Author: John Merlino
Date: 08:34:23 12/20/02
Go up one level in this thread
On December 20, 2002 at 11:13:24, Roy Eassa wrote: >On December 20, 2002 at 11:10:53, Roy Eassa wrote: > >>How long to see that 21...Rxe3+ is very advantageous to Black? : >> >>[d] 4rrk1/p1p2pp1/7p/6qP/7b/1N2PQ1P/PPP1K3/RN5R b - - 0 20 >> >>Passov,Alex - Sammour-Hasbun,Jorge [C58] >>Manhattan Chess Club G/30, 1991 > > >How long until your program BOTH selects the right move AND sees that Black is >ahead? > >Fritz 7 takes about 30 seconds on my Athlon 1.2. On my P3-733, CM9000 takes 41 seconds to give Black a (barely) positive score. Then, at 2:11, the score becomes convincing: Time Depth Score Positions Moves 0:00 1/3 1.50 1669 20...Rxe3+ 21.Qxe3 Qg2+ 22.Kd3 Rd8+ 23.Nd4 Qxh1 0:00 1/4 1.63 5109 20...Rxe3+ 21.Qxe3 Qg2+ 22.Kd3 Rd8+ 23.Nd4 Qxh1 24.c4 0:00 1/5 1.38 23258 20...Rxe3+ 21.Qxe3 Qg2+ 22.Kd3 Rd8+ 23.Nd4 Qxh1 24.c4 Bf6 0:01 1/6 1.20 72987 20...Rxe3+ 21.Qxe3 Qg2+ 22.Kd3 Rd8+ 23.Kc3 Qxh1 24.Nd4 Be1+ 25.Kc4 c5 0:03 1/7 1.39 224983 20...Rxe3+ 21.Qxe3 Qg2+ 22.Kd3 Rd8+ 23.Kc4 Qc6+ 24.Nc5 Qxh1 25.Kb3 Bg5 0:07 1/8 1.34 646775 20...Rxe3+ 21.Qxe3 Qg2+ 22.Kd3 Rd8+ 23.Kc4 Qc6+ 24.Nc5 Qxh1 25.Qe4 Qxh3 26.Nc3 Bf6 0:17 1/9 0.93 1635576 20...Rxe3+ 21.Qxe3 Qg2+ 22.Kd3 Rd8+ 23.Kc4 Qd5+ 24.Kb4 Rb8+ 25.Kc3 Qxh1 26.Nd4 c5 27.Nf3 Qxh3 0:41 1/10 -0.03 4252444 20...Rxe3+ 21.Qxe3 Qg2+ 22.Kd3 Rd8+ 23.Kc4 Qd5+ 24.Kb4 Rb8+ 25.Kc3 Bf6+ 26.Nd4 Qxh1 27.Kd3 Rxb2 28.Qe8+ Kh7 29.Qxf7 Rxb1 30.Rxb1 Qxb1 2:11 2/11 -1.49 14250189 20...Rxe3+ 21.Qxe3 Qg2+ 22.Kd3 Rd8+ 23.Kc4 Qd5+ 24.Kb4 Rb8+ 25.Kc3 Bf6+ 26.Nd4 c5 27.Rd1 cxd4+ 28.Rxd4 Rd8 29.Kd2 Bxd4 jm
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