| ECO C00 in 1990 play it! de jong p defeats black's thorn leeson j in 55 moves | 1. e4 e6 2. Qe2 c5 3. f4 Nc6 4. Nf3 g6 5. g3 Bg7 6. Bg2 Nge7 7. O-O O-O 8. c3 b6 9. Na3 a5 10. d3 Ba6 11. Nc2 d5 12. e5 Qc7 13. Bd2 Rad8 14. Be1 c4 15. d4 b5 16. g4 Rb8 17. Ne3 Rfe8 18. f5 exf5 19. gxf5 Bh6 20. Nh4 Bc8 21. Ng4 Bg5 22. Nf3 h5 23. Nxg5 hxg4 24. Qxg4 Nxf5 25. Bxd5 Nxe5 26. Qh3 Qb6 27. Bxf7+ Kf8 28. Qh8+ |
| ECO C00 in 1991 play it! de jong p defeats black's braams a in 77 moves | 1. e4 e6 2. Qe2 a6 3. f4 b5 4. Nf3 c5 5. g3 Bb7 6. Bg2 Qb6 7. d3 Nc6 8. c3 Nf6 9. O-O Be7 10. h3 h5 11. Be3 d6 12. Na3 Qc7 13. Nc2 Rc8 14. Bf2 Nd7 15. Ne3 Nb6 16. b3 Bf6 17. Rac1 e5 18. Rfd1 Ne7 19. Nh2 exf4 20. gxf4 Ng6 21. Qf3 Qd8 22. Nf5 Rb8 23. Qe3 O-O 24. Bf3 Bc8 25. Bxh5 Bxf5 26. exf5 Nd5 27. Qf3 Ngxf4 28. d4 Nxh5 29. Qxh5 cxd4 30. Bxd4 Qc7 31. Ng4 Bxd4+ 32. Rxd4 Qb6 33. Kh2 Rfe8 34. Rxd5 Re2+ 35. Kh1 Rbe8 36. Rg1 Kf8 37. Qh8+ Ke7 38. Qxg7 Kd7 39. Nf6+ |
| ECO C00 in 1983 play it! de jong p defeats black's van der kaay f in 61 moves | 1. e4 e6 2. Qe2 c5 3. f4 Nc6 4. Nf3 Nf6 5. d3 d5 6. e5 Nd7 7. g3 Be7 8. Bg2 a6 9. O-O Qc7 10. Be3 b6 11. c4 d4 12. Bf2 Bb7 13. Nbd2 O-O-O 14. Ne4 Rdg8 15. a3 h6 16. h4 Nd8 17. b4 Bxe4 18. Qxe4 f5 19. exf6 gxf6 20. bxc5 bxc5 21. Rab1 Nb6 22. Be1 f5 23. Qe2 Na4 24. Ne5 Nc3 25. Bxc3 dxc3 26. Qf3 Qa7 27. Nc6 Nxc6 28. Qxc6+ Kd8 29. Rb7 Qxb7 30. Qxb7 Rxg3 31. Qb8+ |
| ECO C00 in 1989 play it! de jong p defeats black's van tuinen f in 47 moves | 1. e4 e6 2. Qe2 b6 3. f4 Bb7 4. Nf3 c5 5. g3 Nc6 6. c3 Nf6 7. Bg2 Qc7 8. Na3 a6 9. O-O b5 10. Nc2 d5 11. e5 Nd7 12. d4 O-O-O 13. Be3 c4 14. Nd2 f5 15. exf6 gxf6 16. Bf2 Qd6 17. b3 Bg7 18. a4 e5 19. axb5 axb5 20. bxc4 dxc4 21. Ne4 Qc7 22. d5 Ncb8 23. d6 Qc6 24. Nb4 |
| ECO C00 in 1986 play it! de jong p defeats black's dorpema h in 33 moves | 1. e4 e6 2. Qe2 b6 3. f4 Ba6 4. d3 Be7 5. Nf3 Nc6 6. c4 Bc5 7. Be3 Qe7 8. a3 Nf6 9. d4 Nxe4 10. dxc5 Nxc5 11. Qc2 d5 12. b4 Qf6 13. bxc5 Qxa1 14. cxd5 Nb8 15. Bd4 Bxf1 16. Bxa1 Bxg2 17. Qxg2 |
