| ECO C16 in 1989 play it! weyerstrass defeats white's nn by checkmate in 80 moves | 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 Qd7 5. f4 b6 6. a3 Bxc3+ 7. bxc3 Ne7 8. Nf3 Ba6 9. Bxa6 Nxa6 10. Qd3 Nb8 11. O-O Nbc6 12. a4 h5 13. Nh4 g6 14. Ba3 Nf5 15. Nxf5 gxf5 16. Rae1 Na5 17. Bb4 Nc4 18. Ra1 a5 19. Ba3 Qxa4 20. Be7 Qc6 21. Bf6 Rh7 22. Rf2 Kd7 23. Qg3 Re8 24. Bh4 Qa8 25. Qg5 Kc6 26. Rf3 Nd2 27. Rg3 Ne4 28. Qg7 Rxg7 29. Rxg7 Rg8 30. Rxf7 Qe8 31. Re7 Qg6 32. g3 Qg4 33. Rxe6+ Kb5 34. c4+ dxc4 35. Be7 Nxg3 36. Rb1+ Ka6 37. hxg3 Qxg3+ 38. Kf1 Qf3+ 39. Ke1 Rg1+ 40. Kd2 c3# |
| ECO C01 in 1975 play it! weyerstrass defeats white's kloeck in 28 moves | 1. e4 e6 2. d4 d5 3. Qe2 dxe4 4. Qxe4 Nf6 5. Qd3 Nbd7 6. Nf3 b6 7. h3 Bb7 8. Be2 c5 9. Nc3 Rc8 10. Nb5 a6 11. Nd6+ Bxd6 12. Qxa6 Bxa6 13. Bxa6 O-O 14. Bxc8 Qxc8 |
| ECO C01 in 1982 play it! weyerstrass defeats white's voortman in 54 moves | 1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nf3 Bg4 5. Be2 Bd6 6. Nc3 Ne7 7. Be3 c6 8. h3 Bxf3 9. Bxf3 Nd7 10. Qd3 h6 11. O-O O-O 12. Rfe1 Ng6 13. Bh5 Qf6 14. Bg4 Nb6 15. b3 Rae8 16. Qf5 Qxf5 17. Bxf5 Nh4 18. Bd3 Re7 19. Re2 Bb4 20. Bd2 Rxe2 21. Bxe2 Nf5 22. a3 Be7 23. Be3 Bf6 24. Rd1 Re8 25. Rd3 Nc8 26. Na4 Bxd4 27. Bxd4 Rxe2 |
| ECO C01 in 1974 play it! weyerstrass defeats white's brouwer j in 44 moves | 1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nf3 Bg4 5. Be2 Bd6 6. Nc3 Ne7 7. Bd2 O-O 8. O-O Nbc6 9. Be3 Qd7 10. Nb5 Rae8 11. Nxd6 Qxd6 12. Qd2 Bxf3 13. Bxf3 Nd8 14. Bf4 Qd7 15. Qa5 Ne6 16. Be3 f5 17. Rae1 f4 18. Bd2 Nxd4 19. Bh5 g6 20. Bd1 f3 21. Qxa7 Qg4 22. Bxf3 Nxf3+ |
| ECO C00 in 1983 play it! weyerstrass defeats white's van den bergh p in 79 moves | 1. e4 e6 2. e5 d5 3. exd6 Bxd6 4. d4 Nd7 5. Nf3 b6 6. d5 Qe7 7. Be3 Bb7 8. Bc4 exd5 9. Bxd5 c6 10. Bb3 O-O-O 11. O-O Ne5 12. Nbd2 c5 13. Nxe5 Qxe5 14. Qg4+ Kb8 15. Qg3 Qf5 16. Qg5 Ne7 17. Rad1 f6 18. Qxf5 Nxf5 19. Nc4 Bc7 20. a4 a6 21. Bc1 Nd4 22. Ne3 b5 23. axb5 axb5 24. Ba2 Be4 25. c4 b4 26. b3 Ne2+ 27. Kh1 Nc3 28. Rxd8+ Rxd8 29. f3 Nxa2 30. fxe4 Nxc1 31. Rxc1 Bf4 32. Rd1 Re8 33. Nd5 Rxe4 34. Kg1 Be5 35. Rd2 Re1+ 36. Kf2 Rb1 37. Rd3 Bxh2 38. g3 Bg1+ 39. Kf3 Bd4 40. Ne7 |
