| ECO A36 in 1980 play it! weyerstrass defeats black's van der wal in 49 moves | 1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Rb1 Rb8 6. a3 a6 7. b4 cxb4 8. axb4 b5 9. cxb5 axb5 10. Nf3 e6 11. O-O Nge7 12. d4 d5 13. Bf4 Rb7 14. Qd3 Qb6 15. Rfd1 Nf5 16. e3 O-O 17. g4 Nh6 18. h3 Ne7 19. Bf1 Bd7 20. Ne5 Bxe5 21. dxe5 Kg7 22. e4 Bc6 23. Qf3 dxe4 24. Bxh6+ Kxh6 25. Qf6 |
| ECO A21 in 1978 play it! weyerstrass defeats black's sibbing a in 79 moves | 1. c4 e5 2. Nc3 Bb4 3. g3 Nf6 4. Bg2 O-O 5. e4 a5 6. Nge2 d6 7. O-O Nc6 8. d3 h6 9. h3 Bc5 10. Kh2 Nd4 11. Be3 Qe8 12. Bxd4 exd4 13. Nb5 Bb6 14. f4 Bg4 15. Bf3 Bxf3 16. Rxf3 d5 17. e5 dxc4 18. dxc4 d3 19. Ned4 Ne4 20. Qxd3 Nc5 21. Qc2 Rd8 22. Rd1 Ne6 23. Nxe6 Qxe6 24. Rfd3 Qe7 25. Nc3 Rxd3 26. Qxd3 Qb4 27. Rd2 Qc5 28. Qf1 Qe3 29. Qd1 c6 30. b3 h5 31. Rd3 Qf2+ 32. Kh1 Ba7 33. Ne4 Qb6 34. c5 Qb4 35. Rd4 Qa3 36. Qc2 b5 37. Rd6 a4 38. Ng5 f5 39. exf6 Rxf6 40. Rd8+ |
| ECO A20 in 1985 play it! weyerstrass defeats black's masmeijer in 63 moves | 1. c4 e5 2. g3 g6 3. Bg2 Bg7 4. Nc3 Nc6 5. d3 Nge7 6. Rb1 a5 7. a3 O-O 8. e3 d6 9. Nge2 Bd7 10. b4 axb4 11. axb4 Qc8 12. h3 h6 13. Qc2 Kh7 14. Bd2 Nd8 15. f4 c6 16. Ne4 Qc7 17. fxe5 Bxe5 18. d4 Bg7 19. O-O f5 20. Nf2 g5 21. e4 Ng6 22. c5 Ne6 23. exf5 Rxf5 24. Qxf5 Nf4 25. Qe4 Re8 26. gxf4 Rxe4 27. Bxe4 d5 28. Bd3 Qc8 29. fxg5 Bf5 30. Rb3 Nh4 31. Ng4 h5 32. Rxf5 |
| ECO A22 in 1981 play it! weyerstrass defeats black's maartense in 97 moves | 1. c4 e5 2. Nc3 Nf6 3. g3 Nc6 4. Bg2 Bb4 5. Nd5 O-O 6. Nxb4 Nxb4 7. d3 d5 8. a3 Nc6 9. cxd5 Nxd5 10. b4 Be6 11. Nf3 f6 12. Bb2 Qd7 13. O-O Rfd8 14. Rc1 Rac8 15. Nd2 Nce7 16. Nb3 Qb5 17. Qc2 c6 18. h3 b6 19. d4 Qa4 20. dxe5 Nxb4 21. axb4 Bxb3 22. Qc3 Nd5 23. Bxd5+ cxd5 24. Qd4 fxe5 25. Qxe5 Qd7 26. e3 Re8 27. Qd4 Qf7 28. Qg4 Bc4 29. Rfd1 Rcd8 30. Rd4 b5 31. Rf4 Qd7 32. Ra1 Qxg4 33. Rxg4 Rd7 34. Bd4 Re4 35. Rg5 Ree7 36. Bc5 Rf7 37. Re5 h6 38. Re8+ Kh7 39. h4 h5 40. Ra8 Kg6 41. Bxa7 Rf3 42. Rh8 Rdf7 43. Ra6+ Kf5 44. Bb8 Kg4 45. Bf4 d4 46. Kg2 Be2 47. Re8 Rf6 48. Rxf6 gxf6 49. e4 |
