| ECO A01 in 1978 play it! weyerstrass defeats black's anema in 36 moves | 1. b3 d5 2. Bb2 c5 3. e3 Nc6 4. Bb5 a6 5. Bxc6+ bxc6 6. Nf3 Bg4 7. h3 Bh5 8. g4 Bg6 9. d3 f6 10. Nh4 Bf7 11. f4 e5 12. fxe5 fxe5 13. Nf3 d4 14. Qe2 Bd5 15. exd4 Bxf3 16. Qxf3 exd4 17. Qxc6+ Kf7 18. O-O+ Nf6 |
| ECO A01 in 1978 play it! weyerstrass defeats black's van keekem in 33 moves | 1. b3 e5 2. Bb2 Nc6 3. e3 b6 4. Nf3 d6 5. d4 exd4 6. Nxd4 Nxd4 7. Qxd4 Bb7 8. Bb5+ c6 9. Be2 Nf6 10. c4 c5 11. Qh4 Be7 12. Qg3 Rg8 13. Nc3 Qd7 14. Bf3 O-O-O 15. Rd1 Ne8 16. O-O Bf6 17. Bg4 |
| ECO A01 in 1988 play it! weyerstrass defeats black's jonkheer in 85 moves | 1. b3 e5 2. Bb2 Nc6 3. e3 a6 4. c4 Bc5 5. Nf3 d6 6. Be2 Nf6 7. O-O O-O 8. d4 exd4 9. exd4 Bb6 10. a3 Re8 11. b4 Bf5 12. Nbd2 Ne4 13. Re1 Qf6 14. Nf1 Rad8 15. Ne3 Ne7 16. Qb3 c6 17. c5 Bc7 18. d5 Qg6 19. dxc6 bxc6 20. cxd6 Bxd6 21. Nxf5 Nxf5 22. Bxa6 Bf4 23. Rad1 Nxf2 24. Kxf2 Bg3+ 25. hxg3 Qxg3+ 26. Kg1 Rxe1+ 27. Nxe1 Rxd1 28. Qxg3 Nxg3 29. Kf2 Rd2+ 30. Kxg3 Rxb2 31. Bc4 Rb1 32. Nc2 Rb2 33. Nd4 Rb1 34. Nxc6 Rc1 35. Bd5 Rc3+ 36. Kf4 Rxa3 37. b5 Ra1 38. Nd4 Rb1 39. Nb3 Re1 40. b6 g5+ 41. Kf5 Re8 42. Nc5 Kg7 43. b7 |
| ECO B50 in 1970 play it! weyerstrass defeats black's zijp in 51 moves | 1. e4 c5 2. Nf3 d6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 g6 6. Bb5 Bd7 7. Nxc6 bxc6 8. Bc4 Bg7 9. O-O Nf6 10. Be3 O-O 11. f4 Ng4 12. Bd2 Qc8 13. Kh1 Kh8 14. h3 Nf6 15. e5 dxe5 16. fxe5 Ne8 17. Rxf7 Rxf7 18. Bxf7 Bxe5 19. Qe2 Qc7 20. Re1 Bg3 21. Qxe7 Ng7 22. Re3 Qf4 23. Rxg3 Qxd2 24. Rd3 Qf4 25. Rxd7 Nh5 26. Bxg6 |
| ECO C51 in 1980 play it! weyerstrass defeats black's sargon compute by checkmate in 69 moves | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Be7 6. d4 exd4 7. Qb3 Kf8 8. Bxf7 Nf6 9. e5 Na5 10. Qa4 c6 11. exf6 Bxf6 12. Bb3 Qe7+ 13. Kd1 dxc3 14. Ba3 c5 15. Qxa5 b6 16. Qa4 c2+ 17. Kxc2 Bxa1 18. Nc3 Bxc3 19. Kxc3 Qf6+ 20. Kc2 Qg6+ 21. Kc1 Qh6+ 22. Kb1 Qg6+ 23. Ka1 a5 24. Re1 d6 25. Nh4 Qf6+ 26. Bb2 b5 27. Qxb5 Ba6 28. Qd7 Rd8 29. Re8+ Rxe8 30. Bxf6 Re1+ 31. Kb2 Rb1+ 32. Kxb1 Bd3+ 33. Kb2 c4 34. Qxg7+ Ke8 35. Qe7# |
| ECO C51 in 1986 play it! weyerstrass defeats black's sargon compute by checkmate in 71 moves | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Be7 6. d4 exd4 7. Qb3 Kf8 8. Bxf7 Nf6 9. e5 Ng4 10. O-O dxc3 11. Bh5 Ngxe5 12. Nxe5 Nxe5 13. f4 Ng6 14. f5 Bc5+ 15. Kh1 Ne5 16. f6 d5 17. Bg5 g6 18. Be2 d4 19. Bh6+ Ke8 20. f7+ Kd7 21. Nxc3 dxc3 22. Rad1+ Bd6 23. Qb5+ Ke6 24. Qd5+ Kd7 25. Qxe5 a6 26. Bg4+ Kc6 27. Qd5+ Kb6 28. f8=Q Rxf8 29. Rxf8 Qxf8 30. Bxc8 Qxc8 31. Be3+ c5 32. Qxd6+ Qc6 33. Bxc5+ Kb5 34. Rb1+ Ka5 35. Bb6+ Ka4 36. Qb4# |
