| ECO A20 in 1982 play it! weyerstrass defeats black's tonn in 65 moves | 1. c4 e5 2. g3 Nf6 3. Bg2 c6 4. d4 exd4 5. Qxd4 d5 6. Nf3 Be7 7. cxd5 cxd5 8. O-O Nc6 9. Qa4 O-O 10. Be3 a5 11. Nc3 Be6 12. Rfd1 Nb4 13. Rd2 Bd7 14. Qd1 Bc6 15. Rc1 Ng4 16. Bd4 f6 17. Ne1 Qd7 18. a3 b5 19. axb4 axb4 20. Nb1 Ra6 21. Nd3 Nh6 22. Bc5 Nf5 23. Bxe7 Qxe7 24. Rxc6 Ne3 25. fxe3 Qxe3+ 26. Kh1 Rxc6 27. Bxd5+ Re6 28. Nf4 g5 29. Bxe6+ Kh8 30. Rd8 Qe4+ 31. Kg1 Qe3+ 32. Kf1 gxf4 33. Rxf8+ |
| ECO A13 in 1990 play it! weyerstrass defeats black's velker in 51 moves | 1. c4 e6 2. g3 f5 3. Bg2 Nf6 4. d3 Bb4+ 5. Bd2 Qe7 6. e4 fxe4 7. dxe4 Bxd2+ 8. Qxd2 Nc6 9. Nc3 O-O 10. Nge2 Ng4 11. O-O Nge5 12. b3 Nf3+ 13. Bxf3 Rxf3 14. Kg2 Ne5 15. Ng1 Rf7 16. f4 Ng4 17. h3 Nh6 18. Nf3 d6 19. Rad1 b6 20. e5 Bb7 21. exd6 cxd6 22. Qxd6 Qxd6 23. Rxd6 Nf5 24. Rd3 Raf8 25. Kh2 Ne7 26. Ne5 |
| ECO A36 in 1980 play it! weyerstrass defeats black's sargon compute in 115 moves | 1. c4 c5 2. Nc3 Nc6 3. g3 Nf6 4. Bg2 e6 5. Nf3 Be7 6. O-O O-O 7. d4 d5 8. cxd5 Nxd5 9. Nxd5 Qxd5 10. Ne5 Qxd4 11. Nxc6 bxc6 12. Qxd4 cxd4 13. Bxc6 Rb8 14. b3 Rb6 15. Bf3 e5 16. Rd1 Bf5 17. Bb2 Bg5 18. h4 Bh6 19. g4 Bc2 20. g5 Bxd1 21. Rxd1 Rg6 22. Bh5 Ra6 23. gxh6 Rxh6 24. Bf3 Rxh4 25. e3 Rd8 26. exd4 exd4 27. Kg2 d3 28. Kg3 Rh6 29. Be4 d2 30. Bc3 Rhd6 31. Kf4 g6 32. f3 f5 33. Bb7 Rb6 34. Ba5 Rd4+ 35. Ke3 Rbd6 36. Rxd2 f4+ 37. Ke2 Rxd2+ 38. Bxd2 g5 39. Be4 h5 40. Bb4 Ra6 41. a4 Kf7 42. Bc5 h4 43. Kf2 Ra5 44. Bb4 Ra6 45. Kg2 Ke6 46. Kh3 Rb6 47. Bc5 Rxb3 48. Bxa7 Ra3 49. Bc6 Kd6 50. Be4 Rxa4 51. Bb8+ Ke6 52. Kg4 Kf6 53. Bc7 Rd4 54. Ba5 Rc4 55. Bd8+ Kg7 56. Bxg5 Kf8 57. Bxh4 Ke8 58. Kxf4 |
| ECO A10 in 1974 play it! weyerstrass defeats black's hilhorst in 71 moves | 1. c4 f5 2. g3 Nf6 3. Bg2 g6 4. Nc3 Bg7 5. d3 O-O 6. e4 fxe4 7. dxe4 d6 8. Nge2 e5 9. O-O Be6 10. Nd5 Nc6 11. h3 Qd7 12. Kh2 Rf7 13. Be3 a6 14. Nec3 Rb8 15. Qd3 Kh8 16. a3 Ne7 17. Rfd1 Rff8 18. Nxf6 Bxf6 19. Nd5 Bg7 20. Rac1 Rbd8 21. Rd2 Nc6 22. c5 dxc5 23. Bxc5 Rfe8 24. Qc3 Qf7 25. Qb3 Rb8 26. Qc2 Rbd8 27. Rd3 Bh6 28. Rf3 Qg7 29. Rd1 b6 30. Bxb6 cxb6 31. Qxc6 Bxd5 32. Rxd5 Rb8 33. Rd7 Qg8 34. Rff7 Rbc8 35. Qf6+ Bg7 36. Rxg7 |
