| ECO D31 in 1986 play it! weyerstrass defeats black's sinclair super c by checkmate in 55 moves | 1. d4 d5 2. c4 e6 3. Nc3 Nc6 4. Nf3 Bb4 5. e3 Bxc3+ 6. bxc3 Nge7 7. cxd5 exd5 8. c4 Bf5 9. Bb2 O-O 10. Rc1 a5 11. cxd5 Nb4 12. Bc4 Qd6 13. O-O a4 14. Re1 a3 15. Ba1 Be4 16. Nd2 Bxd5 17. e4 Bxc4 18. Nxc4 Qd7 19. Ne5 Qd6 20. Qd2 Ra4 21. d5 Rfa8 22. Re3 c6 23. Rg3 Ng6 24. Nxg6 hxg6 25. Rh3 cxd5 26. Rh8+ Kxh8 27. Qh6+ Kg8 28. Qxg7# |
| ECO D60 in 1973 play it! weyerstrass defeats black's van der wal in 81 moves | 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. cxd5 Nxd5 8. Bxe7 Qxe7 9. Nxd5 exd5 10. Qc2 Nf6 11. Bd3 h6 12. O-O Ne4 13. Rfc1 c6 14. Bxe4 Qxe4 15. Qxe4 dxe4 16. Nd2 Re8 17. b4 f6 18. Rab1 Be6 19. a4 Bd5 20. Nc4 Bxc4 21. Rxc4 Rac8 22. Rbc1 Red8 23. Kf1 Kf7 24. Ke2 g5 25. f3 exf3+ 26. gxf3 Rd6 27. b5 Ke6 28. e4 h5 29. bxc6 bxc6 30. Ke3 Kd7 31. Rb1 Rc7 32. Rb8 Rc8 33. Rxc8 Kxc8 34. Rc5 Kb7 35. h3 Kc8 36. Kd3 Kd8 37. Ra5 Rd7 38. Kc4 Rc7 39. Kc5 Kd7 40. Ra6 h4 41. a5 |
| ECO D21 in 1972 play it! weyerstrass defeats black's bronkhorst in 65 moves | 1. d4 d5 2. c4 dxc4 3. Nf3 Nc6 4. e3 Nf6 5. Bxc4 h6 6. Nc3 Bg4 7. h3 Bxf3 8. Qxf3 e6 9. Bb5 Qd7 10. O-O a6 11. Ba4 Bb4 12. Rd1 Bxc3 13. bxc3 b5 14. Bb3 Rd8 15. Ba3 a5 16. Rac1 Nd5 17. e4 Nde7 18. Qg4 O-O 19. Rd3 e5 20. d5 Qxg4 21. hxg4 b4 22. cxb4 axb4 23. Bb2 Nd4 24. Bxd4 exd4 25. Rxc7 Ng6 26. Rxd4 Nf4 27. Rxb4 Ne2+ 28. Kf1 Nf4 29. Rbb7 Rc8 30. d6 Rxc7 31. dxc7 Ne6 32. Bxe6 fxe6 33. Rb8 |
| ECO D51 in 1973 play it! weyerstrass defeats black's karman a in 57 moves | 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. cxd5 exd5 6. e3 Bb4 7. Bd3 O-O 8. Nf3 c6 9. O-O Re8 10. Qc2 Nf8 11. a3 Ba5 12. b4 Bc7 13. b5 h6 14. Bh4 Bg4 15. Nd2 Be6 16. Bg3 Rc8 17. bxc6 Bxg3 18. hxg3 bxc6 19. Na4 Qd6 20. Nc5 Rb8 21. Rfc1 Rec8 22. Ndb3 N8d7 23. Ba6 Rc7 24. Rab1 Nb6 25. Na5 Bc8 26. a4 Ra8 27. Nab7 Bxb7 28. Nxb7 Qa3 29. Nc5 |
| ECO D34 in 1973 play it! weyerstrass defeats black's de jong j in 47 moves | 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. dxc5 d4 10. Na4 Ne4 11. Nxd4 Nxc5 12. Nxc6 bxc6 13. Nxc5 Bxc5 14. Qxd8 Rxd8 15. Bxc6 Rb8 16. Kg2 Ba6 17. Bf3 h6 18. b3 Bd4 19. Rb1 Bc3 20. Bf4 Rb4 21. Rfd1 Rxd1 22. Rxd1 Rxf4 23. gxf4 Ba5 24. Rd7 |