| ECO C00 in 1987 play it! de jong p defeats black's de jongh r in 97 moves | 1. e4 e6 2. Qe2 Nc6 3. f4 Nd4 4. Qd1 c5 5. c3 Nc6 6. d4 cxd4 7. cxd4 d5 8. e5 Qb6 9. Nf3 Bd7 10. Nc3 Nh6 11. Bb5 Bb4 12. Bxc6 Bxc6 13. O-O Rc8 14. a3 Qa6 15. Bd2 Bxc3 16. Bxc3 O-O 17. Bb4 Rfe8 18. Nh4 Bb5 19. Rf2 Bd3 20. g4 Qc4 21. Bc3 Be4 22. h3 Qd3 23. Qxd3 Bxd3 24. Rd1 Be4 25. f5 exf5 26. g5 Rc6 27. Kh2 f6 28. gxh6 g6 29. Rg1 Kf7 30. Nf3 Bxf3 31. Rxf3 fxe5 32. dxe5 Rc4 33. Rd1 Ke6 34. Rfd3 Rd8 35. Rd4 Rxd4 36. Bxd4 Rc8 37. Rd2 b5 38. Kg3 a5 39. h4 b4 40. axb4 axb4 41. Kf4 b3 42. Bc3 Rc4+ 43. Rd4 Rc8 44. Rb4 Kf7 45. Rb7+ Ke6 46. Rb6+ Kf7 47. e6+ Ke7 48. Ke5 f4 49. Rb7+ |
| ECO C00 in 1984 play it! de jong p defeats black's van tuinen f in 59 moves | 1. e4 e6 2. Qe2 b6 3. f4 Bb7 4. Nf3 Nf6 5. d3 c5 6. g3 Nc6 7. Bg2 Be7 8. O-O Qc7 9. Nc3 O-O-O 10. a4 a6 11. e5 Ne8 12. Be3 d5 13. d4 h6 14. Rad1 c4 15. b3 Bb4 16. Na2 a5 17. Nd2 Bxd2 18. Qxd2 Ne7 19. b4 Ba6 20. c3 Nf5 21. Bf2 Qe7 22. Rb1 Kb8 23. bxa5 Ka7 24. axb6+ Kb7 25. Nb4 g5 26. Qb2 gxf4 27. Nxa6 fxg3 28. Nc5+ Kb8 29. hxg3 Rg8 30. a5 |
| ECO C10 in 1991 play it! de jong p defeats black's vogel g in 95 moves | 1. e4 e6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nd7 5. Nf3 Ngf6 6. Bg5 Be7 7. Ng3 b6 8. Bd3 Bb7 9. O-O O-O 10. Re1 c5 11. c3 cxd4 12. Nxd4 Nc5 13. Bc2 Qd5 14. Nf3 Qxd1 15. Raxd1 Bxf3 16. gxf3 Rad8 17. Nf5 Rde8 18. Nxe7+ Rxe7 19. Rd2 Rd7 20. Rxd7 Ncxd7 21. Rd1 h6 22. Bh4 g5 23. Bg3 Rc8 24. f4 Rc5 25. fxg5 hxg5 26. Ba4 Ne5 27. Kg2 Neg4 28. Rd8+ Kg7 29. Bc2 Ne5 30. Bb1 Nfd7 31. f4 gxf4 32. Bxf4 Kf6 33. h4 Ke7 34. Ra8 a5 35. h5 f5 36. h6 Ng6 37. Be3 Rc4 38. h7 Rg4+ 39. Kf2 Ndf8 40. Bxb6 Kf7 41. Ra7+ Kf6 42. Bd8+ Ke5 43. Rxa5+ Kf4 44. Ra4+ Ke5 45. Rxg4 fxg4 46. Bb6 Kf6 47. Kg3 Kg7 48. a4 |
| ECO C16 in 1989 play it! de jong p defeats black's lesi j in 39 moves | 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 a6 5. Qg4 Bf8 6. Nf3 h6 7. Bd3 Nc6 8. a3 Nge7 9. h4 Nf5 10. Qf4 Bd7 11. g4 Nfe7 12. g5 Nf5 13. Bxf5 exf5 14. gxh6 gxh6 15. Nxd5 Be6 16. Nf6+ Ke7 17. Be3 Bg7 18. d5 Bxd5 19. Qxf5 Bxf3 20. Bc5+ |
