| ECO A05 in 1977 play it! nielsen jens defeats black's ionescu constant in 51 moves | 1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. d3 c5 5. O-O e6 6. e4 d6 7. Nbd2 Be7 8. Re1 Nbd7 9. b3 O-O 10. Bb2 Qc7 11. Bh3 Rad8 12. Nh4 Ne5 13. f4 Nc6 14. Ndf3 Rfe8 15. Ng5 e5 16. Rf1 d5 17. Nxf7 Kxf7 18. fxe5 Nd4 19. Bxd4 cxd4 20. Qh5+ Kf8 21. Be6 Bd6 22. Ng6+ hxg6 23. Qh8+ Ke7 24. Qxg7+ Kxe6 25. Rxf6+ Kxe5 26. Rf7+ |
| ECO A05 in 1978 play it! nielsen jens defeats black's sisniega marcel in 81 moves | 1. Nf3 Nf6 2. b3 d5 3. e3 Bf5 4. Bb2 e6 5. Be2 Bd6 6. O-O Nbd7 7. d3 O-O 8. c4 c6 9. Nc3 Qe7 10. Nh4 Bg6 11. Nxg6 hxg6 12. a3 g5 13. d4 g6 14. Qc2 Rac8 15. g3 e5 16. dxe5 Nxe5 17. cxd5 cxd5 18. Qd1 Qe6 19. Bf3 Qf5 20. Be2 Rfd8 21. Nxd5 Nxd5 22. Qxd5 Bb8 23. Qxb7 Rd2 24. e4 Qh3 25. Bxe5 Bxe5 26. Bc4 Rc7 27. Qb4 Rd8 28. Rad1 Re8 29. Qd2 Kg7 30. f3 Rh8 31. Qg2 Qc8 32. Rd5 Bf6 33. Qe2 Be7 34. Qb2+ Kg8 35. Rfd1 Qf8 36. Rd7 Rxd7 37. Rxd7 Rh7 38. Qd2 Rg7 39. b4 Qe8 40. Qd5 Kf8 41. Rxa7 |
| ECO A05 in 1984 play it! nielsen jens defeats black's arnason jon in 111 moves | 1. Nf3 Nf6 2. d4 e6 3. c4 b6 4. Nc3 Bb4 5. Qb3 a5 6. Bg5 Bb7 7. e3 h6 8. Bxf6 Qxf6 9. Be2 d6 10. O-O Bxc3 11. Qxc3 Nd7 12. Nd2 e5 13. Bf3 Bxf3 14. Nxf3 e4 15. Nd2 Qe7 16. Qc2 Nf6 17. c5 bxc5 18. dxc5 O-O 19. cxd6 cxd6 20. Rac1 Rfb8 21. Rfd1 Rb5 22. Qc6 Rab8 23. b3 Kh7 24. Nc4 d5 25. Nd6 Rb4 26. Nf5 Qe5 27. Nd4 R8b7 28. h3 Qh5 29. Qa6 a4 30. a3 R4b6 31. Qxa4 Nd7 32. b4 Rg6 33. Kh1 Ne5 34. Qc2 Rbb6 35. Qe2 Qg5 36. f4 exf3 37. Nxf3 Nxf3 38. Qxf3 Rbf6 39. Rxd5 Qh4 40. Rf5 Rd6 41. Rxf7 Rd2 42. Rf4 Qd8 43. Rd4 Rxd4 44. exd4 Qxd4 45. Rd1 Qe5 46. a4 Rg3 47. Qd5 Qf4 48. b5 Qb4 49. Qf5+ Rg6 50. Qc2 h5 51. Rb1 Qe7 52. b6 Qb7 53. a5 Kh6 54. a6 Qxa6 55. Qxg6+ Kxg6 56. b7 |
