| ECO A04 in 2000 play it! berkvens joost defeats white's kowalczyk stefan in 74 moves | 1. Nf3 f5 2. d4 Nf6 3. c4 g6 4. Nc3 Bg7 5. e3 O-O 6. Bd3 d6 7. O-O Nc6 8. d5 Nb4 9. Bb1 c6 10. Qa4 a5 11. Rd1 Nd7 12. Rd2 Nb6 13. Qb3 a4 14. Qd1 Nxc4 15. Rd4 cxd5 16. Nxd5 Nxd5 17. Rxc4 e6 18. Rxa4 Nc3 19. bxc3 Rxa4 20. Qxa4 Bxc3 21. Bxf5 Bxa1 22. Bd3 Bg7 23. h4 Bd7 24. Qc2 Qb6 25. Qe2 Qc5 26. Bd2 Ra8 27. Be1 Ra4 28. g3 Qd5 29. Nd2 b5 30. e4 Qe5 31. f4 Qc5+ 32. Kh2 Rxa2 33. g4 Qc1 34. e5 dxe5 35. f5 exf5 36. gxf5 Bh6 37. Qg2 Rxd2 |
| ECO A05 in 2003 play it! berkvens joost defeats white's libeau rene in 58 moves | 1. Nf3 Nf6 2. c4 d6 3. g3 e5 4. Nc3 g6 5. Bg2 Bg7 6. O-O O-O 7. d3 h6 8. Rb1 a5 9. a3 Re8 10. b4 axb4 11. axb4 e4 12. Nd4 e3 13. Bxe3 Ng4 14. Qd2 Nxe3 15. fxe3 Qg5 16. Rf4 Be5 17. Rh4 h5 18. Nd5 Bg4 19. Nb3 Qd8 20. d4 Bf6 21. Nxf6+ Qxf6 22. Bxb7 Ra3 23. Bd5 Qg5 24. Rf1 Re7 25. Nc1 Raxe3 26. Rf4 Nd7 27. Kf2 Nf6 28. h3 Nxd5 29. cxd5 Bd7 |
| ECO A06 in 2001 play it! berkvens joost defeats white's werle jan in 78 moves | 1. Nf3 d5 2. d4 Nf6 3. c4 e6 4. Nc3 Be7 5. Bg5 O-O 6. Rc1 h6 7. Bh4 b6 8. cxd5 Nxd5 9. Nxd5 exd5 10. Bxe7 Qxe7 11. g3 Bf5 12. Bg2 Be4 13. O-O c5 14. Ne5 Bxg2 15. Kxg2 Re8 16. e3 Na6 17. Qf3 Nc7 18. b3 a5 19. a4 Ne6 20. Rfd1 Ng5 21. Qf5 g6 22. Qf4 Kg7 23. Nf3 Red8 24. h4 Ne6 25. Qg4 h5 26. Qh3 Rac8 27. Rc2 Qf6 28. Rdc1 Rb8 29. Rd1 Rbc8 30. Rdc1 Rc7 31. g4 hxg4 32. Qxg4 Rh8 33. Rd1 Rh5 34. Qg3 Rc8 35. dxc5 bxc5 36. Rcd2 d4 37. exd4 cxd4 38. Kg1 Rc3 39. Rd3 Nf4 |
| ECO A00 in 2000 play it! berkvens joost defeats white's wilschut peter by checkmate in 70 moves | 1. g3 g6 2. Bg2 Bg7 3. d3 d5 4. Nd2 e5 5. e4 Ne7 6. Ngf3 O-O 7. O-O Nbc6 8. Re1 h6 9. c3 a5 10. a3 a4 11. exd5 Nxd5 12. Nc4 Re8 13. h3 Qd7 14. Qe2 b6 15. d4 Ba6 16. dxe5 Na5 17. Nfd2 Nxc4 18. Nxc4 Qc6 19. Bf1 b5 20. Ne3 Nxe3 21. fxe3 Qc5 22. Qf3 Rad8 23. Kh2 Qxe5 24. e4 g5 25. Bg2 Bb7 26. Rf1 f5 27. Qxf5 Qxf5 28. Rxf5 Bxe4 29. Rf1 Bxg2 30. Kxg2 Rd3 31. h4 Re2+ 32. Kh3 Be5 33. Kg4 Rxg3+ 34. Kh5 Kg7 35. hxg5 Rh2# |