| ECO D15 in 1972 play it! weyerstrass defeats black's baart joan in 61 moves | 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Bd3 a6 7. O-O dxc4 8. Bxc4 b5 9. Bd3 c5 10. e4 cxd4 11. Nxd4 Nc5 12. e5 Nxd3 13. Qxd3 Nd5 14. Rd1 Bb7 15. Nxd5 Qxd5 16. Qg3 f6 17. Bf4 Rd8 18. exf6 gxf6 19. Qg4 e5 20. Nf5 Qf7 21. Rxd8+ Kxd8 22. Be3 Rg8 23. Qd1+ Ke8 24. g3 Qe6 25. Qh5+ Rg6 26. Qxh7 Qd5 27. Qxg6+ Kd7 28. Qh7+ Kd8 29. Bb6+ Ke8 30. Qh5+ Kd7 31. Rd1 |
| ECO D54 in 1973 play it! weyerstrass defeats black's zeeman in 57 moves | 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 Nc6 6. Nf3 b6 7. cxd5 exd5 8. Bb5 Bd7 9. Rc1 a6 10. Ba4 O-O 11. Bxf6 gxf6 12. Nxd5 Bb4+ 13. Nxb4 Nxb4 14. Bxd7 Qxd7 15. a3 Nd5 16. Nd2 Rae8 17. Qf3 Re6 18. O-O Rfe8 19. e4 Ne7 20. Qg3+ Kh8 21. d5 Rg8 22. dxe6 Qxe6 23. Qxc7 Qg4 24. g3 h5 25. Qxe7 h4 26. Qxf6+ Kh7 27. Qxf7+ Kh8 28. Rc6 Rg7 29. Rh6+ |
| ECO D54 in 1980 play it! weyerstrass defeats black's sargon compute by checkmate in 51 moves | 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 Nc6 6. Nf3 O-O 7. Rc1 h6 8. Bf4 g5 9. Bg3 Na5 10. cxd5 exd5 11. Bd3 Be6 12. h4 g4 13. Ne5 b6 14. f3 Nh5 15. Kf2 Nxg3 16. Kxg3 gxf3 17. gxf3 Nb7 18. Bb1 a5 19. Qc2 f5 20. Rcg1 c5 21. Qg2 cxd4 22. Kf2+ Bg5 23. hxg5 dxe3+ 24. Ke2 hxg5 25. Qxg5+ Qxg5 26. Rxg5# |
| ECO D06 in 1972 play it! weyerstrass defeats black's de boer by checkmate in 95 moves | 1. d4 d5 2. c4 Nf6 3. cxd5 Nxd5 4. Nf3 Bf5 5. Nc3 Nb4 6. e4 Bg6 7. Qa4+ N8c6 8. d5 e6 9. dxc6 b6 10. a3 Nd3+ 11. Bxd3 Qxd3 12. Qd1 Bxe4 13. Qxd3 Bxd3 14. Bf4 Bd6 15. Bxd6 cxd6 16. Rd1 Bc4 17. Rxd6 O-O 18. Ne5 Bd5 19. Nxd5 exd5 20. O-O f6 21. Nd3 Rac8 22. Re1 Rfd8 23. Rxd8+ Rxd8 24. Re7 Rc8 25. Rd7 Rxc6 26. Rxd5 a5 27. g3 h5 28. Rxh5 Kf7 29. Kf1 Rc2 30. Rb5 Rc6 31. Ke2 Rc2+ 32. Ke3 g5 33. Rxb6 Kg6 34. b4 Ra2 35. bxa5 Rxa3 36. Ra6 Kf7 37. Kd4 f5 38. h4 gxh4 39. gxh4 Ra4+ 40. Ke5 Rxh4 41. Kxf5 Rh3 42. Ne5+ Ke7 43. f4 Ra3 44. Re6+ Kf8 45. Kf6 Rxa5 46. Ng6+ Kg8 47. Re8+ Kh7 48. Rh8# |