| ECO A05 in 1982 play it! nielsen jens defeats black's hoi carsten in 81 moves | 1. Nf3 Nf6 2. d4 d5 3. c4 e6 4. Nc3 Be7 5. Bf4 O-O 6. e3 Nbd7 7. Bd3 a6 8. cxd5 exd5 9. O-O c6 10. h3 Re8 11. Bh2 Nf8 12. Rb1 Ng6 13. Ne5 Bd6 14. f4 c5 15. Kh1 b5 16. a3 Bb7 17. Qf3 c4 18. Bc2 Bc7 19. g4 Nh4 20. Qf2 Ne4 21. Nxe4 dxe4 22. Bg3 Ng6 23. g5 Qd5 24. Rbd1 Bxe5 25. dxe5 Qc5 26. Rd6 Rad8 27. Rfd1 Rxd6 28. exd6 Rd8 29. Qd2 Nf8 30. Kh2 Nd7 31. Qc3 Qf5 32. Rd4 h5 33. gxh6 gxh6 34. Bh4 Re8 35. Bd1 h5 36. Be7 Kh7 37. Qe1 Rg8 38. Qh4 Kg7 39. Rd2 Nf8 40. d7 Nxd7 41. Bxh5 |
| ECO A04 in 1981 play it! nielsen jens defeats black's dobosz henryk in 65 moves | 1. Nf3 b5 2. e4 Bb7 3. Bxb5 Bxe4 4. O-O Nf6 5. d4 e6 6. c4 Be7 7. Nc3 Bb7 8. Re1 O-O 9. Ba4 Ba6 10. b3 Bb7 11. a3 a5 12. Rb1 Na6 13. Ne5 c6 14. Re3 Qc7 15. Rg3 Kh8 16. Rh3 d6 17. Ng4 Ng8 18. Ne2 e5 19. Qc2 f5 20. c5 Rae8 21. Bb2 e4 22. Nf4 Nf6 23. Ne6 Qc8 24. Nxf8 fxg4 25. Ng6+ Kg8 26. Nxe7+ Rxe7 27. cxd6 Rd7 28. Re3 Rxd6 29. b4 axb4 30. axb4 Nxb4 31. Qc5 Qe6 32. Qxb4 Nd5 33. Qxb7 |
| ECO A05 in 1994 play it! nielsen jens defeats black's pedersen jan in 69 moves | 1. Nf3 Nf6 2. d4 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. Nc3 Nbd7 7. e4 e5 8. h3 c6 9. a4 a5 10. Re1 Re8 11. Be3 Qc7 12. Qd2 exd4 13. Nxd4 Nc5 14. Bf4 Nh5 15. Bh6 Bxh6 16. Qxh6 Ne6 17. Nde2 Qb6 18. Qd2 Qc5 19. Rad1 Rd8 20. Rf1 b6 21. Kh2 Ba6 22. f4 f5 23. exf5 gxf5 24. g4 Bxe2 25. Nxe2 Nhg7 26. Ng3 Rac8 27. c3 Rf8 28. Qxd6 Qc4 29. gxf5 Nxf5 30. Nxf5 Rxf5 31. b3 Qxb3 32. Bd5 Qc2+ 33. Kh1 Rf6 34. Bxe6+ Kh8 35. Qe5 |
| ECO A04 in 1992 play it! nielsen jens defeats black's aarland stein in 77 moves | 1. Nf3 c5 2. e4 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. O-O Nc6 6. Re1 e6 7. c4 Be7 8. d4 cxd4 9. Nxd4 Nf6 10. Nc3 O-O 11. Bg5 Rfd8 12. Rc1 Rac8 13. b3 Qe8 14. Nf3 Rd7 15. Qe2 Qd8 16. Rcd1 h6 17. Bc1 Qa5 18. Bb2 Rcd8 19. a3 a6 20. b4 Qc7 21. Rc1 Qb8 22. Rc2 Ng4 23. b5 Na5 24. Nd2 Ne5 25. f4 Ng6 26. g3 Rc8 27. a4 Rdc7 28. Nd1 Nf8 29. Qg4 f6 30. Ne3 Qa7 31. Kg2 Qc5 32. f5 e5 33. Nd5 Rd7 34. Re3 Bd8 35. Rd3 Qa7 36. Ba3 Qb8 37. Bb4 Kh8 38. Qh5 Bc7 39. b6 |
