Author: Stefan Meyer-Kahlen
Date: 09:29:09 04/14/00
Go up one level in this thread
On April 14, 2000 at 12:27:48, Stefan Meyer-Kahlen wrote: >On April 13, 2000 at 19:54:41, Will Singleton wrote: > >>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 > >Yes, Shredder can I bet many more. >Here's the output of my latest version on a PII-450: > > 8 -> 0:01.59 +3.88 1...c2+ 2.Kb2 cxd1Q 3.Rxd1 Rh3 4.Rf1 Bb7 5.Qf8+ Qxf8 >6.Rxf8+ Kg7 7.Rf7+ Kh6 8.Re7 Rh2+ 9.Kc1 (203.936) 127.9 > 9.01 0:01.68 +4.13++ 1...c2+ 2.Kb2 cxd1Q 3.Rxd1 Rh3 4.Rf1 Be6 5.Qe5+ dxe5 >6.Rf8+ Qxf8 (214.388) 127.0 > 9.01 0:02.59 +4.35 1...c2+ 2.Kb2 cxd1Q 3.Rxd1 Rh3 4.g5 Bb7 5.Rf1 Nd3+ >6.Bxd3 Rxd3 (325.268) 125.3 > 9 -> 0:03.64 +4.35 1...c2+ 2.Kb2 cxd1Q 3.Rxd1 Rh3 4.g5 Bb7 5.Rf1 Nd3+ >6.Bxd3 Rxd3 (464.672) 127.6 >10.01 0:06.39 +4.30 1...c2+ 2.Kb2 cxd1Q 3.Rxd1 Rh3 4.h6 Rh4 5.Rh1 Bxg4 >(806.220) 126.1 >10 -> 0:24.01 +4.30 1...c2+ 2.Kb2 cxd1Q 3.Rxd1 Rh3 4.h6 Rh4 5.Rh1 Bxg4 >(2.925.188) 121.8 >11.01 0:36.57 +4.05-- 1...c2+ 2.Kb2 cxd1Q 3.Rxd1 Rh3 4.h6 Rh4 5.Rf1 Nc2 >6.Qf8+ Qxf8 (4.274.243) 116.8 >11.01 0:43.31 +3.55-- 1...c2+ 2.Kb2 cxd1Q 3.Rxd1 Rh3 4.h6 Rh4 5.Rf1 Nc2 >6.Kxc2 Bxg4 (5.132.136) 118.4 >11.01 0:55.14 +2.66 1...c2+ 2.Kb2 cxd1Q 3.Rxd1 Rh3 4.h6 Be6 5.Bxe6 Nd3+ >6.Rxd3 Rxd3 7.Qxd6 cxd6 (6.543.072) 118.6 >11.02 1:10.53 +2.67++ 1...Be6 2.Qc1 c2+ 3.Kb2 cxd1N+ 4.Kxa3 Nc2+ 5.Qxc2 Ne3 >6.Qc1 Nxc4+ 7.Kb3 Qb8+ 8.Kc2 c5 9.Qa1 (8.340.119) 118.2 >11.02 1:27.07 +3.02++ 1...Be6 2.Qc1 c2+ 3.Kb2 Bxc4 4.Kxa3 c5 5.Kb2 cxd1Q >6.Qxd1 Qe7 7.dxc5 dxc5 (10.305.192) 118.3 >11.02 1:51.20 +4.65 1...Be6 2.Qc1 c2+ 3.Kb2 Bxc4 4.Kxa3 c5 5.Kb2 cxd1N+ >6.Qxd1 Nd3+ 7.Kc2 Qf6 8.e5 Qf2+ (12.942.339) 116.3 >11 -> 3:04.65 +4.65 1...Be6 2.Qc1 c2+ 3.Kb2 Bxc4 4.Kxa3 c5 5.Kb2 cxd1N+ >6.Qxd1 Nd3+ 7.Kc2 Qf6 8.e5 Qf2+ (20.768.946) 112.4 >12.01 4:31.25 +4.87 1...Be6 2.Qc1 c2+ 3.Kb2 Bxc4 4.Kxa3 c5 5.Kb2 cxd1N+ >6.Rxd1 Nd3+ 7.Rxd3 Bxd3 (30.401.995) 112.0 > >Stefan Sorry, I should have formatted it a bit more :-) Stefan
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