| ECO A15 in 1990 play it! weyerstrass defeats black's wiesenekker in 53 moves | 1. c4 Nf6 2. g3 e6 3. Bg2 d5 4. Nf3 c5 5. O-O Nc6 6. cxd5 exd5 7. d4 Be7 8. Nc3 O-O 9. Bg5 c4 10. Ne5 Be6 11. f4 Ng4 12. Nxg4 Bxg4 13. Nxd5 Bxg5 14. fxg5 Qxg5 15. Nf4 Rad8 16. d5 Qe5 17. h3 Bc8 18. Qd2 b5 19. e4 a5 20. Rad1 f5 21. Qc3 Qxc3 22. bxc3 Ne5 23. Rb1 g5 24. Ne6 Bxe6 25. dxe6 fxe4 26. Bxe4 Rxf1+ 27. Kxf1 |
| ECO A13 in 1989 play it! weyerstrass defeats black's vedder in 61 moves | 1. c4 e6 2. g3 g6 3. Bg2 Bg7 4. Nc3 Ne7 5. e4 d6 6. d3 c5 7. Nge2 Nbc6 8. Bg5 a6 9. Qd2 h6 10. Be3 Nd4 11. Rb1 Nec6 12. O-O h5 13. a3 Bd7 14. b4 b6 15. f4 h4 16. bxc5 bxc5 17. e5 dxe5 18. Ne4 Nxe2+ 19. Qxe2 Nd4 20. Bxd4 exd4 21. Nxc5 Ra7 22. Nxd7 Kxd7 23. c5 Qa5 24. Qe4 Qxc5 25. Rfc1 Qd5 26. Qe1 Qd6 27. Qa5 Rc8 28. Qa4+ Kd8 29. Rxc8+ Kxc8 30. Qe8+ Kc7 31. Rc1+ |
| ECO A11 in 1987 play it! weyerstrass defeats black's hilhorst r in 71 moves | 1. c4 c6 2. Nc3 d5 3. cxd5 cxd5 4. d4 Nf6 5. Nf3 Nc6 6. Bf4 e6 7. e3 Nh5 8. Be5 f6 9. Bg3 Nxg3 10. hxg3 Bd7 11. Bd3 f5 12. g4 g6 13. Nh4 Bg7 14. gxf5 exf5 15. Nxd5 Qa5+ 16. Nc3 O-O-O 17. a3 f4 18. Nf3 Rde8 19. b4 Qd8 20. Rc1 Kb8 21. d5 Ne5 22. Nxe5 Rxe5 23. e4 Qg5 24. Kf1 h5 25. Bb5 Bxb5+ 26. Nxb5 Rxe4 27. Qc2 Re7 28. Qc5 b6 29. Qd6+ Ka8 30. Qc6+ Kb8 31. Nc7 Rxc7 32. Qxc7+ Ka8 33. Qc6+ Kb8 34. Qd6+ Ka8 35. Qd7 a6 36. Rc7 |
| ECO A15 in 1990 play it! weyerstrass defeats black's baumgartner in 49 moves | 1. c4 Nf6 2. g3 c5 3. Bg2 d5 4. cxd5 Nxd5 5. Nc3 Nc7 6. Nf3 Nc6 7. Qa4 Qd7 8. O-O e5 9. e3 Be7 10. Rd1 Rb8 11. d4 b5 12. Qc2 exd4 13. exd4 cxd4 14. Bf4 Bb7 15. Nxb5 Nxb5 16. Bxb8 Nxb8 17. Ne5 Qc8 18. Qb3 O-O 19. Qxb5 Bxg2 20. Kxg2 a6 21. Qb3 Bf6 22. Rac1 Qe6 23. Qxe6 fxe6 24. f4 Rd8 25. Rc4 |