| ECO A26 in 1979 play it! weyerstrass defeats black's den hamer in 83 moves | 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. Rb1 Be6 7. e3 Qd7 8. b4 Nge7 9. Nd5 f5 10. Ne2 O-O 11. O-O Nd8 12. a4 Rb8 13. Qc2 Nf7 14. Bd2 g5 15. f4 c6 16. Nxe7+ Qxe7 17. b5 c5 18. Nc3 g4 19. Nd5 Qd8 20. Bc3 Nh8 21. Qb2 Ng6 22. b6 a6 23. Nc7 Bd7 24. a5 Qe7 25. Bd5+ Kh8 26. Rbe1 Bc8 27. Qg2 Bf6 28. Rf2 Qg7 29. Rfe2 Ne7 30. Bb2 h5 31. h3 h4 32. Qh1 hxg3 33. hxg4+ Qh7 34. g5 Qxh1+ 35. Kxh1 Bg7 36. Kg2 Nxd5 37. Nxd5 Re8 38. Kxg3 Re6 39. Rh1+ Kg8 40. Reh2 Kf7 41. Rh7 Bd7 42. R1h6 |
| ECO A36 in 1976 play it! weyerstrass defeats black's ter steeg in 61 moves | 1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. e4 Bd7 7. Nge2 e6 8. O-O a6 9. Rb1 Rb8 10. a3 Nge7 11. b4 b6 12. Be3 O-O 13. Qd2 Re8 14. f4 Qc8 15. g4 f5 16. h3 Rf8 17. Kh2 Qc7 18. b5 Nd4 19. a4 Nxe2 20. Nxe2 Ra8 21. exf5 Ra7 22. fxe6 Bxe6 23. Kh1 axb5 24. axb5 Qd7 25. Ng3 d5 26. Qe2 dxc4 27. dxc4 Ra4 28. Rbc1 Ra3 29. Rfd1 Qc8 30. Rd6 Rb3 31. Kh2 |
| ECO A10 in 1986 play it! weyerstrass defeats black's masmeijer in 74 moves | 1. c4 b6 2. Nc3 Bb7 3. e4 e6 4. g3 f5 5. d3 Nf6 6. Bg2 Bb4 7. Ne2 O-O 8. O-O Qc8 9. h3 d6 10. Be3 fxe4 11. dxe4 Bc5 12. Bxc5 bxc5 13. f4 Nc6 14. Qd2 e5 15. Nd5 Nxd5 16. exd5 Nd4 17. Rae1 Nxe2+ 18. Rxe2 exf4 19. Rxf4 Qd7 20. Rfe4 Rae8 21. Qe1 Rxe4 22. Rxe4 Qa4 23. Kh2 Qxa2 24. Re8 g6 25. Qe6+ Kg7 26. Rxf8 Kxf8 27. Qf6+ Ke8 28. Qh8+ Kd7 29. Qxh7+ Kd8 30. Qg8+ Kd7 31. Qf7+ Kd8 32. Qf6+ Kc8 33. Qh8+ Kd7 34. h4 Qa4 35. Bh3+ Ke7 36. Qg7+ Kd8 37. Qf6+ Ke8 |
| ECO A16 in 1976 play it! weyerstrass defeats black's hajenius in 71 moves | 1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 O-O 5. e4 d6 6. Nge2 c6 7. O-O a5 8. d3 e5 9. Rb1 Na6 10. a3 Bd7 11. h3 Qc8 12. Kh2 Re8 13. Be3 Nh5 14. f4 exf4 15. Nxf4 Nxf4 16. Bxf4 Nc7 17. Ne2 f5 18. b4 axb4 19. axb4 Ne6 20. h4 Nxf4 21. Nxf4 Ra2 22. Qf3 Qa8 23. Rf2 Rd8 24. c5 dxc5 25. bxc5 Bd4 26. Rxa2 Qxa2 27. Rxb7 Bxc5 28. Kh1 Qa1+ 29. Qf1 Qd4 30. Kh2 fxe4 31. dxe4 Rf8 32. Rxd7 Qxd7 33. Qc4+ Qf7 34. Qxc5 Qf6 35. e5 Qf5 36. Bh3 |