| ECO A04 in 1984 play it! nielsen jens defeats black's bielczyk jacek in 77 moves | 1. Nf3 g6 2. e4 Bg7 3. d4 d6 4. Nc3 Nf6 5. Be2 O-O 6. O-O Bg4 7. h3 Bxf3 8. Bxf3 Nc6 9. Ne2 e5 10. c3 h6 11. Qb3 Rb8 12. Be3 exd4 13. cxd4 Re8 14. Qd3 Nh7 15. g3 Ng5 16. Bg2 Qe7 17. Nc3 Ne6 18. d5 Ne5 19. Qe2 Nc5 20. Bxc5 dxc5 21. f4 Nd7 22. e5 c6 23. dxc6 bxc6 24. Bxc6 Rec8 25. Bd5 Nb6 26. Bg2 Rd8 27. Rfd1 Rd4 28. a3 Qe6 29. Nb5 Rxd1+ 30. Rxd1 Na4 31. Rd2 Qb3 32. Nd6 Nxb2 33. Kh2 Na4 34. Bd5 Nc3 35. Bxb3 Nxe2 36. Bxf7+ Kh7 37. Rxe2 Rb6 38. Nc4 Rb3 39. e6 |
| ECO A05 in 1977 play it! nielsen jens defeats black's stempin pawel in 83 moves | 1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. O-O O-O 5. c4 Nc6 6. Nc3 d6 7. d4 a6 8. Bg5 h6 9. Bd2 Rb8 10. Rc1 e5 11. d5 Ne7 12. e4 Nd7 13. b4 f5 14. Ne1 Nf6 15. Nd3 fxe4 16. Nxe4 Nxe4 17. Bxe4 Bh3 18. Re1 Nf5 19. f4 h5 20. Nf2 Bg4 21. Nxg4 hxg4 22. Qxg4 Qf6 23. Bc3 Rbe8 24. fxe5 dxe5 25. Rf1 Kh7 26. Bd2 Bh6 27. Bxh6 Kxh6 28. h4 b6 29. Rf2 Qe7 30. Rcf1 Rg8 31. Rf3 Ref8 32. Kh2 Rg7 33. c5 bxc5 34. bxc5 Rff7 35. R1f2 Rf8 36. d6 cxd6 37. cxd6 Qxd6 38. Qg5+ Kh7 39. g4 Qb4 40. gxf5 Qxe4 41. fxg6+ Rxg6 42. Qe7+ |
| ECO A05 in 1979 play it! nielsen jens defeats black's rodgaard john in 61 moves | 1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. O-O e6 5. d3 Be7 6. Nbd2 O-O 7. e4 d6 8. Ng5 Ne8 9. Nh3 c5 10. f4 Nc7 11. g4 f5 12. Kh1 d5 13. exf5 exf5 14. gxf5 Rxf5 15. Nc4 Nc6 16. Ne3 Rf8 17. Qh5 g6 18. Qh6 d4 19. f5 dxe3 20. Bxe3 Qd7 21. fxg6 Bd6 22. Ng5 Qg7 23. gxh7+ Kh8 24. Qxd6 Nb5 25. Qg3 Ncd4 26. Bxb7 Qxb7+ 27. Ne4 Nxc2 28. Rg1 Rae8 29. Raf1 Qe7 30. Bh6 Rxf1 31. Qg8+ |
