Author: John Merlino
Date: 18:10:35 01/29/03
Go up one level in this thread
On January 29, 2003 at 20:16:13, Mike Byrne wrote: > against Pocket Fritz 1.0 - not a great test position because b6 also wins, I >played the sac Bxa7 ... > > >[d]1kq1r2r/ppp2ppp/2P1p3/PPBp4/3Pn3/1Q6/3bB1PP/RR4K1 w - - 0 1 Yes, b6 definitely wins. Chessmaster 9000, on a P3-733, finds this move in one second, but doesn't see the big win until 1:31. Time Depth Score Positions Moves 0:00 1/5 -1.23 26258 1.cxb7 Qxb7 2.a6 Nxc5 3.dxc5 Qc8 4.Qg3 0:01 1/5 -1.11 41331 1.b6 Nxc5 2.dxc5 cxb6 3.axb6 Qxc6 4.bxa7+ Ka8 0:03 1/6 -0.63 177068 1.b6 cxb6 2.axb6 a5 3.c7+ Ka8 4.Bb4 Bxb4 5.Qxb4 0:04 1/7 0.48 299511 1.b6 cxb6 2.axb6 Qxc6 3.Bb5 Qc8 4.Bxe8 Rxe8 5.bxa7+ Ka8 0:07 1/8 0.48 481150 1.b6 cxb6 2.axb6 Qxc6 3.Bb5 Qc8 4.Bxe8 Rxe8 5.bxa7+ Ka8 0:16 1/9 0.05 1241729 1.b6 cxb6 2.axb6 Qxc6 3.Bb5 Qc8 4.Bxe8 Rxe8 5.bxa7+ Ka8 6.Bb4 1:31 1/10 3.64 7073228 1.b6 cxb6 2.axb6 Qxc6 3.Bb5 Qc8 4.Rxa7 Nxc5 5.Qa3 Na6 6.Qd6+ Nc7 7.bxc7+ Qxc7 8.Rxb7+ Kxb7 9.Ba6+ Ka8 10.Qxc7 2:36 2/11 4.22 12779684 1.b6 cxb6 2.axb6 Qxc6 3.Bb5 a5 4.Bxc6 bxc6 5.Qd3 Kb7 6.Ra2 Bc3 7.Rc2 After forcing Bxa7, it says: Time Depth Score Positions Moves 0:00 1/3 -3.12 492 1...Kxa7 2.b6+ Ka8 3.bxc7 bxc6 0:00 1/4 -1.66 2995 1...Kxa7 2.b6+ Kb8 3.bxc7+ Qxc7 4.Qxb7+ Qxb7 5.Rxb7+ Ka8 6.Rxf7 0:00 1/5 -2.20 10675 1...Kxa7 2.b6+ Kb8 3.cxb7 Qd7 4.a6 c5 5.dxc5 Nxc5 0:00 1/6 -0.63 48470 1...Kxa7 2.b6+ Kb8 3.a6 cxb6 4.Qxb6 Be3+ 5.Kh1 Re7 6.Qa7+ Kxa7 7.axb7+ Kb8 8.bxc8=Q+ Kxc8 9.Ra8+ Kc7 10.Rxh8 Bxd4 0:01 1/6 -1.15 89541 1...Ka8 2.b6 Bc3 3.cxb7+ Qxb7 4.Ra4 e5 5.a6 0:02 1/7 -0.57 216404 1...Ka8 2.b6 cxb6 3.cxb7+ Qxb7 4.Bxb6 Qc6 5.a6 Rb8 0:06 1/8 -0.55 499674 1...Ka8 2.b6 cxb6 3.cxb7+ Qxb7 4.Bxb6 Nc3 5.Bb5 Nxb1 6.Bxe8 Rxe8 7.Rxb1 0:27 1/9 -0.22 2230136 1...Ka8 2.Qd3 Bc3 3.Ra2 e5 4.Bc5 Nxc5 5.cxb7+ Qxb7 6.Qxc3 Ne4 0:50 1/10 -0.22 4091680 1...Ka8 2.Qd3 Bc3 3.Ra2 e5 4.Bc5 Nxc5 5.cxb7+ Qxb7 6.Qxc3 Ne4 5:35 2/11 1.50 26384352 1...Ka8 2.Bc5 Nxc5 3.dxc5 Qd8 4.b6 Qe7 5.a6 Qxc5+ 6.Kh1 cxb6 7.axb7+ Kb8 8.Ra8+ Kc7 9.Qg3+ e5 10.Qxe5+ Rxe5 11.Rxh8 Re8 12.Rxe8 17:34 3/12 3.12 84587214 1...Ka8 2.Bc5 Nxc5 3.dxc5 Qd8 4.cxb7+ Kb8 5.a6 Qg5 6.Qa2 Qe3+ 7.Kh1 Qxc5 8.Qxd2 f6 9.Rc1 Qf2 jm
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