| ECO C01 in 1979 play it! weyerstrass defeats white's knoppert in 61 moves | 1. e4 e6 2. d4 d5 3. exd5 exd5 4. Bd3 c5 5. dxc5 Bxc5 6. Nf3 Ne7 7. O-O Nbc6 8. h3 O-O 9. Nc3 Nb4 10. Ne2 Nxd3 11. Qxd3 Bf5 12. Qb5 Rc8 13. c3 a6 14. Qb3 Bd3 15. Re1 Nc6 16. Qd1 Be4 17. Ned4 Qb6 18. Re2 Nxd4 19. Nxd4 Qg6 20. g4 f5 21. Re3 fxg4 22. Qxg4 Qf6 23. Re2 Bxd4 24. cxd4 Qxd4 25. Be3 Qf6 26. Rd2 Rc6 27. f4 Qh6 28. Kh2 Rg6 29. Qd7 Qh4 30. Rg1 Rxg1 31. Kxg1 |
| ECO C02 in 1973 play it! weyerstrass defeats white's zwanikken in 114 moves | 1. e4 e6 2. d4 d5 3. e5 c5 4. Nf3 Nc6 5. Bb5 cxd4 6. Bxc6+ bxc6 7. Nxd4 Qc7 8. f4 Ba6 9. Bd2 Ne7 10. Nc3 Rb8 11. b3 c5 12. Nde2 Nc6 13. Na4 Be7 14. Be3 d4 15. Bd2 O-O 16. O-O f6 17. exf6 Bxf6 18. Nxc5 Bc8 19. Rb1 Be7 20. Ne4 Ba6 21. c4 Qb6 22. N2g3 e5 23. Qh5 g6 24. Qg4 Nb4 25. Nf5 Rxf5 26. Bxb4 Bxb4 27. fxe5 Rxf1+ 28. Rxf1 d3+ 29. Kh1 Bc8 30. Nf6+ Kh8 31. Qh4 Qb7 32. Nd5 Bf5 33. Qf6+ Qg7 34. Nxb4 Qxf6 35. exf6 Rxb4 36. Rd1 Kg8 37. Kg1 Kf7 38. h3 Kxf6 39. g4 Be4 40. Kf2 Ke5 41. Ke3 Rb7 42. Kd2 Kd4 43. Kc1 Rf7 44. Kb2 Ke3 45. Kc3 Rf2 46. c5 Rc2+ 47. Kb4 d2 48. Kb5 Rc1 49. Rxd2 Kxd2 50. b4 Kd3 51. a4 Kd4 52. a5 Bd3+ 53. Kc6 a6 54. Kb6 Kd5 55. g5 Bf1 56. h4 Bb5 57. Kc7 Rb1 |
| ECO C02 in 1987 play it! weyerstrass defeats white's bouts p in 76 moves | 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Qb6 5. Nf3 Bd7 6. Qc2 cxd4 7. cxd4 Nc6 8. Be3 Nge7 9. Nc3 Nf5 10. Rd1 Rc8 11. a3 Be7 12. Be2 f6 13. exf6 Bxf6 14. Qd2 Na5 15. O-O O-O 16. h3 Be8 17. Bd3 Bg6 18. Bxf5 Bxf5 19. Rfe1 Nc4 20. Qe2 Nxb2 21. Rc1 Nd3 22. Nxd5 exd5 23. Rxc8 Rxc8 24. Rd1 Nb2 25. Rc1 Nc4 26. Re1 Re8 27. Qd1 Qc6 28. g4 Nxe3 29. fxe3 Be4 30. Nd2 Qc7 31. Nxe4 Rxe4 32. Qf3 Bxd4 33. Rf1 Bxe3+ 34. Kg2 Qc2+ 35. Kg3 Bf4+ 36. Kh4 Qc6 37. g5 Bxg5+ 38. Kg3 Re3 |
