Author: John Merlino
Date: 11:16:28 11/27/02
Go up one level in this thread
On November 27, 2002 at 10:52:09, bobby palacios wrote: >[D] r3qrk1/pp1b3p/1nn1pbp1/3p2N1/3P4/2N5/PPB2PPP/R1BQR1K1 w - - 0 17 > > >Here is a position that occured in a game between Ruffian vs Hiarcs 7.32 at game >in 25. Ruffian won the game with a brilliant attack, but does Hiarcs 7.32 have >better defensive moves? > >The game continued: > >17. Nxh7 Kxh7 18.Qh5+ Kg8 19.Bxg6 Qe7 20.Re3 Be8 21.Rg3 Bxg6 22.Rxg6+ Bg7 >23. Bh6 Rf5 24. Qg4 Rf7 25. Re1 e5 26. Qh5 Qe8 27.Nb5 Nc4 28. b3 a6 29. Nc3 Nb6 >30. dxe5 Re7 31. Qg5 Qf8 32. Re3 Nd4 33. Rxb6 Rc8 34. Rf6 Qe8 35. Rg6 Qf8 >36. Bxg7 Rxg7 37. Qh5 Rxg6 38. Qxg6+ 1-0 Chessmaster 9000, on a P3-733, does not see it, preferring either Nf3 or Be3: Time Depth Score Positions Moves 0:00 1/3 0.13 1366 17.Nf3 Bg7 18.Bg5 Nc4 0:00 1/4 0.14 5451 17.Nf3 Qf7 18.Nb5 Nc4 19.Qe2 0:00 1/5 -0.09 19940 17.Nf3 Qf7 18.Nb5 Nc4 19.Qe2 Bg7 0:01 1/6 0.24 62333 17.Nf3 Bg7 18.Nb5 Qe7 19.Bg5 Qb4 0:02 1/7 -0.07 126537 17.Nf3 Bg7 18.Nb5 Qe7 19.Qe2 Qb4 20.a3 0:07 1/8 -0.03 452621 17.Nf3 Bg7 18.Nb5 Qb8 19.Bg5 a6 20.Na3 Qd6 21.Qd3 0:11 1/8 0.00 674644 17.Be3 Qe7 18.Nf3 Bg7 19.Rc1 Rac8 20.Bg5 Qb4 0:25 1/9 -0.05 1588702 17.Be3 Qe7 18.Nf3 Qb4 19.Bb3 Nc4 20.Bh6 Rfe8 21.a3 1:05 1/10 0.00 4227497 17.Be3 Qe7 18.Nf3 Bg7 19.b3 Qb4 20.Ne2 e5 21.dxe5 Nxe5 22.Nxe5 Bxe5 3:11 2/11 -0.12 12934656 17.Be3 Qe7 18.Nf3 Qb4 19.Qd3 Rac8 20.Reb1 Bg7 21.a3 Qe7 22.Rc1 4:52 2/11 0.02 19308810 17.Nf3 Bg7 18.Bb3 Rf5 19.Be3 Rc8 20.Ne2 Nc4 21.Bxc4 dxc4 22.Ng3 Rd5 23.Ne4 A little move-forcing seems to indicate that the default personality would need to get to depth 14-15 to see the move. As for HIARCS' defense, perhaps 20...Be8 was bad? CM prefers 20...Bxd4 with a draw score: Time Depth Score Positions Moves 0:00 1/3 -1.90 2299 20...Bxd4 21.Rf3 Rxf3 22.Qxf3 0:00 1/4 -1.55 7707 20...Bxd4 21.Re2 a6 22.Bg5 0:00 1/5 -1.00 34867 20...Bxd4 21.Rh3 Rxf2 22.Be3 Bxc3 23.Bxf2 Bxb2 0:02 1/6 0.00 140335 20...Bxd4 21.Rh3 Bxc3 22.Bh7+ Kh8 23.Bd3+ Kg8 24.Bh7+ 0:02 1/6 -0.12 173881 20...Be8 21.Rg3 Bxg6 22.Qxg6+ Bg7 23.Bh6 Rf7 24.Bxg7 Rxg7 0:04 1/7 -0.23 339278 20...Be8 21.Rg3 Bxg6 22.Rxg6+ Bg7 23.Bh6 Rf7 24.Bxg7 Rxg7 25.Rd1 Rxg6 26.Qxg6+ Kh8 0:07 1/8 0.19 580996 20...Be8 21.Rg3 Bxg6 22.Rxg6+ Bg7 23.Bh6 Rf7 24.Bxg7 Rxg7 25.Rh6 Rh7 0:10 1/8 0.00 756638 20...Bxd4 21.Rh3 Bxf2+ 22.Kh1 Qg7 23.Bh7+ Kh8 24.Bd3+ Kg8 25.Bh7+ 0:25 1/9 0.00 2037716 20...Bxd4 21.Rh3 Be5 22.Bh7+ Kh8 23.Bd3+ Kg8 24.Bh7+ 0:49 1/10 0.00 4178484 20...Bxd4 21.Rh3 Be5 22.Bh7+ Kh8 23.Bd3+ Kg8 24.Bh7+ 2:34 2/11 0.00 13387871 20...Bxd4 21.Rh3 Be8 22.Bh7+ Kh8 23.Bg6+ Kg8 Somebody will need to do better analysis of this position, as my machine is just too slow these days.... :-( [D]r4rk1/pp1bq3/1nn1pbB1/3p3Q/3P4/2N1R3/PP3PPP/R1B3K1 b - - 0 4 Following the actual moves that were played, CM starts to see trouble quickly after 23.Bh6. That's when the evals go above 1.0.... jm
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