| ECO C00 in 1974 play it! weyerstrass defeats white's hebing in 66 moves | 1. e4 e6 2. Nf3 d5 3. e5 c5 4. c3 Qb6 5. d4 Bd7 6. Nbd2 Bb5 7. c4 dxc4 8. Nxc4 Bxc4 9. Bxc4 Qb4+ 10. Nd2 cxd4 11. O-O Ne7 12. a3 Qc5 13. Ne4 Qxe5 14. Re1 Nbc6 15. Qf3 Ng6 16. Ng5 Qxe1+ 17. Bf1 Nge5 18. Qf4 Be7 19. Ne4 g5 20. Nf6+ Bxf6 21. Qxf6 Rg8 22. h3 g4 23. g3 Nf3+ 24. Kg2 Qe4 25. hxg4 Nd2+ 26. Kg1 Nxf1 27. Kxf1 Qxg4 28. Bf4 Qg6 29. Qh4 e5 30. Re1 f6 31. Qh3 Qg4 32. Qxh7 O-O-O 33. Qe4 exf4 |
| ECO C02 in 1981 play it! weyerstrass defeats white's van dungen by checkmate in 66 moves | 1. e4 e6 2. d4 d5 3. e5 c5 4. dxc5 Nc6 5. Nf3 Bxc5 6. Bd3 f6 7. Qe2 fxe5 8. Nxe5 Nf6 9. Bg5 Nxe5 10. Qxe5 Bxf2+ 11. Ke2 O-O 12. Nc3 Bc5 13. Nb5 a6 14. Qc3 Qb6 15. b4 Be7 16. Be3 Qd8 17. Nc7 Bxb4 18. Qxb4 Qxc7 19. Raf1 e5 20. Bb6 Qc6 21. Kd2 Be6 22. Bc5 Rf7 23. Be7 e4 24. Be2 Rc8 25. Bd1 Rc7 26. Bxf6 Rxf6 27. Rxf6 gxf6 28. Qd4 Rf7 29. Bh5 Rc7 30. Bd1 f5 31. g4 f4 32. g5 Qc5 33. Qe5 Qe3# |
| ECO C02 in 1972 play it! weyerstrass defeats white's beukman in 76 moves | 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Bd3 cxd4 6. cxd4 Nxd4 7. Bxh7 Qc7 8. Nc3 Qxe5+ 9. Be3 Rxh7 10. Qxd4 Qxd4 11. Bxd4 Bd7 12. Nf3 f6 13. O-O Bd6 14. Rfe1 Ne7 15. h3 e5 16. Bxe5 Bxe5 17. Nxe5 fxe5 18. Rxe5 Bc6 19. Rae1 g6 20. Nxd5 Bxd5 21. Rxd5 Rc8 22. Re2 Rc2 23. Rxc2 Nxd5 24. Rc5 Rd7 25. a3 Nf4 26. Kh2 Rd2 27. Re5+ Kf7 28. Kg3 Nh5+ 29. Kf3 Rxb2 30. Re3 b6 31. g4 Nf6 32. Rd3 a5 33. g5 Ne8 34. Kg3 b5 35. f4 b4 36. h4 a4 37. Rd7+ Ke6 38. Rd4 Nd6 |
| ECO C02 in 1972 play it! weyerstrass defeats white's bezem in 62 moves | 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. Be2 cxd4 7. cxd4 Bb4+ 8. Nc3 Nge7 9. a3 Bxc3+ 10. bxc3 Bd7 11. O-O O-O 12. Qd3 h6 13. g4 f5 14. g5 h5 15. Nh4 g6 16. Nxg6 Nxg6 17. Bxh5 Kg7 18. Kg2 Rh8 19. Be2 Rh7 20. Rh1 Rah8 21. Rb1 Qc7 22. c4 Ncxe5 23. dxe5 Qxe5 24. h3 Bc6 25. cxd5 Bxd5+ 26. Bf3 Bxf3+ 27. Kf1 Qd5 28. Qc3+ e5 29. Qc7+ Qf7 30. Qc3 Bxh1 31. f3 Rxh3 |