| ECO C00 in 1976 play it! weyerstrass defeats white's van haasteren in 66 moves | 1. e4 e6 2. Nf3 d5 3. Nc3 Bb4 4. exd5 exd5 5. Qe2+ Ne7 6. Qb5+ Nbc6 7. Ne5 Bxc3 8. dxc3 O-O 9. Nxc6 Nxc6 10. Be3 a6 11. Qd3 Re8 12. O-O-O Be6 13. f4 Qd7 14. h3 Bf5 15. Qd2 Be4 16. Rg1 b5 17. Kb1 Qe7 18. Bf2 Rad8 19. g4 Na5 20. Qd4 Qd6 21. f5 Rb8 22. h4 b4 23. cxb4 Rxb4 24. Qc3 Reb8 25. b3 Rxb3+ 26. axb3 Rxb3+ 27. Qxb3 Nxb3 28. Kb2 Na5 29. Bd3 Qb4+ 30. Kc1 Nb3+ 31. Kb2 Nd4+ 32. Kc1 Qa3+ 33. Kd2 Nf3+ |
| ECO C02 in 1973 play it! weyerstrass defeats white's bangma in 20 moves | 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Qb6 5. Na3 cxd4 6. cxd4 Bb4+ 7. Bd2 Qxd4 8. Qa4+ Nc6 9. Nf3 Bxd2+ 10. Nxd2 Qxa4 |
| ECO C07 in 1991 play it! weyerstrass defeats white's mascini in 96 moves | 1. e4 e6 2. d4 d5 3. Nd2 c5 4. Ngf3 Nc6 5. Bb5 cxd4 6. exd5 Qxd5 7. Qe2 Nf6 8. O-O Bc5 9. Nb3 Bb6 10. Rd1 O-O 11. Bxc6 Qxc6 12. Nbxd4 Qe4 13. Qxe4 Nxe4 14. Be3 f6 15. c4 e5 16. Nc2 Bxe3 17. Nxe3 Be6 18. h3 Kf7 19. Kf1 Rfd8 20. Ke2 Ke7 21. Rac1 Rac8 22. Nd2 Nc5 23. Rc3 a5 24. f3 f5 25. Nb3 Na4 26. Rc2 b6 27. Rxd8 Rxd8 28. Nc1 f4 29. b3 Nc5 30. Ng4 Bf5 31. Rd2 Rxd2+ 32. Kxd2 e4 33. Ne2 g5 34. h4 Bxg4 35. fxg4 h6 36. hxg5 hxg5 37. Nc3 Kd6 38. Ke2 Ke5 39. Nd5 Nd7 40. a3 b5 41. Ne7 bxc4 42. bxc4 Kd6 43. Nf5+ Kc5 44. Ng7 Nf8 45. Ne8 Kxc4 46. Nd6+ Kd5 47. Nb5 Nd7 48. Nc7+ Ke5 |
| ECO C16 in 1989 play it! weyerstrass defeats white's nn in 77 moves | 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 Qd7 5. a3 Bxc3+ 6. bxc3 b6 7. f4 Ba6 8. Bd3 Bxd3 9. Qxd3 Nc6 10. Nf3 Nge7 11. a4 Na5 12. Qb5 Nc4 13. Qxd7+ Kxd7 14. O-O g6 15. Nd2 Nxd2 16. Bxd2 Nc6 17. g4 h5 18. f5 gxf5 19. gxf5 Rag8+ 20. Kh1 Rh7 21. fxe6+ fxe6 22. Rf6 Ne7 23. Rh6 Rxh6 24. Bxh6 Nf5 25. Bd2 Rg4 26. a5 Re4 27. axb6 axb6 28. Rg1 c5 29. Rg5 h4 30. Rh5 Re2 31. Rh6 Ke8 32. Bg5 Rxc2 33. dxc5 bxc5 34. Bxh4 Rxc3 35. Rh8+ Kf7 36. Bf6 d4 37. h4 d3 38. Rd8 Nd4 39. h5 |