| ECO D06 in 1971 play it! weyerstrass defeats black's noordijk in 50 moves | 1. d4 d5 2. c4 Nf6 3. cxd5 Nxd5 4. Nf3 Bg4 5. e4 Nf6 6. Nc3 Nc6 7. Bb5 a6 8. Bxc6+ bxc6 9. O-O e6 10. Bg5 h6 11. Bxf6 Qxf6 12. Qa4 Ke7 13. Qxc6 Rd8 14. Ne5 h5 15. Qxc7+ Ke8 16. Nc6 Rd7 17. Qc8+ Rd8 18. Nxd8 Qxd8 19. Qxd8+ Kxd8 20. f3 Bb4 21. fxg4 Bxc3 22. bxc3 hxg4 23. Rxf7 g3 24. hxg3 g5 25. d5 exd5 |
| ECO D30 in 1977 play it! weyerstrass defeats black's cornelisse a in 101 moves | 1. d4 d5 2. c4 e6 3. cxd5 exd5 4. Nc3 Nf6 5. Bg5 Be7 6. e3 O-O 7. Bd3 c6 8. Qc2 h6 9. Bf4 Nbd7 10. Nf3 Nb6 11. O-O Bd6 12. Be5 Bg4 13. Nd2 Re8 14. h3 Bh5 15. f4 Qe7 16. Rae1 c5 17. Bxd6 Qxd6 18. Nb5 Qd7 19. dxc5 Nc8 20. Nd4 Ne7 21. N2f3 Bxf3 22. Nxf3 Nc6 23. a3 Re7 24. b4 Rae8 25. b5 Nb8 26. Ne5 Qc7 27. Bf5 Nfd7 28. Bxd7 Nxd7 29. Nxd7 Qxd7 30. Qd3 Re4 31. Rf2 Rc4 32. a4 Rxc5 33. Rd2 Qe6 34. Kf2 Rec8 35. Qd4 Rc2 36. Ree2 R2c5 37. Rd3 Qe7 38. g3 Qe6 39. g4 Qe7 40. Kg3 Qe6 41. Qe5 Qxe5 42. fxe5 Kf8 43. Red2 Rd8 44. e4 d4 45. Rxd4 Rxd4 46. Rxd4 Rxe5 47. Kf4 f6 48. Rd7 Re7 49. Rd8+ Kf7 50. Ra8 b6 51. Rc8 |
| ECO D54 in 1975 play it! weyerstrass defeats black's ter steeg in 56 moves | 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 Nbd7 6. Nf3 O-O 7. cxd5 Nxd5 8. Nxd5 exd5 9. Bxe7 Qxe7 10. Bd3 Qb4+ 11. Qd2 Qxd2+ 12. Nxd2 Nf6 13. O-O Bd7 14. b4 c6 15. Nb3 b6 16. a4 a6 17. Rfc1 Rfc8 18. Rc2 b5 19. Nc5 Be8 20. Rca2 Nd7 21. axb5 Nxc5 22. bxc5 cxb5 23. Rxa6 Rab8 24. Bf5 Rc7 25. Ra8 Rcb7 26. Bc8 Rxa8 27. Rxa8 Re7 28. Bd7 Kf8 |
| ECO D52 in 1972 play it! weyerstrass defeats black's den dulk in 105 moves | 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6 6. Nf3 Bb4 7. Rc1 O-O 8. a3 Bxc3+ 9. Rxc3 a6 10. Bd3 h6 11. Bh4 Qc7 12. Bg3 Qd8 13. Nd2 b5 14. cxd5 cxd5 15. Bc7 Qe7 16. O-O e5 17. dxe5 Nxe5 18. Bxe5 Qxe5 19. Nf3 Qd6 20. h3 Be6 21. Qd2 Rad8 22. Rd1 Qe7 23. Nd4 Bd7 24. Qc2 Rc8 25. Ne2 d4 26. Nxd4 Nd5 27. Rxc8 Rxc8 28. Qd2 Nf6 29. Bf5 Ne4 30. Bxe4 Qxe4 31. Qd3 Qg6 32. Qxg6 fxg6 33. f3 Be8 34. Kf2 Kf7 35. Ke2 Kf6 36. Kd2 g5 37. Rc1 Rd8 38. Kd3 Bg6+ 39. e4 Ke5 40. Rc5+ Kf4 41. b4 h5 42. g3+ Kxg3 43. Rxg5+ Kxh3 44. Rxg6 Rd7 45. e5 h4 46. e6 Re7 47. Nf5 Re8 48. e7 Ra8 49. Re6 g6 50. Nxh4 Kxh4 51. e8=Q Rxe8 52. Rxe8 g5 53. Ke3 |