| ECO C02 in 1988 play it! weyerstrass defeats white's hilhorst in 66 moves | 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Qb6 5. Nf3 Bd7 6. a3 a5 7. Be2 Ne7 8. O-O cxd4 9. cxd4 Nbc6 10. b3 Nf5 11. Bb2 Be7 12. Kh1 h5 13. Nc3 g5 14. Na4 Qa7 15. Nc5 g4 16. Ne1 Ncxd4 17. Nxd7 Kxd7 18. Bd3 Qb6 19. Bxf5 Nxf5 20. Nd3 Rag8 21. b4 h4 22. Qa4+ Qc6 23. Qxa5 Ra8 24. Nc5+ Bxc5 25. Qxc5 Qxc5 26. bxc5 Rhc8 27. Rac1 Ra5 28. Kg1 Raxc5 29. Rxc5 Rxc5 30. Rd1 Rc2 31. Bc1 Kc6 32. Kf1 d4 33. Bf4 b5 |
| ECO C05 in 1991 play it! weyerstrass defeats white's wiesenekker in 46 moves | 1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Ne4 5. Bd3 Nxd2 6. Bxd2 c5 7. c3 Qb6 8. Nf3 cxd4 9. cxd4 Bd7 10. Bc3 Bb5 11. O-O Be7 12. Qe2 Bxd3 13. Qxd3 Nc6 14. Rfe1 Rc8 15. Re2 h6 16. h3 a6 17. g3 O-O 18. Kg2 Rc7 19. Nh2 Rfc8 20. a3 Qb3 21. Rd1 b5 22. Nf1 a5 23. Nd2 Qxd1 |
| ECO C00 in 1973 play it! weyerstrass defeats white's aardenburg in 52 moves | 1. e4 e6 2. Nc3 c5 3. d3 d5 4. Bf4 d4 5. Bxb8 Rxb8 6. Nce2 f5 7. Ng3 Bd6 8. Qe2 f4 9. e5 fxg3 10. exd6 gxf2+ 11. Qxf2 Qxd6 12. Be2 Nf6 13. Bf3 O-O 14. Ne2 Nd5 15. O-O Ne3 16. Rfe1 b5 17. c3 Nc2 18. c4 bxc4 19. dxc4 Bb7 20. Rac1 Nxe1 21. Rxe1 Bxf3 22. gxf3 Rxb2 23. Qh4 Rxf3 24. Rf1 Rxf1+ 25. Kxf1 d3 26. Nf4 d2 |
| ECO C02 in 1978 play it! weyerstrass defeats white's huijzer in 52 moves | 1. e4 e6 2. d4 d5 3. e5 c5 4. Nf3 cxd4 5. Bd3 Nc6 6. O-O Bc5 7. Bf4 Nge7 8. Nbd2 Ng6 9. Bg3 f5 10. h4 O-O 11. h5 Nh8 12. Bf4 Nf7 13. Nb3 Be7 14. Qd2 h6 15. Rae1 Ng5 16. Nbxd4 Ne4 17. Qd1 Qb6 18. Nxc6 bxc6 19. Qc1 Kh7 20. g4 Bc5 21. Bxe4 fxe4 22. g5 exf3 23. g6+ Kh8 24. Bxh6 Qb4 25. c4 Qxc4 26. Qg5 gxh6 |