| ECO B90 in 2000 play it! berkvens joost defeats white's balogh csaba in 60 moves | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3 Be6 8. Qd2 Be7 9. f4 exf4 10. Bxf4 Nc6 11. O-O-O Ne5 12. Be2 O-O 13. h3 b5 14. g4 Rc8 15. Kb1 Ng6 16. g5 Nxf4 17. Qxf4 Nd7 18. h4 Qc7 19. Nd4 Nb6 20. Bd3 Qc5 21. Nf5 Rfe8 22. h5 Qe5 23. Qf2 Bxf5 24. exf5 Rxc3 25. Qxb6 Bxg5 26. bxc3 Qxc3 27. Qxd6 Bf6 28. Qxf6 Qxf6 29. Rhe1 Rxe1 30. Rxe1 Kf8 |
| ECO B56 in 2000 play it! berkvens joost defeats white's shklovski vladis in 94 moves | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. f3 e5 7. Nb3 Be6 8. Be3 Be7 9. Qe2 a5 10. O-O-O Qb8 11. Kb1 O-O 12. Nd5 Bxd5 13. exd5 Nb4 14. Qb5 Qc8 15. Bc4 Bd8 16. a3 Na6 17. Qa4 Nd7 18. Bb5 Nb6 19. Qe4 Nc7 20. Bxb6 Nxb5 21. Be3 Nc7 22. c4 f5 23. Qc2 Na6 24. c5 a4 25. Nc1 Nxc5 26. Bxc5 dxc5 27. Nd3 Bf6 28. Nxc5 Ra5 29. Ne6 Qxc2+ 30. Kxc2 Rc8+ 31. Kb1 Kf7 32. g4 g6 33. g5 Bh8 34. h4 Rb5 35. Rd2 e4 36. fxe4 fxe4 37. Rf1+ Ke7 38. Nf4 Kd6 39. h5 gxh5 40. Rh1 Rf8 41. Nxh5 e3 42. Rc2 Rf2 43. Nf6 Bxf6 44. gxf6 Rxd5 45. Re1 Rxc2 46. Kxc2 Re5 47. Kd1 e2+ |
| ECO B31 in 2001 play it! berkvens joost defeats white's tsiamis konstant in 70 moves | 1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. c3 Bg7 5. d4 Qb6 6. Bxc6 bxc6 7. O-O cxd4 8. cxd4 Nf6 9. Nc3 d6 10. h3 O-O 11. b3 c5 12. dxc5 Qxc5 13. Bb2 Qa5 14. Nd5 Nxd5 15. Bxg7 Kxg7 16. exd5 Bb7 17. Qd4+ Kg8 18. Rfd1 Rac8 19. Nh2 Qc5 20. Ng4 Qxd4 21. Rxd4 f5 22. Ne3 f4 23. Nc4 Rc5 24. Rad1 Rf5 25. b4 Rcxd5 26. Na5 Ba8 27. a4 Rg5 28. Rxd5 Bxd5 29. Rxd5 Rxd5 30. Nc6 Rd1+ 31. Kh2 Kf7 32. Nxa7 Ke6 33. b5 Kd7 34. b6 Rb1 35. a5 d5 |
| ECO B53 in 2000 play it! berkvens joost defeats white's van den berg adr in 74 moves | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 a6 5. c4 Nc6 6. Qd2 Nf6 7. Nc3 g6 8. b3 Bg7 9. Bb2 O-O 10. h3 Rb8 11. Bd3 b5 12. cxb5 axb5 13. O-O Qa5 14. Rfe1 b4 15. Nd1 Rd8 16. Rc1 Bb7 17. Bb1 Qa8 18. Nd4 e5 19. Nxc6 Bxc6 20. Rc4 d5 21. Rxb4 Nxe4 22. Bxe4 dxe4 23. Rxb8 Qxb8 24. Qa5 h5 25. Ne3 Bb5 26. a4 Bd3 27. b4 f5 28. Nd5 Qd6 29. Nc3 Rc8 30. Qd5+ Qxd5 31. Nxd5 Rc2 32. Ba1 Ra2 33. a5 Kf7 34. Rc1 Bh6 35. Ne3 Bxe3 36. fxe3 f4 37. Bxe5 f3 |
