Author: Moritz Berger
Date: 12:24:32 07/23/98
Go up one level in this thread
On July 23, 1998 at 12:58:20, Robert Hyatt wrote: >The major move that Crafty didn't like was the Qh5+ move which traded the knight >on h8 for black's remaining two pawns. Crafty has specific eval code that says >if it is down a piece, even with three pawns for it, it isn't going to be happy >unless all the pieces are gone except for that one extra piece for the opponent. > >In every game I have ever played with a computer, being down a piece with a >couple of rooks bishops and queens on the board has resulted in the side that >is down a piece losing the game. I've tried to stop this. Perhaps here Qh5 >is a good move, but my eval dropped sharply after that. > >I thought that Rebel would win this after it had such a wall of pawns left on >the kingside, but it never seemed to try to get them moving, and a wall of pawns >on the 2nd/3rd ranks is not nearly so impressive as that same wall of pawns on >the 5th-6th... > >Interesting decision by Anand to start that Bd6 sequence. I analyzed the position with Shredder 2 on a PII-400 (96MB+32MB=128MB HT) Compare the evals for Qh5+ and Qh3, they're pretty close (I let Shredder do restricted searches on both moves). So Rebel isn't the only program that evalutes Qh5+ as playable: 9 -> 0:15.21 +1.89 Qh5+ g6 Qh3 cxd4 cxd4 Bxe4 O-O Bf5 Qh4 Rd8 (1.437.551) 9 -> 0:12.75 +1.88 Qh3 cxd4 cxd4 Bxe4 O-O Bf5 g4 Be4 Rfe1 (1.277.960) 10 -> 0:33.76 +1.85 Qh5+ g6 Qh3 cxd4 cxd4 O-O-O O-O Rxh8 g3 Qd6 gxf4 Bxe4 (3.240.704) 10 -> 0:36.51 +1.81 Qh3 cxd4 cxd4 Bxe4 O-O Bf5 Qh4 Kf8 g3 Kg8 Qxf4 (3.625.187) 11 -> 2:24.21 +1.61 Qh5+ g6 Nxg6 hxg6 Qxg6+ Qf7 Qxf7+ Kxf7 g3 Bh6 f3 Rd8 dxc5 Rc8 a4 (13.517.312) 11 -> 4:31.32 +1.76 Qh3 cxd4 cxd4 O-O-O O-O Rxh8 g3 Bh6 Qxe6+ Qd7 Qb6 Qc6 Qxc6+ (26.224.808) 12 -> 8:25.45 +1.58 Qh5+ g6 Nxg6 hxg6 Qxg6+ Qf7 Qxf7+ Kxf7 g3 Bh6 f3 Rd8 dxc5 Be3 (44.284.606) 12 -> 13:38.96 +1.64 Qh3 cxd4 cxd4 O-O-O O-O Rxh8 g3 Bh6 Qxe6+ Qd7 Qxd7+ Kxd7 (80.963.520)
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.