Author: Dan Ellwein
Date: 20:46:12 04/08/04
Go up one level in this thread
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
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