| ECO B20 in 2000 play it! berkvens joost defeats white's jong ewoudt in 88 moves | 1. e4 c5 2. d4 cxd4 3. c3 d5 4. exd5 Nf6 5. Bb5+ Bd7 6. Bc4 dxc3 7. Nxc3 Na6 8. Nf3 g6 9. Ne5 Bg7 10. Nxd7 Nxd7 11. Be3 O-O 12. Bd4 Ne5 13. Bxa6 bxa6 14. O-O Rb8 15. f4 Nd7 16. Bxg7 Kxg7 17. Qd4+ Nf6 18. Qxa7 Rxb2 19. Rab1 Rxb1 20. Rxb1 Qa5 21. Qd4 Rc8 22. Rb3 Qc5 23. Qxc5 Rxc5 24. Kf1 Nxd5 25. Nxd5 Rxd5 26. Ke2 Ra5 27. a3 Kf6 28. Kf3 Rb5 29. Rc3 a5 30. Ke4 h5 31. g3 e6 32. h3 g5 33. Rd3 Rb2 34. Rc3 Rh2 35. g4 hxg4 36. hxg4 Rf2 37. fxg5+ Kxg5 38. Rc5+ Kxg4 39. Rxa5 f5+ 40. Ke3 Rf3+ 41. Ke2 Rb3 42. a4 Kf4 43. Ra6 e5 44. a5 Ra3 |
| ECO B33 in 2001 play it! berkvens joost defeats white's wortel marten in 96 moves | 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be3 Ng4 7. Bb5 Nxe3 8. fxe3 Bd7 9. Bxc6 bxc6 10. O-O e6 11. e5 d5 12. Qf3 Qe7 13. b4 g6 14. Na4 Bg7 15. Qf4 O-O 16. Nc5 a5 17. a3 Be8 18. Rae1 axb4 19. axb4 Ra3 20. Ra1 Qa7 21. Ndb3 Rxa1 22. Rxa1 Qb8 23. Nd3 f6 24. exf6 e5 25. Qg4 Rxf6 26. Ndc5 h5 27. Qh4 d4 28. Nd3 dxe3 29. Qe4 Bf7 30. Nbc5 Rd6 31. Rf1 Bd5 32. Qxe3 e4 33. Nxe4 Re6 34. Ndc5 Qb6 35. Qf2 Rxe4 36. Nxe4 Bd4 37. Nf6+ Kh8 38. Nxd5 cxd5 39. g3 Qxb4 40. h4 Bxf2+ 41. Rxf2 Qe1+ 42. Kg2 d4 43. Rf8+ Kg7 44. Rc8 Qe2+ 45. Kg1 Kf6 46. Rf8+ Ke7 47. Rf2 Qe3 48. Kg2 Ke6 |
| ECO B50 in 2000 play it! berkvens joost defeats white's monteban martijn in 92 moves | 1. e4 c5 2. Nf3 d6 3. c3 Nf6 4. Be2 Nbd7 5. d3 g6 6. O-O Bg7 7. Nbd2 O-O 8. Re1 b6 9. Nf1 Bb7 10. Ng3 c4 11. d4 Nxe4 12. Bxc4 Nxg3 13. hxg3 e5 14. dxe5 dxe5 15. Bb5 e4 16. Bxd7 exf3 17. gxf3 Qf6 18. Bh3 Rad8 19. Qe2 Rde8 20. Be3 Bxf3 21. Qf1 h5 22. Bd4 Qg5 23. Bxg7 Kxg7 24. Qd3 Qf6 25. Bg2 Bg4 26. Qd4 Rd8 27. Qxf6+ Kxf6 28. f3 Bf5 29. Re2 g5 30. Kf2 Bd3 31. Rd2 Bc4 32. Rad1 Rxd2+ 33. Rxd2 Bxa2 34. Rd7 Be6 35. Rxa7 Rd8 36. Ke1 h4 37. gxh4 gxh4 38. Ra1 Ke5 39. Ra4 h3 40. Re4+ Kf6 41. Bh1 Bb3 42. Kf2 Rd1 43. Re1 Rxe1 44. Kxe1 Ke5 45. f4+ Kxf4 46. Kf2 f5 |
| ECO B22 in 1999 play it! berkvens joost defeats white's vajda levente in 58 moves | 1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 e6 5. Nf3 Nf6 6. Be3 cxd4 7. cxd4 Be7 8. Nc3 Qd6 9. Bd3 Nc6 10. a3 O-O 11. Qc2 h6 12. O-O b6 13. Rad1 Bb7 14. Rfe1 Rfd8 15. Qe2 Rac8 16. Bb1 Bf8 17. Bc1 Ne7 18. Ne5 Nf5 19. d5 Bxd5 20. Nxd5 Nxd5 21. Qf3 Qc7 22. g4 Nh4 23. Qg3 Be7 24. g5 hxg5 25. Bxg5 Bxg5 26. Qxg5 Qxe5 27. Qh5 Qf4 28. Qh7+ Kf8 29. Rd3 Rc1 |