| ECO D54 in 1974 play it! weyerstrass defeats black's cornelisse a in 129 moves | 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 h6 6. Bh4 Nbd7 7. Nf3 O-O 8. cxd5 exd5 9. Bd3 Re8 10. O-O c6 11. Rb1 a5 12. a3 Bd6 13. b4 axb4 14. axb4 b5 15. e4 dxe4 16. Nxe4 Be7 17. Re1 Bb7 18. Qb3 Ra4 19. Nxf6+ Nxf6 20. Bxf6 Bxf6 21. Ne5 Bxe5 22. Rxe5 Rxe5 23. dxe5 Bc8 24. Bc2 Be6 25. Qc3 Ra6 26. Rd1 Bd5 27. Be4 Qd7 28. h3 Qe6 29. Bb1 Ra8 30. f4 g6 31. g4 Qe8 32. f5 Qd8 33. fxg6 fxg6 34. Bxg6 Ra2 35. Be4 Qb6+ 36. Qd4 Qxd4+ 37. Rxd4 Bxe4 38. Rxe4 Kf8 39. Rf4+ Kg7 40. Rf6 Re2 41. Rxc6 Rxe5 42. Rb6 h5 43. Kf2 hxg4 44. hxg4 Re4 45. Rxb5 Rxg4 46. Kf3 Rh4 47. Ke3 Kf6 48. Kd3 Ke6 49. Kc3 Kd6 50. Rc5 Rh1 51. Kb3 Ra1 52. Rc3 Rb1+ 53. Ka4 Ra1+ 54. Kb5 Kd7 55. Kb6 Rh1 56. b5 Rh5 57. Ka6 Rh8 58. Kb7 Rh5 59. Rd3+ Ke6 60. b6 Rb5 61. Kc6 Rb1 62. Re3+ Kf7 63. Re5 Kf8 64. b7 Kf7 65. Rb5 |
| ECO D11 in 1972 play it! weyerstrass defeats black's karman in 47 moves | 1. d4 d5 2. c4 c6 3. Nf3 Bg4 4. Nc3 Nf6 5. cxd5 cxd5 6. Qb3 b6 7. Bf4 Nc6 8. e3 Nd7 9. Bb5 Rc8 10. Qxd5 Nb4 11. Qb3 Bxf3 12. gxf3 e6 13. a3 Rxc3 14. bxc3 Nd5 15. Bg3 Be7 16. Rg1 O-O 17. Bd3 Qc8 18. c4 N5f6 19. e4 Nh5 20. Qc2 Qb7 21. Ke2 Rc8 22. f4 f6 23. Qb3 Kf8 24. f5 |
| ECO D51 in 1973 play it! weyerstrass defeats black's lenselink in 55 moves | 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 Be7 6. Nf3 h6 7. Bh4 Ne4 8. Bxe7 Qxe7 9. cxd5 Nxc3 10. bxc3 exd5 11. c4 dxc4 12. Bxc4 Qb4+ 13. Nd2 O-O 14. O-O Nf6 15. Qc2 Re8 16. Rfe1 Qa5 17. e4 Qg5 18. Nf3 Qf4 19. Ne5 Be6 20. g3 Qg5 21. Bxe6 Rxe6 22. Qxc7 Rf8 23. Qxb7 Rb6 24. Qxa7 Rb2 25. Rab1 Rc2 26. Rb8 Qd2 27. Qxf7+ Kh7 28. Qg6+ |