| ECO C07 in 1972 play it! weyerstrass defeats white's kennedy in 92 moves | 1. e4 e6 2. d4 d5 3. Nd2 c5 4. c3 Nc6 5. Bb5 Qb6 6. Bxc6+ bxc6 7. Ngf3 cxd4 8. cxd4 Ba6 9. exd5 cxd5 10. Qa4+ Bb5 11. Qb3 Bd6 12. a4 Ba6 13. Qxb6 axb6 14. Nb3 Ne7 15. Bd2 Bc4 16. Nc1 O-O 17. b3 Ba6 18. b4 Rfc8 19. Nb3 Bc4 20. Nc1 Nc6 21. Ne2 Nxb4 22. Bxb4 Bxb4+ 23. Kf1 Bc3 24. Ra3 Bb2 25. Re3 Rxa4 26. g3 Ra1+ 27. Kg2 Rxh1 28. Kxh1 Bxe2 29. Rxe2 Rc1+ 30. Kg2 Bc3 31. Ra2 Ba5 32. h4 f6 33. g4 Kf7 34. h5 Ke7 35. Ra3 Kd6 36. Kg3 e5 37. Rb3 e4 38. Nh4 Rc3+ 39. Rxc3 Bxc3 40. Nf5+ Kd7 41. Nxg7 b5 42. Nf5 b4 43. Ne3 Ke6 44. Nc2 b3 45. Na3 b2 46. Kf4 Bxd4 |
| ECO C05 in 1989 play it! weyerstrass defeats white's nn in 48 moves | 1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Ne4 5. Nxe4 dxe4 6. Bc4 a6 7. Ne2 b5 8. Bb3 c5 9. dxc5 Nd7 10. Bf4 Bxc5 11. Ng3 Bb7 12. O-O O-O 13. Qg4 Qe7 14. Rad1 Kh8 15. Nh5 f5 16. exf6 Nxf6 17. Nxf6 Qxf6 18. Bg5 Bxf2+ 19. Kh1 Qf5 20. Bxe6 Qxg4 21. Bxg4 e3 22. Rd7 Bc8 23. Rd4 Bxg4 24. Rxg4 e2 |
| ECO C00 in 1985 play it! weyerstrass defeats white's bout j in 86 moves | 1. e4 e6 2. Nf3 d5 3. exd5 exd5 4. d4 Bd6 5. Bd3 Ne7 6. Bg5 Nbc6 7. c3 Bg4 8. Nbd2 f6 9. Be3 Qd7 10. h3 Bf5 11. Bb5 a6 12. Ba4 O-O-O 13. b4 Qe6 14. b5 Bd3 15. Nb3 axb5 16. Qxd3 bxa4 17. Nc5 Bxc5 18. dxc5 Ne5 19. Nxe5 fxe5 20. O-O h6 21. Rab1 d4 22. Qb5 dxe3 23. Qxb7+ Kd7 24. Rfd1+ Ke8 25. Rxd8+ Kxd8 26. Rd1+ Ke8 27. fxe3 Kf7 28. Qf3+ Kg6 29. Qe4+ Qf5 30. Qxa4 Rf8 31. Qh4 Nc6 32. g4 Qf3 33. Re1 Kh7 34. g5 Rf5 35. g6+ Kxg6 36. Kh2 Qf2+ 37. Qxf2 Rxf2+ 38. Kg3 Rxa2 39. Kf3 Kf5 40. Rd1 e4+ 41. Kg3 Re2 42. Rd7 Rxe3+ 43. Kf2 Rxc3 |
| ECO C00 in 1985 play it! weyerstrass defeats white's kerkmeester in 52 moves | 1. e4 e6 2. Nc3 d5 3. d3 Nf6 4. Qe2 Be7 5. g3 c5 6. Bg2 Nc6 7. f4 b6 8. e5 Nd7 9. Nf3 Bb7 10. b3 b5 11. O-O b4 12. Nd1 g6 13. Bb2 a5 14. c4 bxc3 15. Nxc3 Nb6 16. Nb5 Qd7 17. Rfc1 O-O 18. a4 Rac8 19. Ba3 Nb4 20. h4 Ba6 21. Bxb4 axb4 22. Nd6 Bxd6 23. exd6 Qxd6 24. h5 Nd7 25. Ne5 f6 26. Nxd7 Qxd7 |
