Author: Will Singleton
Date: 16:54:41 04/13/00
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On April 13, 2000 at 17:25:43, Will Singleton wrote: >On April 13, 2000 at 10:31:56, Jon Dart wrote: > >>I've been looking at the BT2630 test suite, which I run routinely. >> >>One of the positions is #26: >> >>[D]2r3k1/pbr1q2p/1p2pnp1/3p4/3P1P2/1P1BR3/PB1Q2PP/5RK1 w - - bm f5; id "test 26"; >> >>Is f5 really a decisive move here? Currently my program likes g3 >>after searching nearly 200 million nodes. At earlier plies it >>selected Re5. They all look pretty reasonable to me. f5 looks >>good : but is it positionally better, or does White get material >>or a decisive attack? >> > >Amateur starts with f5, but drops from a high of about +1 at ply 8 to +0.19 by >ply 12. I would guess that f5 might not be that much better than the others, >but what do the commercials say? > Hiarcs 6, 30 minutes, 300 mhz -- ce 43; pv f5 Ne4 Bxe4 dxe4 fxg6 Rc2 gxh7+ Kh8 d5+ e5 d6 Qe6 Rf8+ Kxh7 Qd1 Rxf8 Qxc2 Qxd6 ; > >>Another one that I'm not passing at present is #13: >> >>[D]2bq3k/2p4p/p2p4/7P/1nBPPQP1/r1p5/8/1K1R2R1 b - - bm Be6; id "test 13"; >> >>I used to get Be6, but now on a faster machine it eventually >>switches back to c2+ at ply 12 and holds it. >> >>--Jon > >Mine starts with c2 and stays there, though the score steadily drops, ending at >+2. > Hiarcs 6, 30 minutes, 300 mhz -- ce -31; pv c2+ Kb2 cxd1=Q Rxd1 Ra5 Rf1 Bxg4 Qxg4 Rg5 Qf3 a5 h6 d5 exd5 Qd6 Qf8+ Rg8 Qf7 ; I let this one go longer, and about 40 minutes it switched to Be6 with a score of +1.16. I wonder if any program can find this within 15 minutes? Will
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