| ECO A15 in 1990 play it! weyerstrass defeats black's verbeek h in 33 moves | 1. c4 Nf6 2. g3 g6 3. Bg2 Bg7 4. Nc3 d6 5. e4 c5 6. Nge2 Nc6 7. O-O O-O 8. d3 Bd7 9. h3 a6 10. Be3 Rb8 11. a4 b6 12. Kh2 Qc7 13. b3 Na7 14. d4 b5 15. axb5 axb5 16. dxc5 dxc5 17. e5 |
| ECO A20 in 1985 play it! weyerstrass defeats black's de brieder in 33 moves | 1. c4 e5 2. g3 Nf6 3. Bg2 Nc6 4. Nc3 a6 5. e3 Bb4 6. Nd5 Nxd5 7. cxd5 Ne7 8. Nf3 Bd6 9. d4 e4 10. Ne5 Nxd5 11. Qb3 c6 12. Bxe4 f6 13. Nc4 Bc7 14. Bd2 d6 15. Qc2 b5 16. Na3 g6 17. Qxc6+ |
| ECO A20 in 1984 play it! weyerstrass defeats black's ahlers in 83 moves | 1. c4 e5 2. g3 Nf6 3. Bg2 Be7 4. Nc3 O-O 5. e4 d6 6. Nge2 Be6 7. d3 c6 8. O-O Na6 9. h3 Qd7 10. Kh2 d5 11. exd5 cxd5 12. d4 exd4 13. Nxd4 Rad8 14. cxd5 Nxd5 15. Nxe6 fxe6 16. Ne4 Nab4 17. a3 Nc6 18. b3 Qe8 19. Qg4 Rf5 20. Bb2 Qf7 21. Rae1 e5 22. b4 Nb6 23. Rc1 h5 24. Qe2 Nd4 25. Bxd4 exd4 26. Rc7 Rd7 27. Rfc1 Bf8 28. Rxd7 Qxd7 29. Qd3 Rd5 30. Nc5 Qf5 31. Bxd5+ Qxd5 32. Qb3 Qxb3 33. Nxb3 d3 34. Kg2 Be7 35. f4 Bf6 36. Rd1 Bb2 37. Rxd3 Bxa3 38. b5 Nc4 39. Rd7 Nd6 40. Nd4 a5 41. bxa6 bxa6 42. Ra7 |
| ECO A13 in 1988 play it! weyerstrass defeats black's groetz harald in 45 moves | 1. c4 e6 2. g3 c5 3. Bg2 Nc6 4. Nf3 Nf6 5. O-O Be7 6. Nc3 O-O 7. d4 cxd4 8. Nxd4 Qb6 9. Nc2 a6 10. b3 d6 11. e4 Nd7 12. Bb2 Qc7 13. Rc1 Rb8 14. Ne3 Qd8 15. Ba3 Nf6 16. Re1 Ne8 17. Bb2 f6 18. f4 Nc7 19. Qd2 Qd7 20. Bh3 Rd8 21. Ncd5 Bf8 22. Bxf6 Nxd5 23. exd5 |
| ECO A20 in 1987 play it! weyerstrass defeats black's bronts in 53 moves | 1. c4 e5 2. g3 Nf6 3. Bg2 Bc5 4. Nc3 c6 5. e4 d6 6. Nge2 Be6 7. b3 Ng4 8. O-O Qb6 9. d4 Bxd4 10. Nxd4 exd4 11. Na4 Qa5 12. Qxd4 Qe5 13. Rd1 O-O 14. h3 Qxd4 15. Rxd4 Ne5 16. f4 c5 17. Rxd6 Nec6 18. Nxc5 Rd8 19. Nxb7 Rxd6 20. Nxd6 Na6 21. e5 Nab4 22. a3 Nc2 23. Bxc6 Nxa1 24. Bxa8 Nxb3 25. Be3 a5 26. c5 Kf8 27. c6 |