| ECO A04 in 1979 play it! nielsen jens defeats black's fuglsang flemmin in 81 moves | 1. Nf3 c5 2. g3 Nc6 3. c4 g6 4. Bg2 Bg7 5. O-O e6 6. Nc3 Nge7 7. d3 O-O 8. Bd2 b6 9. Rb1 Bb7 10. a3 d6 11. b4 Qd7 12. Qa4 Rfd8 13. Rfc1 h6 14. e3 Kh7 15. Rd1 Qc8 16. Be1 Nf5 17. Ne2 Ne5 18. e4 Nxf3+ 19. Bxf3 Nd4 20. Nxd4 Bxd4 21. Qb3 e5 22. Bg2 Bc6 23. b5 Bd7 24. Bc3 Bxc3 25. Qxc3 g5 26. Rb2 Rg8 27. Rdb1 Be6 28. a4 Rb8 29. a5 f6 30. Qa3 Rg7 31. Ra1 Kg6 32. axb6 axb6 33. Rba2 h5 34. Qc1 Rh7 35. f4 Bd7 36. Ra7 Rb7 37. fxg5 fxg5 38. h4 gxh4 39. gxh4 Rh6 40. Qg5+ Kh7 41. Qe7+ |
| ECO A34 in 1980 play it! nielsen jens defeats black's stoll j in 123 moves | 1. c4 c5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nc7 6. Nf3 Nc6 7. O-O g6 8. d3 Bg7 9. Bd2 O-O 10. a3 b6 11. Rb1 a5 12. b3 Bd7 13. Ne1 Rc8 14. Nc2 Nd4 15. Ne3 Ncb5 16. Nxb5 Nxb5 17. a4 Nd4 18. Re1 Bc6 19. Nc4 Bxg2 20. Kxg2 Qd5+ 21. f3 Rc6 22. e3 Ne6 23. Qe2 Rd8 24. Red1 Qd7 25. Be1 Qb7 26. Rbc1 Rc7 27. g4 Rcd7 28. Bg3 Rd5 29. h3 Rf8 30. Kg1 Nd8 31. Na3 Nc6 32. Nb5 Rfd8 33. Rd2 Nb4 34. Rcd1 R5d7 35. e4 Qc6 36. Qe3 Bd4 37. Nxd4 cxd4 38. Qh6 Rc8 39. h4 Qf6 40. f4 Rdc7 41. Bf2 Rd7 42. f5 Rc6 43. Kg2 Qg7 44. Qf4 Qf6 45. g5 Qd6 46. Qf3 Rc3 47. Bg3 Qc6 48. Rf1 Rxb3 49. fxg6 Qxg6 50. h5 Qg7 51. Qf5 Rd8 52. Be5 f6 53. Qe6+ Qf7 54. Qg4 Qg7 55. Kh1 Nxd3 56. Bc7 Rf8 57. Qd1 Rc3 58. gxf6 Qf7 59. Qg4+ Kh8 60. Qg7+ Qxg7 61. fxg7+ Kxg7 62. h6+ |
| ECO A15 in 1976 play it! nielsen jens defeats black's morris in 65 moves | 1. c4 Nf6 2. g3 g6 3. Bg2 Bg7 4. Nf3 O-O 5. O-O d6 6. Nc3 e5 7. d3 Nc6 8. Rb1 Nh5 9. b4 f5 10. b5 Ne7 11. Qc2 f4 12. Ba3 h6 13. c5 g5 14. cxd6 cxd6 15. Ne4 g4 16. Nh4 Bf6 17. Nxd6 Bxh4 18. Nxc8 Rxc8 19. Qb3+ Kg7 20. gxh4 Qd7 21. Be4 g3 22. fxg3 fxg3 23. Qb4 Rxf1+ 24. Rxf1 g2 25. Rf2 Nf4 26. Rxf4 exf4 27. Qxe7+ Qxe7 28. Bxe7 Rc2 29. Kxg2 Rxe2+ 30. Kf3 Rxa2 31. Bxb7 Rb2 32. Bc6 Rb3 33. Bc5 |