| ECO A10 in 1977 play it! weyerstrass defeats black's doevelaar in 65 moves | 1. c4 g6 2. Nc3 Bg7 3. g3 d6 4. Bg2 Nc6 5. d3 e5 6. Rb1 a5 7. a3 Nge7 8. b4 axb4 9. axb4 O-O 10. e3 f5 11. Nge2 g5 12. h4 f4 13. Be4 f3 14. hxg5 fxe2 15. Bxh7+ Kf7 16. Qxe2 Bf5 17. Bxf5 Nxf5 18. Qh5+ Ke6 19. Qg6+ Kd7 20. Rh7 Nce7 21. Rxg7 Nxg7 22. Qxg7 Rg8 23. Qf7 Rf8 24. Qh5 c6 25. Bd2 Rh8 26. Qf3 Qg8 27. Ne4 Qg6 28. b5 Kc7 29. bxc6 bxc6 30. Bc3 Raf8 31. Qg2 Qf5 32. Rb7+ Kd8 33. Ba5+ |
| ECO A20 in 1987 play it! weyerstrass defeats black's hilhorst in 75 moves | 1. c4 e5 2. g3 Nc6 3. Bg2 g6 4. Nc3 Bg7 5. d3 d6 6. e4 Nge7 7. Nge2 a6 8. O-O Rb8 9. a4 O-O 10. Rb1 a5 11. Bg5 f6 12. Be3 f5 13. Qd2 Be6 14. Nd5 Qd7 15. Bg5 b6 16. b3 Rbe8 17. Rbd1 Nc8 18. Bh6 Nd4 19. Nxd4 exd4 20. Bxg7 Qxg7 21. Nf4 Bd7 22. exf5 Rxf5 23. Rfe1 Rfe5 24. h4 Ne7 25. Rxe5 dxe5 26. Nd5 Nxd5 27. Bxd5+ Be6 28. Bg2 c5 29. Re1 Bf5 30. Qe2 Qd7 31. Bd5+ Kf8 32. Qf3 Kg7 33. Bc6 Qe6 34. Bxe8 Qxe8 35. g4 Bd7 36. Qe4 Kh6 37. Kh2 Qd8 38. Kg3 |
| ECO A22 in 1977 play it! weyerstrass defeats black's spierings m in 73 moves | 1. c4 e5 2. Nc3 Nf6 3. g3 Bb4 4. Bg2 O-O 5. e4 d6 6. Nge2 Be6 7. Nd5 a5 8. O-O c6 9. Ne3 d5 10. exd5 cxd5 11. cxd5 Nxd5 12. d4 exd4 13. Nxd4 Nxe3 14. Bxe3 Bc4 15. Qg4 Bxf1 16. Nf5 Qf6 17. Bxb7 Ra6 18. Rxf1 Re6 19. a3 Be7 20. Bd5 Re5 21. Nh6+ Kh8 22. Bd4 Qxh6 23. Bxe5 Bd6 24. Bc3 f5 25. Qf3 f4 26. g4 Nd7 27. Re1 Qg5 28. Re6 Bc7 29. b4 Rc8 30. Qe2 f3 31. Bxf3 Qc1+ 32. Qe1 Qf4 33. Re8+ Rxe8 34. Qxe8+ Nf8 35. Qe7 Qxh2+ 36. Kf1 Qh3+ 37. Ke2 |
| ECO A10 in 1990 play it! weyerstrass defeats black's vedder in 59 moves | 1. c4 d6 2. Nc3 Nf6 3. e4 g6 4. g3 Nbd7 5. Bg2 e5 6. Nge2 c5 7. d3 a6 8. O-O Bg7 9. f4 O-O 10. f5 Rb8 11. a4 b6 12. h3 Bb7 13. g4 Bc6 14. Ng3 b5 15. g5 Ne8 16. f6 Nexf6 17. gxf6 Nxf6 18. axb5 axb5 19. cxb5 Bd7 20. Bg5 h6 21. Be3 Qc8 22. Kh2 Nh7 23. Qd2 g5 24. Nf5 Bxf5 25. Rxf5 Qe6 26. Bf3 Rb7 27. Ra6 Rc8 28. Bg4 Qg6 29. Qd1 Nf6 30. Rxf6 |