| ECO C00 in 1983 play it! de jong p defeats black's jansen a in 53 moves | 1. e4 e6 2. d3 d5 3. Nd2 d4 4. Ngf3 Nc6 5. g3 e5 6. Nc4 f6 7. Bg2 Be6 8. b3 Bb4+ 9. Bd2 Qd7 10. O-O g5 11. Ne1 Nge7 12. f4 gxf4 13. gxf4 Bg4 14. Nf3 Ng6 15. Bxb4 Nxb4 16. fxe5 Bxf3 17. Rxf3 fxe5 18. Qd2 Nc6 19. Raf1 Nf4 20. Nxe5 Nxe5 21. Rxf4 O-O-O 22. Qa5 Nc6 23. Qh5 Qd6 24. Rf7 Nb4 25. R1f6 Rhg8 26. Rxd6 Rxd6 27. Qf5+ |
| ECO C00 in 1984 play it! de jong p defeats black's lucas f in 37 moves | 1. e4 e6 2. d3 d5 3. Nd2 Nf6 4. g3 Be7 5. Ngf3 Nc6 6. Bg2 O-O 7. e5 Nd7 8. d4 f6 9. exf6 Bxf6 10. c3 e5 11. dxe5 Ndxe5 12. Nxe5 Nxe5 13. O-O Nd3 14. Nb3 Nxc1 15. Qxd5+ Kh8 16. Raxc1 Qe8 17. Rce1 Qa4 18. Nc5 Qc2 19. Be4 |
| ECO C00 in 1996 play it! de jong p defeats black's van ree t in 43 moves | 1. e4 e6 2. Nf3 c5 3. b4 cxb4 4. d4 d5 5. e5 Nc6 6. a3 a5 7. axb4 Bxb4+ 8. c3 Bf8 9. Bd3 f5 10. g4 Be7 11. Rg1 g6 12. Na3 Bxa3 13. Bxa3 Nge7 14. gxf5 exf5 15. Qd2 h6 16. Rb1 b6 17. Bb5 Kf7 18. Nh4 g5 19. Rxg5 Rg8 20. Rg3 Rxg3 21. hxg3 Kg7 22. Qf4 |
| ECO C13 in 1992 play it! de jong p defeats black's hut j in 27 moves | 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. Bxf6 Bxf6 6. Nf3 O-O 7. e5 Be7 8. Bd3 c5 9. h4 cxd4 10. Bxh7+ Kh8 11. Qxd4 f6 12. Bg6 f5 13. Ng5 Rf6 14. exf6 |
| ECO C16 in 1988 play it! de jong p defeats black's bergsma h in 63 moves | 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 Ne7 5. a3 Bxc3+ 6. bxc3 c5 7. Qg4 Nf5 8. Nf3 O-O 9. Qh3 f6 10. g4 Nxd4 11. cxd4 c4 12. Be2 Nc6 13. O-O Bd7 14. Qg3 Be8 15. h4 f5 16. gxf5 Rxf5 17. c3 Qd7 18. Ng5 Nd8 19. Bg4 Rf8 20. a4 Bg6 21. Ba3 Re8 22. f4 Bf5 23. Rf2 Rc8 24. Bh5 g6 25. Bg4 h6 26. Nf3 Kh8 27. Bxf5 gxf5 28. Rg2 Nc6 29. Qg6 Rg8 30. Qxh6+ Qh7 31. Qf6+ Rg7 32. Bf8 |
| ECO C00 in 1989 play it! de jong p defeats black's joosten h in 59 moves | 1. e4 e6 2. Qe2 Nf6 3. f4 d5 4. d3 c5 5. Nf3 Nc6 6. c3 Be7 7. g3 b6 8. Bg2 Bb7 9. O-O O-O 10. Na3 a6 11. Nc2 Qc7 12. e5 Nd7 13. d4 cxd4 14. cxd4 a5 15. Qf2 b5 16. f5 Kh8 17. Bg5 Qd8 18. Qd2 Nb6 19. b3 Bc8 20. f6 gxf6 21. Bxf6+ Bxf6 22. exf6 Nd7 23. Ng5 Nxf6 24. Qd3 h6 25. Rxf6 Kg7 26. Rxf7+ Rxf7 27. Qh7+ Kf6 28. Qxf7+ Kxg5 29. h4+ Kg4 30. Qg6+ |
