Author: John Merlino
Date: 09:55:08 04/09/04
Go up one level in this thread
On April 08, 2004 at 23:46:12, Dan Ellwein wrote: >On April 08, 2004 at 23:39:50, John Merlino wrote: > >>On April 08, 2004 at 22:15:00, scott farrell wrote: >> >>>This position arose on ICC Goona vs Chompsterx >>> >>>here white has an attack coming, with a bishop sac on g6, and black's pieces are >>>woefully out of position to defend. While white can poure more pieces in. >>> >>>The obvious move is g6, but chompster and crafty see black is still winning >>>until some depth, where they realise white is winning. >>> >>>I had cm9000 look at it for a few minutes on a PIII850 and it still says g6, but >>>says white is winning by the smallest of margins. >>> >>>As far as I can see its lost for black. >>> >>>I am interested in what other engines think. >>> >>>[d]r4rk1/p2b1ppp/1qn2P2/3pP3/2pP4/b1P1BN1P/P1B2Q2/R4NK1 b - - 0 23 >>> >>>as you can see below crafty takes about 12 plies to see its in trouble, and 14 >>>plies and overnight to see ne7. >>> >>>I am unsure if ne7 is a better move >> >>The CM_SKR personality of Chessmaster 9000, on an AMD 1800+, switches from g6 to >>Ne7 in about 90 seconds. >> >>Time Depth Score Positions Moves >>0:00 1/3 -1.60 2528 23...g6 24.Rb1 Bb2 25.Ba4 >>0:00 1/4 -1.71 24215 23...g6 24.Rb1 Qa5 25.Bh6 Qxc3 >> 26.Bxf8 Rxf8 >>0:00 1/5 -1.58 74717 23...g6 24.Bh6 Rfb8 25.Ne3 Qa5 >>0:00 1/6 -1.65 111608 23...g6 24.Qh4 h5 25.Rb1 Bb2 26.Ba4 >>0:01 1/7 -0.85 202273 23...g6 24.Qh4 Rfb8 25.Ng5 h5 26.e6 >> Be8 27.exf7+ Bxf7 28.Nxf7 Kxf7 >>0:03 1/8 -1.19 518286 23...g6 24.Qh4 Rfb8 25.Ng5 h5 26.e6 >> Bxe6 27.Nxe6 Qb2 28.Rc1 fxe6 29.Bxg6 >> >>0:07 1/9 0.30 1307872 23...g6 24.Qh4 Rfc8 25.Bxg6 fxg6 >> 26.f7+ Kxf7 27.Qxh7+ Ke8 28.Qg8+ >> Bf8 29.Bh6 Kd8 30.Qxf8+ Kc7 >>1:03 1/10 0.64 12174030 23...g6 24.Qh4 Rfb8 25.Bxg6 fxg6 >> 26.f7+ Kxf7 27.Qxh7+ Ke8 28.Qg8+ >> Bf8 29.Bh6 Bxh3 30.Qxf8+ Kd7 31.Qd6+ >> Kc8 32.Qxd5 Qa6 >>1:32 1/10 0.26 19539768 23...Ne7 24.Bc1 Qa6 25.Bxa3 Qxa3 >> 26.fxe7 Qxe7 27.Ne3 Be6 28.Qh4 >> Qxh4 29.Nxh4 Rab8 30.Rb1 Rxb1+ >> 31.Bxb1 Rb8 >>3:16 1/11 0.60 44098576 23...Ne7 24.Bc1 Bxc1 25.fxe7 Rfe8 >> 26.Rxc1 h6 27.Ne3 Qa5 28.Rb1 Bc6 >> 29.Ng4 Rxe7 >> >>jm > >The CM_OFFSET personality of Chessmaster 9000, on an P3 850, switches from g6 to >Ne7 in about 6 minutes. > >Then at about 28 minutes realizes that black is not winning... > >Time Depth Score Positions Moves >0:00 1/3 -2.35 3075 1...Bb2 2.Qh4 g6 3.Qh6 >0:00 1/3 -2.61 4706 1...Qb2 2.fxg7 Qxa1 3.gxf8=Q+ Rxf8 > 4.Qh4 >0:00 1/4 -0.91 19069 1...Qb2 2.Bxh7+ Kh8 3.Qh4 g5 4.Qxg5 >0:00 1/4 -2.54 21234 1...g6 2.Qh4 h5 3.Rb1 >0:00 1/5 -2.44 57482 1...g6 2.Qh4 h5 3.Rb1 Bb2 4.Ba4 >0:01 1/6 -2.53 103363 1...g6 2.Qh4 Rfb8 3.Ng5 h5 4.e6 > Be8 5.exf7+ Bxf7 6.Nxf7 Kxf7 >0:03 1/7 -2.35 233345 1...g6 2.Rb1 Qa5 3.Qh4 Rfb8 4.Qh6 > Bf8 >0:10 1/8 -2.73 878303 1...g6 2.Qh4 Rfb8 3.Ng5 h5 4.e6 > Bxe6 5.Nxe6 Qb2 6.Rc1 fxe6 7.Bxg6 >0:19 1/9 -2.20 1686037 1...g6 2.Qh4 Rfb8 3.Bxg6 fxg6 4.f7+ > Kxf7 5.Qxh7+ Ke8 6.Qh8+ Bf8 7.Bh6 > Bxh3 8.Qxf8+ Kd7 >1:20 1/10 -1.14 7158345 1...g6 2.Qh4 Rfb8 3.Ng5 h5 4.Nxf7 > Qb2 5.Bxg6 Bxh3 6.Qxh3 Qxa1 7.Qxh5 >6:03 1/10 -1.31 33217927 1...Ne7 2.Ng5 h6 3.Nh7 Rfd8 4.fxg7 > Kxg7 5.Nf6 Kh8 6.Nxd7 Rxd7 7.Qxf7 > Rg8+ 8.Kh2 >14:32 1/11 -1.31 80860146 1...Ne7 2.Ng5 h6 3.Nh7 Rfd8 4.fxg7 > Kxg7 5.Nf6 Kh8 6.Nxd7 Rxd7 7.Qxf7 > Rg8+ 8.Kh2 >28:00 1/12 -0.98 155400611 1...Ne7 2.Ng5 h6 3.Nh7 Rfd8 4.fxg7 > Kxg7 5.Nf6 Ng6 6.Nh5+ Kg8 7.Nf6+ > Kh8 8.Nxd5 Qe6 >Dan CM_SKR on my comp sees that Black is not winning in 7 seconds.... jm
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.