| ECO C02 in 1984 play it! weyerstrass defeats white's sjamaar in 110 moves | 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Qb6 5. Nf3 Bd7 6. Be2 Bb5 7. O-O Bxe2 8. Qxe2 Qa6 9. Qd1 Nd7 10. Re1 Ne7 11. b3 Nc6 12. Bg5 h6 13. Bf4 Rc8 14. h3 Be7 15. a3 b6 16. Nbd2 Qd3 17. Re3 Qf5 18. Bg3 cxd4 19. cxd4 O-O 20. Rc3 Ncxe5 21. Nxe5 Rxc3 22. Nxd7 Rfc8 23. Ne5 Bxa3 24. Kh2 Rc1 25. Rxc1 Rxc1 26. Qe2 Qc2 27. Qh5 Qf5 28. Qe2 Qc2 29. Bf4 Bd6 30. Qg4 Qf5 31. Qxf5 exf5 32. Ne4 fxe4 33. Bxc1 f6 34. Bb2 fxe5 35. dxe5 Bc7 36. Kg1 g6 37. e6 Kf8 38. Ba3+ Ke8 39. Kf1 Bd8 40. Ke2 Be7 41. Bc1 Bc5 42. Bxh6 Ke7 43. f3 Kxe6 44. fxe4 dxe4 45. g4 Bd4 46. Be3 Bg7 47. Bf4 a5 48. Ke3 Kd5 49. Bc7 Bd4+ 50. Kf4 e3 51. Kg5 e2 52. Bg3 Bc3 53. Kxg6 e1=Q 54. Bxe1 Bxe1 55. Kf5 b5 |
| ECO C01 in 1987 play it! weyerstrass defeats white's thurkov in 52 moves | 1. e4 e6 2. d4 d5 3. Bd3 c5 4. c3 Nc6 5. Nf3 dxe4 6. Bxe4 Nf6 7. Bxc6+ bxc6 8. Bf4 Qb6 9. Qb3 Ba6 10. Nbd2 cxd4 11. Nxd4 c5 12. N4f3 Be7 13. c4 O-O 14. O-O Bb7 15. Ne5 Rfd8 16. Rad1 Nd7 17. Rfe1 Bf6 18. Qe3 Nxe5 19. Bxe5 Bxe5 20. Qxe5 Rd4 21. Nb3 Rg4 22. Rd6 Rxg2+ 23. Kf1 Qb4 24. Rxe6 Qxc4+ 25. Re2 fxe6 26. Nxc5 Rxf2+ |
| ECO C01 in 1976 play it! weyerstrass defeats white's snel in 88 moves | 1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nf3 Bd6 5. Nc3 Ne7 6. Bd3 Bg4 7. O-O Nbc6 8. Be3 Qd7 9. a3 O-O-O 10. Nb5 Rde8 11. Nxd6+ Qxd6 12. c3 f5 13. b4 f4 14. Bd2 g5 15. Re1 Ng6 16. Be2 Qf6 17. h3 Bh5 18. b5 Nce7 19. Ne5 Bxe2 20. Qxe2 Nf5 21. Qh5 Nxe5 22. Rxe5 Rxe5 23. dxe5 Qg6 24. Qxg6 hxg6 25. e6 Re8 26. Re1 c6 27. bxc6 bxc6 28. Re5 Kc7 29. h4 Kd6 30. Rxf5 gxf5 31. hxg5 Kxe6 32. Bxf4 c5 33. Kf1 Kd7 34. Be3 Kc6 35. Bc1 d4 36. cxd4 cxd4 37. f4 Kd5 38. Kf2 Ke4 39. Ke2 Rc8 40. Kd1 Rc3 41. a4 Rg3 42. Kc2 Rxg2+ 43. Kb3 d3 44. Kc3 Rc2+ |
| ECO C02 in 1976 play it! weyerstrass defeats white's weststrate in 68 moves | 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Qb6 5. Nf3 Bd7 6. Be2 Bb5 7. a4 Bxe2 8. Qxe2 Qa6 9. Qb5+ Nc6 10. dxc5 Ne7 11. Be3 Ng6 12. Bd4 Be7 13. O-O O-O 14. Qxa6 bxa6 15. b4 Rab8 16. Re1 f6 17. Na3 fxe5 18. Bxe5 Ngxe5 19. Nxe5 Nxe5 20. Rxe5 Bf6 21. Re3 d4 22. Re4 dxc3 23. Rc1 Rbd8 24. g3 Rd2 25. Rc2 Rd1+ 26. Kg2 Ra1 27. Rxe6 Rxa3 28. Rxa6 Rb3 29. b5 Rb2 30. Rxf6 Rxc2 31. Rxf8+ Kxf8 32. a5 Rb2 33. b6 axb6 34. axb6 c2 |