| ECO D31 in 1972 play it! weyerstrass defeats black's baart joan in 105 moves | 1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. a4 Bb4 6. e3 b5 7. Bd2 a5 8. axb5 Bxc3 9. Bxc3 cxb5 10. b3 Bb7 11. bxc4 b4 12. Bb2 Nf6 13. Bd3 Be4 14. O-O Bxd3 15. Qxd3 a4 16. Rfb1 O-O 17. e4 Nbd7 18. Bc1 Qa5 19. e5 Ng4 20. h3 Nh6 21. Ng5 Nf5 22. g4 h6 23. gxf5 hxg5 24. Bxg5 Rfb8 25. fxe6 fxe6 26. Kh1 Nf8 27. Rg1 Rb7 28. Rg3 Raa7 29. d5 b3 30. dxe6 Nxe6 31. Bd2 Qc7 32. Rgg1 Qc6+ 33. Kh2 Nc5 34. Qd8+ Kh7 35. Qh4+ Kg8 36. Qd8+ Kf7 37. Rxg7+ Kxg7 38. Rg1+ Qg6 39. Qf6+ Kg8 40. Qxg6+ Rg7 41. Qe8+ Kh7 42. Rxg7+ Rxg7 43. Bc3 a3 44. Qh5+ Kg8 45. Qe8+ Kh7 46. Qh5+ Kg8 47. e6 b2 48. Qe8+ Kh7 49. e7 Rxe7 50. Qxe7+ Kg6 51. Bxb2 axb2 52. Qd6+ Kg7 53. Qd4+ |
| ECO D25 in 1972 play it! weyerstrass defeats black's rooyakkers in 93 moves | 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 c5 5. Bxc4 a6 6. O-O e6 7. Qe2 b5 8. Bb3 Bb7 9. Rd1 c4 10. Bc2 Qc7 11. e4 Be7 12. Bg5 h6 13. Bh4 O-O 14. Nc3 Re8 15. e5 Nd5 16. Qe4 Nf6 17. Qf4 Nd5 18. Qe4 Nf6 19. Qf4 Nd5 20. Qg4 Nxc3 21. Bf6 Ne2+ 22. Kf1 Bf8 23. Kxe2 Nd7 24. Nd2 Nxf6 25. exf6 e5 26. d5 Bxd5 27. fxg7 Bxg7 28. Ne4 Red8 29. Nf6+ Kf8 30. Nxd5 Qc5 31. Be4 Rac8 32. Qf3 b4 33. Bg6 Rd7 34. Bf5 e4 35. Qh3 Rxd5 36. Bxc8 Rd3 37. Qf5 Qd4 38. Bxa6 Qxb2+ 39. Kf1 Qc2 40. Qc8+ Ke7 41. Qc5+ Kf6 42. Rdc1 Qa4 43. Bxc4 Rd2 44. Bb5 Qa5 45. Qc6+ Kg5 46. Rc5+ f5 47. Qxe4 |
| ECO D30 in 1971 play it! weyerstrass defeats black's baart joan by checkmate in 41 moves | 1. d4 d5 2. c4 e6 3. e3 Nf6 4. Nf3 c6 5. Nc3 a6 6. c5 Nbd7 7. b4 a5 8. b5 Rb8 9. Bd3 Be7 10. O-O Bf8 11. Re1 Ng4 12. e4 dxe4 13. Nxe4 Ndf6 14. Bf4 Ra8 15. Nd6+ Bxd6 16. Bxd6 Nd5 17. Ne5 Nxf2 18. Qf3 f6 19. Qh5+ g6 20. Qxg6+ hxg6 21. Bxg6# |
| ECO A40 in 1976 play it! weyerstrass defeats black's jos in 71 moves | 1. d4 e6 2. c4 d5 3. cxd5 exd5 4. Nc3 c5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. Bg5 cxd4 10. Nxd4 h6 11. Be3 Re8 12. Qa4 Ne5 13. Rad1 Nc4 14. Bc1 Be6 15. Nxe6 fxe6 16. e4 Nb6 17. Qb3 Kh8 18. exd5 exd5 19. Nxd5 Nbxd5 20. Bxd5 Nxd5 21. Rxd5 Qc8 22. Bf4 Bf6 23. Rfd1 Re2 24. R5d2 Qe8 25. Qxb7 Rxd2 26. Rxd2 Qe1+ 27. Kg2 Re8 28. Qf3 Qb1 29. Bxh6 Qg6 30. Be3 Rc8 31. Rd5 Rc2 32. Rh5+ Kg8 33. Qd5+ Kf8 34. Rh8+ Ke7 35. Qd8+ Ke6 36. Re8+ |