| ECO A13 in 1984 play it! weyerstrass defeats black's abrahamse in 51 moves | 1. c4 e6 2. g3 d5 3. Bg2 c5 4. Nf3 Nc6 5. O-O Nf6 6. cxd5 exd5 7. d4 Be7 8. Nc3 O-O 9. b3 Ne4 10. Bb2 Bf6 11. Na4 cxd4 12. Nxd4 Bxd4 13. Bxd4 Be6 14. Rc1 Rc8 15. e3 b6 16. Bb2 Qe7 17. Nc3 Rfd8 18. Nb5 Nf6 19. Qd2 a6 20. Nd4 Ne5 21. f4 Neg4 22. Nc6 Rxc6 23. Rxc6 Ne4 24. Qd4 f6 25. Bxe4 dxe4 26. Rxe6 |
| ECO A21 in 1976 play it! weyerstrass defeats black's wiegers in 91 moves | 1. c4 e5 2. Nc3 f5 3. g3 Nf6 4. Bg2 c6 5. d4 e4 6. Nh3 d5 7. cxd5 Nxd5 8. O-O Be6 9. Bg5 Be7 10. Bxe7 Qxe7 11. Nxd5 Bxd5 12. Nf4 Bf7 13. e3 O-O 14. h4 Nd7 15. Qd2 Nf6 16. Rfc1 Nd5 17. Nxd5 Bxd5 18. Rc5 g5 19. hxg5 Qxg5 20. Bf1 h5 21. Bc4 Bxc4 22. Rxc4 h4 23. Kg2 Qg4 24. Qd1 hxg3 25. fxg3 Rf7 26. Qxg4+ fxg4 27. Rc5 Raf8 28. Rg5+ Rg7 29. Re5 Rf3 30. Rxe4 Rgf7 31. Rxg4+ Kf8 32. Rf4 Rxe3 33. Rxf7+ Kxf7 34. Rf1+ Ke6 35. Rf3 Re2+ 36. Rf2 Re4 37. Rd2 Kd5 38. Kf3 a5 39. g4 b5 40. g5 b4 41. g6 Re7 42. Kf4 Re1 43. Rg2 Re8 44. g7 Rg8 45. Ke3 a4 46. Rg6 |
| ECO A22 in 1980 play it! weyerstrass defeats black's de vries r in 73 moves | 1. c4 e5 2. Nc3 Nf6 3. g3 Bb4 4. Bg2 O-O 5. e4 d6 6. Nge2 Nc6 7. O-O Be6 8. Nd5 Bxd5 9. cxd5 Ne7 10. d4 h6 11. Qb3 Ba5 12. Qxb7 Bb6 13. Qa6 c6 14. dxe5 dxe5 15. dxc6 Nxc6 16. Be3 Qc8 17. Qxc8 Rfxc8 18. Bxb6 axb6 19. a3 Rd8 20. Rfd1 Rac8 21. Rac1 Na7 22. Nc3 Rd4 23. Kf1 Rcd8 24. Nd5 Rxd1+ 25. Rxd1 Nxd5 26. exd5 Nc6 27. Re1 Na5 28. Rxe5 Nc4 29. Re2 Kf8 30. Ke1 f6 31. Kd1 Kf7 32. h4 Ne5 33. Rc2 g5 34. Rc7+ Kg6 35. hxg5 hxg5 36. Kd2 b5 37. Kc3 |
| ECO A15 in 1990 play it! weyerstrass defeats black's van tuyll in 113 moves | 1. c4 Nf6 2. g3 g6 3. Bg2 Bg7 4. Nc3 O-O 5. e4 d6 6. Nge2 e5 7. O-O Nc6 8. f4 Bg4 9. h3 Bxe2 10. Nxe2 Re8 11. d3 Rb8 12. Be3 a6 13. f5 Nh5 14. Qd2 Nd4 15. Bxd4 exd4 16. g4 Nf6 17. g5 Nd7 18. f6 Nxf6 19. gxf6 Bxf6 20. Qf4 Re6 21. Qf3 Kg7 22. Nf4 Re5 23. Nd5 Re6 24. c5 c6 25. Nxf6 Rxf6 26. Qxf6+ Qxf6 27. Rxf6 Kxf6 28. Rf1+ Ke6 