| ECO C51 in 1986 play it! weyerstrass defeats black's sargon compute in 97 moves | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Be7 6. Qb3 Nh6 7. d4 Na5 8. Qb5 Nxc4 9. Bxh6 gxh6 10. Qxc4 exd4 11. cxd4 c6 12. Nc3 O-O 13. O-O b5 14. Qd3 Bb7 15. Ne5 Bg5 16. f4 d6 17. Ng4 h5 18. Ne3 Bf6 19. Nf5 b4 20. Ne2 c5 21. Rf3 Re8 22. Rg3+ Kf8 23. e5 h4 24. Nh6 hxg3 25. Qxh7 gxh2+ 26. Kxh2 Bd5 27. Qg8+ Ke7 28. exf6+ Kd7 29. Qg5 Bc4 30. Ng3 cxd4 31. Rd1 Qb6 32. Ngf5 d3 33. Qg4 Rh8 34. Kg3 Qa5 35. Ne3+ Be6 36. f5 Qe5+ 37. Kf2 Qb2+ 38. Kg1 Bxa2 39. Qe4 Rae8 40. Qb7+ Kd8 41. Qb8+ Kd7 42. Qxa7+ Kc6 43. Qa6+ Kc5 44. Qa5+ Kc6 45. Qa6+ Kc5 46. Qxd3 Rxh6 47. Qxd6+ Kb5 48. Qd7+ Kc5 49. Qxe8 |
| ECO C50 in 1990 play it! weyerstrass defeats black's de groot by checkmate in 47 moves | 1. e4 e5 2. Nf3 Nc6 3. Bc4 d6 4. d4 Be6 5. d5 Nd4 6. Nxd4 exd4 7. dxe6 fxe6 8. Qg4 Qe7 9. Bg5 Nf6 10. Bxf6 Qxf6 11. Bxe6 Ke7 12. Bb3 c6 13. O-O d5 14. exd5 cxd5 15. Na3 Kd6 16. Rad1 Rd8 17. Rxd4 Kc5 18. Rfd1 Be7 19. Rxd5+ Kc6 20. Qc4+ Kb6 21. Qb5+ Kc7 22. Rd7+ Rxd7 23. Rxd7+ Kb8 24. Qxb7# |
| ECO C34 in 1974 play it! weyerstrass defeats black's van der berg by checkmate in 77 moves | 1. e4 e5 2. f4 exf4 3. Nf3 Nf6 4. Nc3 Qe7 5. d3 c6 6. Bxf4 d5 7. Qe2 Nbd7 8. O-O-O Nc5 9. Bg5 dxe4 10. Nxe4 Bg4 11. Bxf6 gxf6 12. Nxf6+ Kd8 13. Qxe7+ Bxe7 14. Nxg4 Bf8 15. Re1 Rg8 16. Nf6 Rg7 17. Re8+ Kc7 18. Rxa8 Rg6 19. Ne8+ Kd7 20. Ne5+ Ke7 21. Nxg6+ fxg6 22. g4 h5 23. Bh3 hxg4 24. Re1+ Kf7 25. Bxg4 Nd7 26. Be6+ Ke7 27. Bc4+ Ne5 28. Rxe5+ Kd7 29. Be6+ Ke7 30. Rc8 Bh6+ 31. Kd1 Kf8 32. Nd6+ Kg7 33. Ne4 Bf4 34. Rg8+ Kh6 35. Nd6 Bxe5 36. Nf7+ Kh5 37. Nxe5 b5 38. Nf3 a5 39. Rh8# |
| ECO C24 in 1989 play it! weyerstrass defeats black's van hemert by checkmate in 41 moves | 1. e4 e5 2. Bc4 Nf6 3. d3 d6 4. Nc3 a6 5. f4 Nh5 6. Qxh5 g6 7. Qf3 b5 8. Bb3 Nc6 9. Nge2 Be7 10. O-O Na5 11. fxe5 dxe5 12. Qxf7+ Kd7 13. Be6+ Kc6 14. Bd5+ Kd6 15. Bxa8 Rf8 16. Nxb5+ Kd7 17. Qd5+ Ke8 18. Bc6+ Bd7 19. Rxf8+ Bxf8 20. Bg5 Qxg5 21. Qxd7# |