| ECO B31 in 2001 play it! berkvens joost defeats white's schalkx johnny in 78 moves | 1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. O-O Bg7 5. Re1 e5 6. Bxc6 bxc6 7. d3 Ne7 8. Nc3 O-O 9. a3 a5 10. Be3 d6 11. Qd2 Bg4 12. Ng5 h6 13. h3 Bh5 14. g4 hxg5 15. Bxg5 f6 16. Bh6 g5 17. Bxg7 Kxg7 18. gxh5 Rh8 19. Ne2 Rxh5 20. Ng3 Rxh3 21. Kg2 Qd7 22. Rh1 Rah8 23. Rxh3 Qxh3+ 24. Kf3 Rh4 25. Qxa5 Qg4+ 26. Kg2 Ng6 27. Qc7+ Kh6 28. Kf1 Nf4 29. Ke1 Qf3 30. Qf7 Rh1+ 31. Kd2 Qxf2+ 32. Kc3 Ne2+ 33. Kb3 c4+ 34. Ka4 Nxg3 35. Qf8+ Kh5 36. Rxh1+ Nxh1 37. Qh8+ Kg4 38. Qxh1 Qxc2+ 39. Ka5 cxd3 |
| ECO B63 in 2003 play it! berkvens joost defeats white's widmer simon in 40 moves | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 Be7 8. O-O-O Qb6 9. f4 O-O 10. Nxc6 bxc6 11. e5 dxe5 12. fxe5 Nd5 13. Nxd5 Bxg5 14. Qxg5 exd5 15. Rd3 Rb8 16. Rb3 Qa5 17. c3 Rxb3 18. axb3 Qa1+ 19. Kc2 f6 20. exf6 Rxf6 |
| ECO B90 in 2000 play it! berkvens joost defeats white's kallio heikki in 114 moves | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3 Be6 8. f3 Be7 9. Qd2 Nbd7 10. O-O-O b5 11. g4 h6 12. Kb1 Nb6 13. Qf2 Rb8 14. h4 b4 15. Nd5 Nbxd5 16. exd5 Nxd5 17. Bc1 a5 18. Qa7 Ra8 19. Bb5+ Kf8 20. Qf2 a4 21. Rxd5 Bxd5 22. Nd2 Qc8 23. Bd3 h5 24. g5 Qc5 25. Qe2 g6 26. Rf1 Be6 27. f4 Kg7 28. b3 Rhe8 29. Bb2 a3 30. Ba1 Bg4 31. Qe1 Bf5 32. Ne4 Qd5 33. fxe5 dxe5 34. Rxf5 gxf5 35. Ng3 Ra5 36. Bxf5 Rd8 37. Kc1 Qf3 38. Bxe5+ Kf8 39. Bc7 Re8 40. Be4 Rd5 41. c4 Bc5 42. cxd5 Be3+ 43. Kc2 Rxe4 44. Bd6+ Kg8 45. Qf1 Qxf1 46. Nxf1 Bf2 47. Kd3 Rd4+ 48. Ke2 Bxh4 49. Ke3 Rd1 50. Nh2 Bxg5+ 51. Ke4 f5+ 52. Ke5 Rd2 53. Nf3 Rxa2 54. Bxb4 Re2+ 55. Kxf5 a2 56. Bc3 Re3 57. Bd4 Rxf3+ |