29. cxd6 Rf8 30. d7 f6 31. Rc1 Rd8 32. h4 Kxd7 33. b4 Kd6 34. Kf2 Ke5 35. Kg3 Rd7 36. Bh3 Rd8 37. Rc4 Rb8 38. a4 Rd8 39. Kf3 Rg8 40. Rc5+ Kd6 41. Kf4 b6 42. e5+ Kc7 43. Rc4 g5+ 44. hxg5 fxe5+ 45. Kxe5 Rxg5+ 46. Kxd4 Kd6 47. Kc3 c5 48. bxc5+ bxc5 49. Rg4 Rh5 50. Bg2 Kc7 51. Be4 Kb6 52. Rg7 h6 53. Rg6+ Ka5 54. Bb7 Kxa4 55. Rxa6+ Kb5 56. Rg6 Rh4 57. Ba6+ |
| ECO A23 in 1977 play it! weyerstrass defeats black's hoekstra in 83 moves | 1. c4 e5 2. Nc3 Nf6 3. g3 c6 4. d4 exd4 5. Qxd4 b6 6. Bg2 Be7 7. e4 c5 8. Qd2 Bb7 9. Nge2 O-O 10. O-O d6 11. e5 Bxg2 12. exf6 Bxf1 13. fxe7 Qxe7 14. Kxf1 Nc6 15. b3 Rfe8 16. Bb2 Ne5 17. Kg2 Qb7+ 18. Nd5 Re6 19. Nef4 Rh6 20. h3 Re8 21. Re1 f6 22. Nd3 Qf7 23. f4 Nxd3 24. Rxe8+ Qxe8 25. Qxd3 f5 26. Ne3 Qe4+ 27. Qxe4 fxe4 28. Bxg7 Rg6 29. Bc3 Kf7 30. g4 a6 31. f5 Rg8 32. Kg3 b5 33. Kf4 Re8 34. g5 bxc4 35. bxc4 Re7 36. h4 Re8 37. h5 Rg8 38. g6+ hxg6 39. hxg6+ Kf8 40. Kxe4 Ke8 41. Nd5 Kf8 42. a4 |
| ECO A02 in 1975 play it! weyerstrass defeats black's de jong r in 61 moves | 1. f4 g6 2. Nf3 b6 3. e4 c5 4. Nc3 Bg7 5. d4 e6 6. Be2 Ne7 7. O-O O-O 8. Be3 cxd4 9. Nxd4 Bb7 10. f5 Nec6 11. Qd2 Na6 12. Rad1 Nc7 13. Ndb5 Ne5 14. Nxc7 Qxc7 15. f6 Bh8 16. Qd6 Qxd6 17. Rxd6 Rfd8 18. Bd4 Nc6 19. e5 Nxd4 20. Rxd4 Rac8 21. Bf3 Bxf3 22. gxf3 Rc5 23. f4 Bxf6 24. exf6 Rf5 25. Ne4 d5 26. Ng3 Rxf6 27. c4 Kf8 28. Ne4 Rf5 29. Nc3 Ke7 30. Rfd1 g5 31. fxg5 |
| ECO A00 in 1990 play it! weyerstrass defeats black's jonkheer in 55 moves | 1. g3 c5 2. c4 Nc6 3. Bg2 g6 4. Nc3 Bg7 5. e4 e6 6. Nge2 Nge7 7. O-O O-O 8. d3 f5 9. Rb1 fxe4 10. dxe4 Nd4 11. f4 e5 12. fxe5 Bxe5 13. Bg5 Qe8 14. Qd2 a6 15. Rxf8+ Qxf8 16. Rf1 Qe8 17. Bh6 Nxe2+ 18. Nxe2 Bg7 19. Bxg7 Kxg7 20. Qd6 Ng8 21. Qxc5 Qe7 22. Qd4+ Nf6 23. Nc3 d6 24. Nd5 Qe5 25. Qxe5 dxe5 26. Rxf6 b5 27. Rc6 Ra7 28. Rxc8 |
| ECO A00 in 1990 play it! weyerstrass defeats black's bronts in 29 moves | 1. g3 d5 2. c4 e6 3. Bg2 Nf6 4. Nf3 Nc6 5. b3 g6 6. Bb2 Bg7 7. O-O O-O 8. d3 Ne7 9. Qc2 c5 10. cxd5 Qxd5 11. Ne5 Qd6 12. Nd2 Ned5 13. a3 b6 14. e4 Ne7 15. Nec4 |