| ECO C01 in 1990 play it! weyerstrass defeats white's kerkmeester in 64 moves | 1. e4 e6 2. d4 d5 3. exd5 exd5 4. Bd3 c5 5. dxc5 Bxc5 6. Qe2+ Ne7 7. Nf3 Nc6 8. c3 O-O 9. O-O h6 10. Nbd2 Bg4 11. h3 Bh5 12. Nb3 Bd6 13. g4 Bg6 14. Nbd4 Re8 15. Re1 Qd7 16. Be3 h5 17. Nxc6 bxc6 18. Bxg6 Nxg6 19. Ng5 Bf4 20. Qf3 hxg4 21. Qxg4 Qxg4+ 22. hxg4 Rxe3 23. fxe3 Bxg5 24. e4 Ne5 25. Re2 Nxg4 26. Rg2 Be3+ 27. Kf1 Nf6 28. Ke2 Bb6 29. exd5 Nxd5 30. Kf3 Re8 31. Re2 Ne3 32. Rae1 f5 |
| ECO C02 in 1978 play it! weyerstrass defeats white's van hamond in 82 moves | 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Qb6 5. Nf3 Bd7 6. a3 a5 7. Be2 Nc6 8. O-O Nge7 9. Qd3 cxd4 10. cxd4 Nf5 11. Rd1 Be7 12. Nc3 O-O 13. Bf1 f6 14. g4 Nfxd4 15. Nxd4 Nxd4 16. Qxd4 Bc5 17. Qd2 fxe5 18. Kh1 Rxf2 19. Qd3 Bc6 20. Bg2 Raf8 21. Rd2 e4 22. Qg3 Rf1+ 23. Bxf1 Rxf1+ 24. Kg2 Rg1+ 25. Kh3 Rxg3+ 26. Kxg3 d4 27. Ne2 Bd6+ 28. Kh3 Qb3+ 29. Ng3 Bxg3 30. hxg3 Qf3 31. Rh2 e3 32. b3 h5 33. Rc2 Qh1+ 34. Rh2 Bg2+ 35. Kh4 Qxh2+ 36. Kg5 hxg4 37. Bb2 Bf3 38. Kf4 Qh6+ 39. Ke5 Kf7 40. Bxd4 Qf6+ 41. Kd6 Qxd4+ |
| ECO C00 in 1989 play it! weyerstrass defeats white's fikkert in 68 moves | 1. e4 e6 2. Nf3 d5 3. exd5 exd5 4. d4 Bd6 5. Nc3 Ne7 6. Be2 Nbc6 7. h3 Bf5 8. a3 Qd7 9. Be3 f6 10. Qd2 Nd8 11. Nb5 Ne6 12. Nxd6+ Qxd6 13. b4 O-O 14. Rc1 a5 15. c4 dxc4 16. Bxc4 Nd5 17. O-O axb4 18. Bxd5 Qxd5 19. Qxb4 Be4 20. Ne1 Rfd8 21. f3 Bg6 22. Rf2 Rd6 23. Rb2 Rb6 24. Qc3 Rba6 25. Rb3 Rc6 26. Qb2 Rxc1 27. Bxc1 Qxd4+ 28. Qf2 Qd5 29. Qe3 Re8 30. Qc3 Nd4 31. Rb2 Ne2+ 32. Rxe2 Rxe2 33. Kf1 Re7 34. Be3 Qe5 |
| ECO C16 in 1985 play it! weyerstrass defeats white's van ekelen in 72 moves | 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 Qd7 5. a3 Bxc3+ 6. bxc3 b6 7. Nf3 Ne7 8. a4 Ba6 9. Bxa6 Nxa6 10. Qd3 Nb8 11. Ng5 h6 12. Nh3 Nbc6 13. f4 Na5 14. Nf2 h5 15. Nd1 Nf5 16. Ne3 Nxe3 17. Qxe3 O-O-O 18. Qd3 Kb8 19. O-O g6 20. Be3 Nc4 21. Bf2 c6 22. Bh4 Rc8 23. Bf6 Rhg8 24. h4 c5 25. Rfb1 Ka8 26. Kf2 Rc6 27. Rb3 Rgc8 28. Ra2 Nxe5 29. Bxe5 c4 30. Qd1 cxb3 31. cxb3 Rxc3 32. g3 Qc6 33. Kg2 Rc2+ 34. Qxc2 Qxc2+ 35. Rxc2 Rxc2+ 36. Kh3 Rc3 |
