Author: Dave Gomboc
Date: 01:59:56 05/22/99
Go up one level in this thread
On May 21, 1999 at 23:28:42, Dann Corbit wrote: >On May 21, 1999 at 22:21:27, Dave Gomboc wrote: >[cough, blush] >>>[White "Glucksberg"] >>>[Black "Najdorf"] >At 15 minutes, neither is fully understood by crafty on a PII 300. >In the first position, it chose the wrong move, and had just realized that it >was going to hurt. >r1b2rk1/pp1n2pp/2p1p3/3p1pNq/2PP1Pn1/3BP1P1/PP2N1Kb/R1BQ1R2 b - - acd 13; acn >102540168; acs 900; ce 82; pv Bxg3 Rh1 Bh2 cxd5 Ndf6 Nf3 Nxd5 Qb3 Qg6 Rxh2 >Ngxe3+ Kh1 Qg4; >Here's the log's last little whimper: > 12-> 11:03 0.82 1. ... Bxg3 2. Rh1 Bh2 3. cxd5 Ndf6 > 4. Nf3 Nxd5 5. Qb3 Qg6 6. Rxh2 Ngxe3+ > 7. Kh1 Qg4 > 13 13:23 -- 1. ... Bxg3 >I think half an hour will probably find it. > >Interesting also that crafty picked the right move for the wrong reasons early >on (before changing to something else not as good): >6 0.82 -0.25 1. ... Ndf6 2. c5 Ne4 3. Nxe4 fxe4 > 4. Bc2 Qf5 >6 1.24 0.14 1. ... Bg1 2. Nxg1 Qh2+ 3. Kf3 Qh1+ > 4. Ke2 Qg2+ 5. Ke1 Nh2 6. N1f3 Nxf1 > 7. Bxf1 Qxg3+ >6-> 1.45 0.14 1. ... Bg1 2. Nxg1 Qh2+ 3. Kf3 Qh1+ > 4. Ke2 Qg2+ 5. Ke1 Nh2 6. N1f3 Nxf1 > 7. Bxf1 Qxg3+ >7 1.92 0.14 1. ... Bg1 2. Nxg1 Qh2+ 3. Kf3 Qh1+ > 4. Ke2 Qg2+ 5. Ke1 Nh2 6. N1f3 Nxf1 > 7. Bxf1 Qxg3+ >7 6.24 0.18 1. ... e5 2. Rh1 e4 3. Bc2 dxc4 4. > Ne6 Rf6 > >On the second position, Crafty flipped back and forth with Qh1+ and e5 until ply >8 at 25.5 seconds. But even by ply 11, crafty was only aware of a one pawn >advantage: >r1b2rk1/pp1n2pp/2p1p3/3p1pN1/2PP1Pn1/3BPKP1/PP5q/R1BQ1RN1 b - - acd 12; acn >110502697; acs 900; ce 101; pv e5 cxd5 e4+ Bxe4 fxe4+ Kxe4 Nf2+ Rxf2 Qxf2 dxc6 >bxc6 Kd3 Nf6 Ne2 Ba6+ Kd2; Whoops, I missed your response initially, I guess I didn't have the first Crafty results. :-) Did you clear the position.lrn and position.bin files before tackling the second problem? I got different variations when I tried it.. but I am running on 2 processors, that could be why. Dave
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