| ECO C00 in 1986 play it! de jong p defeats black's luca a in 61 moves | 1. e4 e6 2. Qe2 c5 3. f4 Nc6 4. Nf3 b6 5. g3 Bb7 6. Bg2 Qc7 7. O-O Nge7 8. c3 g6 9. Na3 a6 10. d4 cxd4 11. cxd4 Bg7 12. Be3 d5 13. e5 b5 14. Rac1 b4 15. Nc2 a5 16. Rfd1 O-O 17. Nce1 Ba6 18. Qd2 Rfc8 19. Nd3 Qb6 20. g4 Rc7 21. Nc5 Bb5 22. Qf2 Rac8 23. Nh4 Nd8 24. f5 Nec6 25. f6 Bf8 26. Nf3 Nb7 27. Nxb7 Qxb7 28. Qh4 Nb8 29. Ng5 h6 30. Nf3 Kh7 31. Bxh6 |
| ECO C00 in 1983 play it! de jong p defeats black's ydo s by checkmate in 55 moves | 1. e4 e6 2. Qe2 Ne7 3. g3 b6 4. Bg2 Bb7 5. d3 Ng6 6. f4 Bc5 7. c3 Bxg1 8. Rxg1 Nc6 9. f5 Nge7 10. Bg5 h6 11. Qh5 Rf8 12. Bh4 g5 13. fxg6 fxg6 14. Qxh6 Ne5 15. Rf1 Rxf1+ 16. Kxf1 d6 17. Bh3 Kd7 18. Qe3 Qf8+ 19. Ke2 Qh8 20. Na3 Qh5+ 21. Kf2 Rf8+ 22. Kg2 d5 23. Nb5 dxe4 24. dxe4 Qf3+ 25. Qxf3 Nxf3 26. Rd1+ Kc6 27. Bxe7 Rf7 28. Nxa7# |
| ECO C01 in 1986 play it! de jong p defeats black's nagtegaal j in 79 moves | 1. e4 e6 2. d4 Ne7 3. Bd3 d5 4. e5 Ng6 5. Nf3 c5 6. c3 Nc6 7. h4 Be7 8. Ng5 Bxg5 9. hxg5 Qb6 10. dxc5 Qxc5 11. Be3 Qe7 12. f4 Qc7 13. Na3 a6 14. Qc2 Bd7 15. Bd2 Ncxe5 16. fxe5 Qxe5+ 17. Kd1 Qg3 18. Bxg6 fxg6 19. c4 O-O 20. Qc3 Qxg2 21. Kc2 e5 22. Rag1 Qe2 23. Re1 Bf5+ 24. Kc1 Qg2 25. Qxe5 d4 26. Qh2 Qxh2 27. Rxh2 d3 28. Reh1 Be4 29. Re1 Bf5 30. Nb1 Rac8 31. Rh4 b5 32. Na3 bxc4 33. Nxc4 Rc6 34. b3 Rfc8 35. Reh1 Kf7 36. Bc3 h6 37. Ne5+ Ke6 38. Nxc6 Rxc6 39. Re1+ Kf7 40. Rc4 |
| ECO C00 in 1985 play it! de jong p defeats black's te winkel h in 17 moves | 1. e4 e6 2. Qe2 e5 3. f4 d6 4. fxe5 dxe5 5. d3 Bc5 6. Be3 Qd6 7. Nc3 Nf6 8. Nf3 Nc6 9. Nb5 |
| ECO C00 in 1983 play it! de jong p defeats black's franck j in 79 moves | 1. e4 e6 2. Qe2 b6 3. g3 Ba6 4. d3 Nc6 5. Be3 Nf6 6. Bg2 e5 7. Nh3 Bc5 8. O-O Bxe3 9. fxe3 h6 10. Nc3 d6 11. Rf2 Qd7 12. Raf1 Ne7 13. Kh1 O-O 14. Rxf6 gxf6 15. Qh5 Kg7 16. Qh4 Qe6 17. Nd5 Ng6 18. Qh5 Bc8 19. Nxc7 Qg4 20. Qxg4 Bxg4 21. Nxa8 Rxa8 22. Nf2 Be6 23. a3 Rc8 24. c4 a5 25. Nd1 Nf8 26. Nc3 Nd7 27. b4 axb4 28. axb4 Ra8 29. Nb5 Ra4 30. Rb1 Ra2 31. Bf1 Bg4 32. Nxd6 Be2 33. Bxe2 Rxe2 34. d4 Kg6 35. Rb3 exd4 36. exd4 Rd2 37. Nf5 Re2 38. Re3 Rb2 39. c5 Rxb4 40. c6 |