| ECO C06 in 1980 play it! weyerstrass defeats white's sargon compute in 30 moves | 1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 Nc6 7. Ngf3 Qb6 8. Qa4 cxd4 9. cxd4 Be7 10. O-O O-O 11. Nb3 Qd8 12. Be3 Nb6 13. Qb5 a6 14. Bxh7+ Kxh7 15. Qd3+ Kg8 |
| ECO C01 in 1972 play it! weyerstrass defeats white's kennedy in 92 moves | 1. e4 e6 2. d4 d5 3. exd5 exd5 4. c4 Nf6 5. Bg5 Be7 6. Nf3 Be6 7. c5 b6 8. cxb6 axb6 9. Bb5+ Bd7 10. Qe2 O-O 11. O-O Re8 12. Bxd7 Nbxd7 13. Nc3 h6 14. Bd2 c5 15. Rfe1 c4 16. h3 Ba3 17. Be3 Bb4 18. a3 Bxc3 19. bxc3 Ne4 20. Qc2 b5 21. Qb2 Qa5 22. Rec1 Reb8 23. Ne5 Qc7 24. Bf4 Nxe5 25. Bxe5 Nd6 26. Qd2 f6 27. Bg3 Rb6 28. Qf4 Qd7 29. Qf3 Nb7 30. Re1 Na5 31. h4 Nb3 32. Ra2 b4 33. a4 bxc3 34. Qxc3 Rxa4 35. Rae2 Ra8 36. Re7 Qf5 37. Qe3 Ra1 38. Re8+ Kh7 39. Kh2 Rxe1 40. Qxe1 Ra6 41. Re7 Ra1 42. Qc3 Qb1 43. Kh3 h5 44. f3 Qg6 45. Re1 Rxe1 46. Bxe1 Qd3 |
| ECO C02 in 1975 play it! weyerstrass defeats white's van den aardweg in 78 moves | 1. e4 e6 2. d4 d5 3. e5 c5 4. Qg4 cxd4 5. Nf3 f5 6. Qg3 Nc6 7. Bd3 Bd7 8. O-O Qc7 9. Re1 Nge7 10. a3 O-O-O 11. b4 Rg8 12. b5 Na5 13. Bb2 g5 14. a4 g4 15. Nh4 Ng6 16. Nxg6 Rxg6 17. Bxd4 Be7 18. Nd2 Rdg8 19. c4 dxc4 20. Bxc4 Kb8 21. Rac1 Qd8 22. Be3 h5 23. Qf4 h4 24. Qd4 b6 25. Nb3 Nxb3 26. Bxb3 Ba3 27. Rc3 Qe7 28. Rd3 Bc8 29. a5 Bb4 30. Red1 g3 31. axb6 gxh2+ 32. Kh1 Qb7 33. bxa7+ Ka8 34. Qd5 exd5 35. Bxd5 Qxd5 36. Rxd5 Be7 37. b6 Rxg2 38. Rd7 f4 39. Bxf4 Rg1+ |
| ECO C01 in 1975 play it! weyerstrass defeats white's van der haar in 28 moves | 1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nf3 Bg4 5. Be2 Bd6 6. Nc3 Ne7 7. Nb5 O-O 8. O-O Nbc6 9. Be3 a6 10. Nxd6 Qxd6 11. Nh4 Bxe2 12. Qxe2 Rae8 13. Qg4 f5 14. Qg3 f4 |