| ECO A01 in 1983 play it! nielsen jens defeats black's hess christian in 113 moves | 1. b3 d5 2. Bb2 Nf6 3. e3 c6 4. Nf3 g6 5. Be2 Bg7 6. O-O O-O 7. c4 Bg4 8. d3 Bxf3 9. Bxf3 Re8 10. d4 e6 11. Nc3 Nbd7 12. Qc2 Rc8 13. Rfd1 Qe7 14. Rac1 a6 15. Qd2 Red8 16. Rc2 h5 17. Qc1 Nf8 18. Ba3 Qc7 19. g3 N8h7 20. Bg2 Qb8 21. Na4 Re8 22. Nc5 Rcd8 23. Bb2 Ng5 24. b4 Nge4 25. Nd3 Nd6 26. c5 Nf5 27. a4 h4 28. Ne5 hxg3 29. hxg3 Nd7 30. Qa1 Qc7 31. Bc3 Bf6 32. Ng4 Bg7 33. b5 axb5 34. axb5 Ra8 35. Qb2 Ra4 36. b6 Qb8 37. Ra1 Nxc5 38. dxc5 Bxc3 39. Rxc3 Rxg4 40. Rca3 Rc4 41. Ra5 Qd8 42. Bf1 Rg4 43. Be2 Re4 44. Bd3 Rg4 45. Qe5 Nh4 46. Be2 Re4 47. Qd6 Nf5 48. Qxd8 Rxd8 49. Ra8 Rxa8 50. Rxa8+ Kg7 51. Ra7 d4 52. g4 Nxe3 53. fxe3 Rxe3 54. Kf2 Rc3 55. Rxb7 d3 56. Bxd3 Rxd3 57. Rc7 |
| ECO B30 in 1975 play it! nielsen jens defeats black's giaccomazzi domi in 53 moves | 1. e4 c5 2. Nf3 Nc6 3. Bb5 e6 4. O-O Nge7 5. d4 cxd4 6. Nxd4 Qb6 7. Nxc6 Nxc6 8. Nc3 Bc5 9. Bd3 Bb4 10. Qg4 O-O 11. Bh6 Qd4 12. Ne2 f5 13. Qg3 Qf6 14. Bg5 Qf7 15. exf5 exf5 16. Rad1 d5 17. c3 Ba5 18. Bc2 Kh8 19. Bb3 Be6 20. Nd4 Bc7 21. Qxc7 Qxc7 22. Nxe6 Qf7 23. Nxf8 Rxf8 24. Rxd5 Qh5 25. Be3 Qh4 26. Bc5 Rf6 27. Be7 |
| ECO B91 in 1980 play it! nielsen jens defeats black's jensen vagn in 65 moves | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 Nc6 7. Bg2 Bd7 8. O-O e6 9. Nde2 b5 10. b3 Be7 11. h3 O-O 12. Kh1 Rc8 13. f4 Qb6 14. g4 d5 15. exd5 Nxd5 16. Nxd5 exd5 17. Nc3 d4 18. Nd5 Qd8 19. f5 Bc5 20. Bf4 Re8 21. b4 Bf8 22. Qd2 f6 23. Rad1 Ne5 24. Qxd4 Rxc2 25. Ne3 Rc7 26. g5 Qc8 27. gxf6 gxf6 28. Nd5 Rc4 29. Qa7 Bxf5 30. Nxf6+ Kh8 31. Nxe8 Qxe8 32. Bxe5+ Qxe5 33. Rd5 |
| ECO B42 in 1983 play it! nielsen jens defeats black's quist viggo in 67 moves | 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Bc5 6. Nb3 Ba7 7. Nc3 Nc6 8. h4 b5 9. Qe2 d6 10. Bg5 f6 11. Be3 Nge7 12. Qh5+ Ng6 13. Bxa7 Rxa7 14. f4 O-O 15. Qf3 Nb4 16. O-O-O Qe7 17. Bf1 Rc7 18. h5 Nh8 19. a3 Nc6 20. h6 g6 21. Qf2 f5 22. exf5 gxf5 23. Rh3 Ng6 24. Re3 Qd8 25. g3 b4 26. axb4 Nxb4 27. Ree1 e5 28. Kb1 exf4 29. gxf4 Qf6 30. Rd4 Rb7 31. Rxb4 Rxb4 32. Nd5 Qf7 33. Nxb4 Be6 34. Qd4 |