| ECO C91 in 1969 play it! weyerstrass defeats black's baart joan in 73 moves | 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. d4 exd4 10. cxd4 Bg4 11. d5 Ne5 12. Nbd2 c6 13. dxc6 Nxc6 14. h3 Bh5 15. Nf1 Qd7 16. Ng3 Bxf3 17. Qxf3 Nd4 18. Qd3 Nxb3 19. axb3 Rfd8 20. Nf5 g6 21. Nxe7+ Qxe7 22. Bg5 Kg7 23. Qc3 Qe5 24. f4 Qxc3 25. bxc3 Nd7 26. Bxd8 Rxd8 27. Rxa6 Nc5 28. Ra7 Nxb3 29. Rb1 Nd2 30. Rxb5 Nxe4 31. c4 Rc8 32. Rbb7 Rf8 33. Re7 Nf6 34. Kf2 Kg8 35. Ra6 Rc8 36. Rxd6 Kg7 37. Rd4 |
| ECO C70 in 1971 play it! weyerstrass defeats black's roos a by checkmate in 57 moves | 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 b5 5. Bb3 h6 6. O-O Nf6 7. Re1 Bc5 8. c3 O-O 9. d4 exd4 10. cxd4 Bb4 11. Nc3 Re8 12. e5 Nh7 13. Bc2 d6 14. exd6 cxd6 15. Rxe8+ Qxe8 16. Qd3 Nf6 17. Bd2 Bb7 18. Nd5 Nxd5 19. Qh7+ Kf8 20. Qh8+ Ke7 21. Re1+ Ne5 22. Qxg7 Kd8 23. dxe5 Bxd2 24. Nxd2 Qe7 25. Rc1 dxe5 26. Be4 Rc8 27. Qh8+ Kd7 28. Bf5+ Kd6 29. Ne4# |
| ECO C16 in 1980 play it! weyerstrass defeats black's sargon compute in 61 moves | 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 Bxc3+ 5. bxc3 Nc6 6. Nf3 Nge7 7. Bd3 Bd7 8. O-O O-O 9. Bxh7+ Kxh7 10. Ng5+ Kg6 11. Qg4 f5 12. Qg3 f4 13. Qg4 Qe8 14. Bxf4 Qc8 15. h4 Rg8 16. Nxe6+ Kf7 17. Ng5+ Kg6 18. e6 Bxe6 19. Nxe6+ Kf7 20. Rae1 Qd7 21. Ng5+ Ke8 22. Qh5+ g6 23. Qh7 Kd8 24. Ne6+ Kc8 25. Nc5 Qd8 26. Bg5 b6 27. Bxe7 Nxe7 28. Rxe7 bxc5 29. Rxc7+ Qxc7 30. Qxg8+ Qd8 31. Qxg6 |
| ECO B18 in 1969 play it! weyerstrass defeats black's baart joan in 53 moves | 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. Nf3 Nd7 7. Bd3 Bxd3 8. Qxd3 Qc7 9. Be3 Ngf6 10. O-O-O e6 11. c4 O-O-O 12. Kb1 Bd6 13. Qb3 Ng4 14. Ng5 Rdf8 15. N5e4 Bxg3 16. hxg3 Nxe3 17. Qxe3 h6 18. Qa3 Kb8 19. c5 e5 20. Nd6 exd4 21. Rxd4 Nf6 22. Rb4 b6 23. cxb6 Qe7 24. Qxa7+ Qxa7 25. bxa7+ Kxa7 26. Rb7+ Ka6 27. Rh4 |
| ECO B03 in 1990 play it! weyerstrass defeats black's turbo chess comp by checkmate in 49 moves | 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 dxe5 6. fxe5 Nc6 7. Be3 Bf5 8. Nc3 e6 9. Nf3 Be7 10. d5 Nb4 11. Nd4 Bg6 12. a3 c5 13. Nxe6 fxe6 14. axb4 cxb4 15. Na4 Nxa4 16. Qxa4+ Kf7 17. Be2 exd5 18. O-O+ Ke6 19. Rad1 Be8 20. Bg4+ Kxe5 21. Qc2 Bg6 22. c5 Bxc5 23. Qxc5 Rg8 24. Bd4+ Ke4 25. Qc2# |
| ECO B03 in 1990 play it! weyerstrass defeats black's turbo chess comp by checkmate in 57 moves | 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 dxe5 6. fxe5 Nc6 7. Be3 Bf5 8. Nc3 e6 9. Nf3 Be7 10. d5 Nb4 11. Nd4 Bg6 12. a3 c5 13. Nxe6 fxe6 14. axb4 cxb4 15. Na4 exd5 16. Nxb6 axb6 17. Rxa8 Qxa8 18. cxd5 Bc5 19. Bb5+ Kd8 20. Bg5+ Kc8 21. d6 Rf8 22. d7+ Kc7 23. Rf1 Rb8 24. e6 Rg8 25. e7 h6 26. Bf4+ Bd6 27. Qc1+ Kb8 28. Bxd6+ Ka7 29. Qa1# |
