After looking at the game it seems Nightmare missed 41.. RxNd5 and the knight fork 42.. Nc6 in his calculations, this is probably pruned away or too far ahead, that's why it played a bad move earlier on. When it saw the position declining, it was already too late to do something about it.jdart wrote:Nightmare also did very well. I think it was leading until this loss to Goldbar in round 4:
[pgn]
[Event "CSVN 1st Internet Tournament"]
[Site "winboard.nl 5000"]
[Date "2014.05.11"]
[Round "4"]
[White "Goldbar"]
[Black "NightmareX"]
[Result "1-0"]
[TimeControl "2700"]
[ECO "B90 Sicilian, Najdorf, Byrne attack"]
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3 Be6 8. f3
h5 9. Qd2 Nbd7 10. Nd5 Bxd5 11. exd5 g6 12. Be2 Bg7 13. O-O O-O 14. Rac1 Qc7
15. c4 b6 16. h3 Rfe8 17. Rfe1 Kh7 18. Bf1 Rac8 19. Rcd1 a5 20. Qc3 Qb7 21. Bg5
Bh6 22. f4 Qc7 23. Kh1 Ng8 24. Qf3 a4 25. Nd2 f5 26. Nb1 Bxg5 27. fxg5 Qd8 28.
h4 b5 29. cxb5 Nb6 30. Qa3 Qc7 31. Nd2 e4 32. b3 axb3 33. axb3 Ra8 34. Qc1 Qxc1
35. Rxc1 Rad8 36. Nc4 Nxd5 37. b6 Rb8 38. b7 Nge7 39. Na5 Red8 40. Red1 Kg7 41.
Rxd5 Nxd5 42. Nc6 Ne7 43. Nxd8 Rxd8 44. Rc7 Kf8 45. b4 d5 46. Ba6 d4 47. Rd7
Re8 48. Rxd4 e3 49. Rd6 Rb8 50. Kg1 e2 51. Kf2 Kf7 52. Kxe2 Kf8 53. b5 Ke8 54.
Kf3 f4 55. Kxf4 Kf7 56. Rc6 Rxb7 57. Rf6+ Kg7 58. Bxb7 Ng8 59. Ke5 Nxf6 60.
gxf6+ Kh6 61. b6 g5 62. Be4 gxh4 63. b7 h3 64. b8=Q hxg2 65. Kf5 g1=Q 66. Qh8#
{Black checkmated} 1-0
[/pgn]
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