 in 2001 play it! jonkman harmen defeats white's hendriks richard in 132 moves | 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. a3 g6 5. Nxe5 Nxe5 6. d4 Nc6 7. e5 Ng8 8. Bc4 d6 9. Qf3 Be6 10. Bxe6 fxe6 11. exd6 cxd6 12. O-O Qf6 13. Qe2 O-O-O 14. d5 exd5 15. Nxd5 Qe5 16. Qb5 Nf6 17. c4 Nxd5 18. cxd5 Nd4 19. Qa5 Bg7 20. Qxa7 Qxd5 21. Be3 Kd7 22. Rfd1 Ra8 23. Qb6 Ra6 24. Qb4 Nc2 25. Rxd5 Nxb4 26. Rb5 Bxb2 27. Rd1 Bxa3 28. Rxb7+ Kc6 29. Rf7 Nc2 30. Bg5 Bb2 31. Bf6 Bxf6 32. Rxd6+ Kxd6 33. Rxf6+ Ke5 34. Rxa6 Rd8 35. h3 Rd7 36. Ra5+ Ke4 37. Rc5 Nd4 38. Rc4 Kd3 39. Ra4 Rf7 40. Ra3+ Kd2 41. Ra2+ Nc2 42. Ra8 Nb4 43. Rd8+ Nd3 44. Rd6 Re7 45. Rf6 Ke2 46. Ra6 Nb4 47. Ra4 Nd5 48. Ra2+ Kd3 49. Ra3+ Ke4 50. Ra4+ Ke5 51. Ra5 Rf7 52. Rb5 Ra7 53. Kh2 g5 54. Kg1 Ra1+ 55. Kh2 Ra2 56. Kg1 h5 57. Rb8 Ra5 58. Rh8 Nf6 59. Rb8 Kf5 60. Rc8 h4 61. Rf8 Ra1+ 62. Kh2 Ra2 63. Kg1 Kg6 64. Rb8 Ne4 65. Rg8+ Kf7 66. Rb8 Nxf2 |
| ECO C45 in 2001 play it! jonkman harmen defeats white's smeets jan in 68 moves | 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qf6 5. Nxc6 Bc5 6. Qd2 dxc6 7. Nc3 Be6 8. Na4 Bd6 9. Qe3 Nh6 10. h3 Qe7 11. Bd3 f6 12. f4 Nf7 13. Qf2 h5 14. O-O g5 15. e5 fxe5 16. f5 Bd7 17. Be4 Qf6 18. Nc5 Bxc5 19. Qxc5 b6 20. Qc3 g4 21. Qg3 gxh3 22. Qg6 Ke7 23. Rd1 Rad8 24. Be3 hxg2 25. Bf2 h4 26. Re1 Rdg8 27. Qxf6+ Kxf6 28. Rad1 Bxf5 29. Bxc6 h3 30. Kh2 Ng5 31. Be3 Rd8 32. c3 Rd6 33. Rxd6+ cxd6 34. Rd1 Rd8 |
| ECO C67 in 1999 play it! jonkman harmen defeats white's sylvan jacob in 84 moves | 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6 6. Bxc6 dxc6 7. dxe5 Ne4 8. Qxd8+ Kxd8 9. Re1 Nc5 10. Nc3 Bg4 11. Nd4 Ne6 12. Nxe6+ Bxe6 13. Ne4 h6 14. Ng3 Bb4 15. c3 Be7 16. Be3 a5 17. f4 g6 18. Ne4 b6 19. Kf2 Kc8 20. Kf3 h5 21. h3 h4 22. Bf2 a4 23. Nf6 Ra5 24. Red1 Bxf6 25. exf6 Bd5+ 26. Kg4 Bxg2 27. Bxh4 Rah5 28. Bg3 Bxh3+ 29. Kf3 Be6 30. Rd4 b5 31. a3 Rf5 32. Re1 Rxf6 33. Re5 Rh5 34. Rxh5 gxh5 35. Bh4 Rg6 36. Rd8+ Kb7 37. Rh8 Bg4+ 38. Ke3 Re6+ 39. Kd4 Re2 40. Rh7 Kb6 41. Rh6 Bf5 42. Rxh5 c5+ |