| ECO A10 in 1978 play it! weyerstrass defeats black's van der linden in 49 moves | 1. c4 f5 2. g3 Nf6 3. Bg2 g6 4. Nc3 Bg7 5. d3 c6 6. e4 d6 7. Nge2 e5 8. Rb1 Be6 9. Bg5 Nbd7 10. O-O h6 11. Bxf6 Nxf6 12. exf5 gxf5 13. b4 O-O 14. b5 d5 15. bxc6 bxc6 16. cxd5 Nxd5 17. Qa4 Qd7 18. Rfc1 f4 19. Bxd5 Bxd5 20. Nxd5 Qxd5 21. Qxc6 Qxa2 22. Rb7 fxg3 23. Qg6 gxf2+ 24. Kf1 Rf7 25. Nc3 |
| ECO A10 in 1987 play it! weyerstrass defeats black's kerkmeester in 61 moves | 1. c4 g6 2. g3 Bg7 3. Bg2 d6 4. Nc3 c6 5. e4 Nd7 6. Nge2 Nh6 7. d3 f6 8. O-O Nf7 9. Be3 Nf8 10. Qd2 Bd7 11. h3 Qc8 12. Kh2 h5 13. f4 Bh6 14. d4 g5 15. Rae1 h4 16. g4 gxf4 17. Nxf4 Bxf4+ 18. Bxf4 Ng6 19. Kh1 Nxf4 20. Qxf4 Qc7 21. c5 O-O-O 22. cxd6 Nxd6 23. e5 Nc4 24. exf6 Qxf4 25. Rxf4 exf6 26. b3 Na3 27. d5 c5 28. Ne4 Nc2 29. Rc1 Nb4 30. Nxc5 Nxa2 31. Rc2 |
| ECO A17 in 1975 play it! weyerstrass defeats black's aartzen in 107 moves | 1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. g3 Be7 5. Bg2 O-O 6. d4 d5 7. cxd5 cxd4 8. Nxd4 Nxd5 9. Nxd5 exd5 10. O-O Nc6 11. Be3 Nxd4 12. Bxd4 Be6 13. Qd2 Rc8 14. Rfd1 Bc5 15. Rac1 Bxd4 16. Qxd4 Rxc1 17. Rxc1 Qa5 18. a3 Qb5 19. e3 Qe2 20. Bf1 Qf3 21. Qxa7 Bf5 22. Bg2 Qe2 23. Qd4 Be4 24. Bxe4 dxe4 25. b4 Re8 26. Qxe4 Rd8 27. Qd5 Rf8 28. Qxb7 Qb2 29. Rc8 Qxa3 30. Qb8 Qc1+ 31. Rxc1 Rxb8 32. Kg2 Kf8 33. Rb1 Rb5 34. Kf3 Ke7 35. Ke4 Ke6 36. Kd4 Kd6 37. Kc4 Kc6 38. Rd1 Rf5 39. f4 g5 40. e4 Rf6 41. e5 Re6 42. b5+ Kc7 43. Kc5 gxf4 44. gxf4 Rh6 45. Rd2 Rh3 46. b6+ Kc8 47. Kd6 Rf3 48. Rc2+ Kb8 49. Rc4 Rh3 50. Ke7 Rxh2 51. Kxf7 Rb2 52. e6 Rxb6 53. e7 Rb7 54. Rb4 |
