Author: Joshua Haglund
Date: 01:17:25 11/28/02
Go up one level in this thread
On November 27, 2002 at 14:16:28, John Merlino wrote: >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 I find that in Crafty v16.19, that if you crank up the evaluation tropism to an insane number, it'll find Nxh7 right away. Not mate by far but just an insane guess. In a normal situation it finds Nf3 Bg7 -39. Joshua toneewa@yahoo.com
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.