| ECO B02 in 1977 play it! weyerstrass defeats black's drent in 91 moves | 1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. d4 d6 5. f4 dxe5 6. fxe5 Nc6 7. Be3 Bf5 8. Nc3 e6 9. Nf3 Bg4 10. Be2 Bxf3 11. gxf3 Qh4+ 12. Bf2 Qf4 13. c5 Nd7 14. Qd3 Be7 15. Rd1 Bh4 16. O-O Bxf2+ 17. Rxf2 O-O-O 18. Qe4 Qxe4 19. fxe4 f6 20. exf6 Nxf6 21. e5 Nd5 22. Nxd5 Rxd5 23. Bc4 Rxd4 24. Bxe6+ Kb8 25. Rxd4 Nxd4 26. Bd5 c6 27. Bf7 Rc8 28. e6 Rc7 29. Bg8 Re7 30. Rf7 Rxf7 31. exf7 Ne6 32. Bxh7 Kc7 33. Kf2 Kd8 34. Bf5 Nf8 35. b4 Ke7 36. Bc8 b6 37. cxb6 axb6 38. a4 Kd6 39. a5 Kc7 40. Bf5 c5 41. a6 cxb4 42. Ke2 b5 43. Kd2 Kb6 44. Bc8 Ng6 45. h4 Nf8 46. h5 |
| ECO D54 in 1973 play it! weyerstrass defeats black's baars in 53 moves | 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 Nbd7 6. Nf3 h6 7. Bh4 dxc4 8. Bxc4 b6 9. O-O Bb7 10. Re1 Ne4 11. Bxe7 Qxe7 12. Nxe4 Bxe4 13. Nd2 Bb7 14. e4 O-O 15. Nf1 Nf6 16. d5 exd5 17. exd5 Qd6 18. Ne3 Rfd8 19. Qf3 Rd7 20. Rad1 Rad8 21. Nf5 Qc5 22. Nxh6+ gxh6 23. Qxf6 Rd6 24. Qf4 c6 25. Re7 Rf8 26. Rxb7 cxd5 27. Rd3 |
| ECO D51 in 1973 play it! weyerstrass defeats black's cornelisse a in 85 moves | 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 h6 6. Bh4 Be7 7. Nf3 c5 8. cxd5 exd5 9. dxc5 Nxc5 10. Bb5+ Bd7 11. O-O Bc6 12. Nd4 Qd7 13. Rc1 O-O 14. Bxc6 bxc6 15. Na4 Nxa4 16. Qxa4 Rfc8 17. Rxc6 Rxc6 18. Qxc6 Rd8 19. Qxd7 Rxd7 20. Rc1 Ne4 21. Bxe7 Rxe7 22. Rc8+ Kh7 23. f3 Nf6 24. Kf2 Kg6 25. b4 Rb7 26. b5 Nd7 27. a4 Nb6 28. Rc6+ f6 29. a5 Nc4 30. a6 Rb6 31. Rxb6 Nxb6 32. Nc6 Nc8 33. Nxa7 Nb6 34. Nc6 Kf7 35. e4 dxe4 36. fxe4 Ke6 37. Ke3 Kd6 38. Kd4 g6 39. e5+ fxe5+ 40. Nxe5 g5 41. Nc4+ Kc7 42. Nxb6 Kxb6 43. g4 |
| ECO D21 in 1974 play it! weyerstrass defeats black's bakker j in 80 moves | 1. d4 d5 2. c4 dxc4 3. Nf3 c6 4. e3 b5 5. a4 e6 6. axb5 cxb5 7. b3 Bb4+ 8. Bd2 Bxd2+ 9. Nfxd2 Nc6 10. Ne4 Qd5 11. Nbc3 Qd8 12. Nxb5 cxb3 13. Qxb3 Nge7 14. Ned6+ Kf8 15. Be2 Rb8 16. Qa3 a6 17. Nxc8 axb5 18. Nxe7 Qxe7 19. O-O Qxa3 20. Rxa3 Ke7 21. Rb1 b4 22. Rab3 Rb6 23. Bf3 Rhb8 24. Bxc6 Rxc6 25. Kf1 Rcb6 26. Ke2 Kd6 27. e4 f6 28. Kd3 g6 29. R1b2 h5 30. f3 f5 31. Ke3 g5 32. g3 R8b7 33. Ra2 Rc6 34. Rab2 Rcb6 35. Kd3 f4 36. Ra2 fxg3 37. hxg3 h4 38. gxh4 gxh4 39. Rh2 Rh7 40. f4 Ra7 |