| ECO B50 in 1977 play it! nielsen jens defeats black's bjerring kai in 93 moves | 1. e4 c5 2. Nf3 d6 3. d3 Nc6 4. g3 g6 5. Bg2 Bg7 6. O-O e5 7. c3 Nge7 8. a3 O-O 9. b4 a6 10. Nbd2 cxb4 11. axb4 Rb8 12. Qb3 d5 13. exd5 Nxd5 14. Ne4 Nc7 15. Be3 Ne6 16. Rfd1 Kh8 17. b5 axb5 18. Qxb5 f5 19. Neg5 Nxg5 20. Bxg5 Qe8 21. Be3 Bd7 22. Qc4 Be6 23. Qh4 Bf6 24. Bg5 Qe7 25. Re1 Bxg5 26. Nxg5 Bg8 27. Rab1 Rbe8 28. Rb5 Qg7 29. Reb1 Re7 30. Rc5 Qf6 31. Rb6 Qd6 32. Rcb5 Qxd3 33. Rxb7 Qd1+ 34. Bf1 Qd6 35. R5b6 Rc7 36. Rxc7 Qxc7 37. Bc4 h5 38. Ra6 Ne7 39. Bxg8 Rxg8 40. Ne6 Qd7 41. Qf6+ Kh7 42. Rd6 Qb7 43. Rb6 Qa7 44. Rd6 f4 45. Qxe5 fxg3 46. hxg3 Nf5 47. Ng5+ |
| ECO B40 in 1993 play it! nielsen jens defeats black's petersen peter in 71 moves | 1. e4 c5 2. Nf3 e6 3. Nc3 Nc6 4. Bb5 Nge7 5. O-O a6 6. Bxc6 Nxc6 7. d4 cxd4 8. Nxd4 Be7 9. Nxc6 bxc6 10. e5 O-O 11. Ne4 f6 12. c4 Qa5 13. exf6 gxf6 14. Bh6 Rf7 15. c5 Bxc5 16. Qg4+ Kh8 17. Bd2 Qb5 18. a4 Qd3 19. Rfd1 Be7 20. Bc3 Qc2 21. Rac1 Qb3 22. Rd3 Rg7 23. Qf3 e5 24. Bxe5 Qxd3 25. Qxd3 fxe5 26. Nd6 a5 27. Nxc8 Rxc8 28. Qxd7 Rf8 29. Qxc6 Bb4 30. Qd5 Re7 31. f3 Rfe8 32. Rc4 Kg7 33. g3 Re6 34. Rc7+ Kh6 35. Qe4 Be7 36. f4 |
| ECO B52 in 1993 play it! nielsen jens defeats black's tanggaard hans in 71 moves | 1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Nxd7 5. O-O Ngf6 6. Qe2 e6 7. b3 Be7 8. Bb2 O-O 9. c4 e5 10. Nc3 Nb8 11. Ne1 Nc6 12. Nc2 Nd4 13. Nxd4 exd4 14. Nd5 Nxd5 15. cxd5 f5 16. exf5 Rxf5 17. Qe6+ Rf7 18. f4 Bf6 19. g4 g6 20. Rae1 Bh4 21. Re2 Qf6 22. d3 Kg7 23. Qxf6+ Bxf6 24. Re6 Raf8 25. Bc1 Bg5 26. Re4 b6 27. Kg2 Bd8 28. Rfe1 h6 29. h3 g5 30. f5 Bf6 31. Re6 Be5 32. h4 Bf6 33. hxg5 hxg5 34. Bxg5 Bxg5 35. Rg6+ Kh8 36. Rxg5 |