Author: Dan Ellwein
Date: 14:22:26 04/09/04
Go up one level in this thread
On April 09, 2004 at 12:55:08, John Merlino wrote: >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 that is good! CM_SKR is clearly better in this position than CM_OFFSET... Dan
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