| ECO B98 in 2000 play it! berkvens joost defeats white's vinck martin in 80 moves | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 Nbd7 9. Bc4 h6 10. Qh3 Nb6 11. Bb3 Rf8 12. Bh4 e5 13. Nf5 Bxf5 14. exf5 exf4 15. O-O-O Qc7 16. Bxf6 Bxf6 17. Rhe1+ Be5 18. f6 gxf6 19. Ne4 Kd8 20. Qxh6 Nd7 21. Rd5 a5 22. Ba4 Rc8 23. Nxf6 Bxb2+ 24. Kd1 Qc4 25. Rxd6 Kc7 26. Rxd7+ Kb8 27. Bb3 Qb4 28. Nd5 Qd4+ 29. Ke2 Rfe8+ 30. Re7 Rxe7+ 31. Nxe7 Bc3 32. Rd1 Qe4+ 33. Kf1 f3 34. Qd6+ Ka8 35. gxf3 Qxf3+ 36. Kg1 Qe3+ 37. Kh1 Qf3+ 38. Kg1 Bb4 39. Qd4 Bc5 40. Nxc8 Qxd1+ |
| ECO B50 in 2001 play it! berkvens joost defeats white's lazar ales ml in 84 moves | 1. e4 c5 2. Nf3 d6 3. c3 Nf6 4. Be2 Nbd7 5. d3 g6 6. O-O Bg7 7. Nbd2 O-O 8. Re1 e5 9. Bf1 b6 10. Nc4 Qc7 11. Bg5 h6 12. Bh4 Re8 13. Ne3 Bb7 14. c4 Nf8 15. Bxf6 Bxf6 16. g3 Bg7 17. Bh3 Bc8 18. Bxc8 Raxc8 19. Qa4 Ne6 20. Qb5 Rf8 21. Nd5 Qb7 22. Qb3 f5 23. Rf1 Qd7 24. Rae1 f4 25. Qd1 h5 26. h4 Bh6 27. Nh2 Nd4 28. g4 f3 29. Kh1 Bf4 30. Rg1 hxg4 31. Ne3 Bxh2 32. Kxh2 Rf4 33. Nd5 g5 34. h5 g3+ 35. Rxg3 Rh4+ 36. Kg1 Rf8 37. Qd2 Rg4 38. Kh2 Rxg3 39. fxg3 Qg4 40. Qf2 Qxh5+ 41. Kg1 Kf7 42. Re3 Ne2+ |
| ECO B93 in 2000 play it! berkvens joost defeats white's tiviakov sergei in 60 moves | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f4 e6 7. Be2 Qc7 8. a4 b6 9. Bf3 Bb7 10. O-O Nc6 11. Be3 Be7 12. f5 e5 13. Nb3 Na5 14. Nxa5 bxa5 15. Qd2 O-O 16. g4 d5 17. exd5 Bb4 18. g5 Ne8 19. f6 g6 20. Qd3 Rc8 21. Na2 Nd6 22. Rf2 e4 23. Bxe4 Nxe4 24. Qxe4 Rfe8 25. Qd4 Rxe3 26. Nxb4 Re5 27. Qh4 h5 28. gxh6 Rh5 29. Nxa6 Qe5 30. Qf4 Rg5+ |
| ECO B25 in 2001 play it! berkvens joost defeats white's campuano neto fa in 46 moves | 1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. f4 Nf6 7. Nf3 O-O 8. O-O Rb8 9. h3 b5 10. g4 b4 11. Ne2 a5 12. Qe1 Ba6 13. e5 dxe5 14. fxe5 Nd5 15. e6 fxe6 16. Nf4 Nxf4 17. Bxf4 Rxf4 18. Qxe6+ Kh8 19. Ne5 Nd4 20. Qxa6 Ne2+ 21. Kh2 Bxe5 22. Rxf4 Bxf4+ 23. Kh1 Bg5 |
| ECO B50 in 2000 play it! berkvens joost defeats white's luethgens eike in 60 moves | 1. e4 c5 2. Nf3 d6 3. g3 Nc6 4. Bg2 g6 5. O-O Bg7 6. c3 e5 7. d3 Nge7 8. Nbd2 O-O 9. Ne1 Be6 10. f4 exf4 11. Rxf4 d5 12. Rf1 d4 13. c4 Qd7 14. Ndf3 h6 15. a3 Rae8 16. Rb1 f5 17. Qc2 Rd8 18. Nd2 Ne5 19. h3 b6 20. Kh2 g5 21. b4 cxb4 22. axb4 N5g6 23. exf5 Nxf5 24. Ne4 Qc7 25. c5 Nxg3 26. Nxg3 Be5 27. Rxf8+ Rxf8 28. cxb6 Bxg3+ 29. Kg1 Qe5 30. Nf3 Rxf3 |