| ECO C00 in 1989 play it! weyerstrass defeats white's kerkmeester in 32 moves | 1. e4 e6 2. d3 d5 3. Nd2 Nf6 4. g3 dxe4 5. dxe4 Bc5 6. Bg2 e5 7. Ne2 Bxf2+ 8. Kxf2 Ng4+ 9. Kg1 Ne3 10. Qe1 Nxc2 11. Qd1 Nxa1 12. Bf1 Nc6 13. Nc3 Be6 14. Be2 Nd4 15. Bd3 Qd7 16. Kg2 Bg4 |
| ECO C02 in 1979 play it! weyerstrass defeats white's wieringa in 56 moves | 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Qb6 5. Nf3 Bd7 6. a3 a5 7. Nbd2 Nc6 8. Nb3 cxd4 9. Nbxd4 Nge7 10. Bd3 Nxd4 11. cxd4 Nc6 12. Bc2 Be7 13. O-O O-O 14. Rb1 Rac8 15. Qd3 g6 16. Rd1 f6 17. exf6 Bxf6 18. Bh6 Rfe8 19. Be3 Ne7 20. b4 axb4 21. Rxb4 Qa6 22. Qb3 Nc6 23. Bd3 Qa8 24. Ra4 Na5 25. Rxa5 Qxa5 26. Qxb7 Bc6 27. Qb2 Rb8 28. Qe2 Qxa3 |
| ECO C02 in 1990 play it! weyerstrass defeats white's vedder by checkmate in 74 moves | 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Qb6 5. Nf3 Bd7 6. Be2 Bb5 7. O-O Bxe2 8. Qxe2 Qa6 9. Qxa6 Nxa6 10. dxc5 Bxc5 11. Nd4 Ne7 12. Kh1 O-O 13. Nd2 Bxd4 14. cxd4 Rac8 15. Nf3 Nb4 16. Bd2 Nbc6 17. Rac1 Nf5 18. Bc3 b5 19. b3 h5 20. Rfd1 f6 21. h3 h4 22. Kg1 Kf7 23. Kf1 Ke7 24. Ke2 Kd7 25. Be1 Ncxd4+ 26. Nxd4 Nxd4+ 27. Rxd4 Rxc1 28. exf6 gxf6 29. Rxh4 Rc2+ 30. Bd2 Rxa2 31. Rh7+ Kd6 32. b4 Rc8 33. Kd3 e5 34. h4 Rcc2 35. Bh6 Rxf2 36. Bf8+ Ke6 37. Bc5 Ra3# |
| ECO C01 in 1976 play it! weyerstrass defeats white's hooijer in 64 moves | 1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nf3 Bd6 5. Bd3 Ne7 6. O-O Bg4 7. Bg5 Nbc6 8. c3 Qd7 9. Re1 O-O-O 10. Nbd2 Rde8 11. Bxe7 Nxe7 12. Nf1 Ng6 13. Ne3 Nf4 14. Bf1 h5 15. g3 Ng6 16. Be2 f5 17. Qd3 Rh6 18. h3 Bxh3 19. Ng5 f4 20. Nf1 Bf5 21. Bg4 Bxg4 22. Rxe8+ Qxe8 23. f3 Bd7 24. c4 fxg3 25. cxd5 g2 26. Ne3 Nf4 27. Qe4 Qxe4 28. Nxe4 Rg6 29. Nxd6+ cxd6 30. Kh2 h4 31. Rg1 h3 32. Nc4 Ne2 |