| ECO A20 in 1987 play it! weyerstrass defeats black's lam in 53 moves | 1. c4 e5 2. g3 Nf6 3. Bg2 c5 4. Nc3 Nc6 5. d3 b6 6. Nf3 Bd6 7. Bg5 h6 8. Ne4 Be7 9. Bxf6 Bxf6 10. O-O O-O 11. Ne1 g5 12. Nc2 Bg7 13. Ne3 d6 14. Nxc5 dxc5 15. Bxc6 Rb8 16. Bg2 f5 17. Rb1 f4 18. Nd5 Bb7 19. Qa4 g4 20. b4 h5 21. Be4 h4 22. bxc5 Bc8 23. Qc6 hxg3 24. fxg3 fxg3 25. Qg6 Rxf1+ 26. Rxf1 gxh2+ 27. Kh1 |
| ECO A22 in 1976 play it! weyerstrass defeats black's lamme in 63 moves | 1. c4 e5 2. Nc3 Nf6 3. g3 Nc6 4. Bg2 g6 5. d3 Bg7 6. e4 d6 7. Nge2 O-O 8. Rb1 Ne7 9. b4 Nh5 10. Qb3 Kh8 11. O-O f5 12. f4 Nf6 13. Rd1 c6 14. fxe5 dxe5 15. d4 Qc7 16. d5 Rd8 17. c5 cxd5 18. exd5 Qd7 19. b5 e4 20. d6 Neg8 21. Ba3 Qe8 22. Nd4 Ng4 23. Nd5 Bxd4+ 24. Rxd4 Be6 25. Qc3 Qf7 26. Rxe4+ N8f6 27. Rxe6 Qxe6 28. Re1 Qf7 29. Re7 Qf8 30. Bb2 Kg8 31. Nxf6+ Nxf6 32. Bd5+ |
| ECO A10 in 1991 play it! weyerstrass defeats black's van veldhoven in 81 moves | 1. c4 g6 2. Nc3 Bg7 3. e4 e5 4. Nge2 Nc6 5. d3 d6 6. h3 Nge7 7. g3 Nd4 8. Bg2 Nec6 9. O-O Be6 10. Rb1 Qd7 11. Kh2 O-O 12. b4 Nxe2 13. Nxe2 Rab8 14. b5 Nd4 15. Nxd4 exd4 16. f4 f5 17. exf5 Rxf5 18. Re1 Rff8 19. Rxe6 Kh8 20. Re4 d5 21. cxd5 Qxd5 22. Qe2 Qd7 23. a4 Rfe8 24. Bb2 Rxe4 25. dxe4 Qe6 26. Qd3 Rd8 27. e5 c5 28. bxc6 bxc6 29. Rc1 Qa2 30. Ba3 Rc8 31. Rc4 c5 32. Rxc5 Rxc5 33. Bxc5 Qxa4 34. Qxd4 Qxd4 35. Bxd4 Kg8 36. Bxa7 Kf7 37. Bd5+ Ke7 38. Bc5+ Kd7 39. e6+ Kd8 40. e7+ Kd7 41. Bb3 |
| ECO A10 in 1974 play it! weyerstrass defeats black's cornelisse a in 83 moves | 1. c4 g6 2. g3 Bg7 3. Bg2 Nf6 4. d4 O-O 5. Nc3 e6 6. Nf3 d5 7. b3 Nbd7 8. O-O Re8 9. Bb2 Nh5 10. cxd5 Nb6 11. dxe6 Bxe6 12. Qd2 c6 13. Rad1 Qc7 14. e4 Rad8 15. Rfe1 Bg4 16. Qc2 Qd7 17. d5 Nf6 18. dxc6 Qxc6 19. Rxd8 Rxd8 20. Ne5 Qc7 21. Nxg4 Nxg4 22. Rc1 Bd4 23. Nb5 Bxf2+ 24. Qxf2 Qxc1+ 25. Bxc1 Nxf2 26. Kxf2 a6 27. Nc3 Nd7 28. Ke2 Ne5 29. Nd5 Kg7 30. Bb2 f6 31. h3 Re8 32. Ke3 Rc8 33. Bc3 Kf7 34. Bf1 Rc5 35. Be2 Rc8 36. Kd2 Rc5 37. Bd4 Rc8 38. Nb6 Rd8 39. Ke3 Rd6 40. Nc4 Nxc4+ 41. Bxc4+ Ke8 42. a4 |