Author: William Bryant
Date: 16:49:32 06/13/99
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On June 13, 1999 at 13:49:41, James Robertson wrote: >I was testing a newer version of my program with WAC, and at position 146: > >8/8/2Kp4/3P1B2/2P2k2/5p2/8/8 w - - bm Bc8; id WAC146; > >where it usually chooses Bc8, it chose Bh3, with nearly the same score for both >moves. I was curious, so I tried Crafty 16.6 on the positions after Bc8 and Bh3, >respectively. Bc8 (the WAC move) generated a score of ~+9.77 (I think) and Bc8 >generated a score of +9.75. Can anyone else comfirm that the moves are about >equal? > >Thanks, >James I don't know how equal they are at deeper depths, but Screamer kept Bc8 until ply 14, when the score changes from +4.31 to +4.51 when it switched to Bh3. At ply 15 it found Bc8 much better when it failed high with the score eventually jumping to +7.78 Analysis below. William wbryant@ix.netcom.com New Board Position 8/8/2Kp4/3P1B2/2P2k2/5p2/8/8 w - - bm Bc8; id WAC146; Move 1 W>> The Current Search Time: 600 seconds PLY NODES TIME SCORE PV ____________________________________________ 5 1436 0:00 +3.03 Bh3 Kg3 Bf1 Kf2 Bd3 6 4091 0:00 +3.03 Bh3 Kg3 Bf5 Kf4 Bh3 6 6240 0:00 +3.27 Bc8 Kg3 c5 dxc5 Kxc5 f2 7 12693 0:00 +3.27 Bc8 Kg3 c5 dxc5 Kxc5 f2 Ba6 8 27157 0:00 +3.27 Bc8 Kg3 Bf5 Kf4 Bc8 9 51092 0:00 +3.27 Bc8 Kg3 Bf5 Kf4 Bc8 10 101437 0:01 +3.36 Bc8 Kg3 c5 dxc5 Ba6 f2 d6 c4 Bxc4 Kf4 11 195174 0:02 +3.60 Bc8 Kg3 c5 dxc5 Ba6 f2 d6 c4 Bxc4 Kf4 d7 12 518942 0:06 +4.20 Bc8 f2 Bh3 Kg3 Bf1 Kh2 Kxd6 Kg1 Bh3 f1=Q Bxf1 Kxf1 13 952254 0:11 +4.51 Bc8 f2 Bh3 Kg3 Bf1 Kh2 Kxd6 Kg1 Be2 f1=Q Bxf1 Kxf1 14 1947786 0:23 +4.31 Bc8 f2 Bh3 Kg3 Bf1 Kh2 Kxd6 Kg1 Be2 f1=Q Bxf1 Kxf1 c5 Ke2 14 2617805 0:31 +4.51 Bh3 Kg3 Bf1 Kf2 Bh3 Kg3 Bf5 Kf2 Kxd6 Ke1 c5 f2 Bh3 f1=Q Bxf1 Kxf1 15 3574138 0:43 +4.51 Bh3 Kg3 Bf1 Kf2 Bh3 Kg3 Bf1 15 6129986 1:16 +4.91 Bc8 16 20048517 4:13 +7.78 Bc8 f2 Bh3 Kg3 Bf1 Kh2 c5 dxc5 d6 Kg1 Bc4 f1=Q Bxf1 c4 d7 c3 d8=Q Kxf1
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