Author: Uri Blass
Date: 04:35:45 12/20/04
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On December 20, 2004 at 04:53:42, Peter McKenzie wrote: >[D]8/p7/7p/4k1p/6PP/P3K3/8/8 w - - > >White to play and draw. > >I saw this one in Informator 45 (1988). >1.a4 gxh4 2.a5! is the drawing line given. > >Warp doesn't get it but maybe other programs do. Tablebases could be a big help >here. I am surprised to read it. How much time did you give warp? Movei need some minutes on fast hardware to find it and movei is not using hash for pruning and only some bitbases to detect KPK draw thanks to Dieter are used. Here is movei's analysis depth=21 -1.60 a3a4 g5h4 a4a5 h4h3 e3f3 h3h2 f3g2 h2h1q g2h1 e5f4 a5a6 f4g4 h1g2 h6h5 g2h2 h5h4 h2g2 h4h3 g2h2 g4h4 h2g1 Nodes: 240889199 NPS: 824003 Time: 00:04:52.34 depth=22 -1.49 a3a4 g5h4 a4a5 h4h3 e3f3 h3h2 f3g2 h2h1q g2h1 e5f4 a5a6 f4g4 h1g2 h6h5 g2h2 h5h4 h2g2 h4h3 g2h1 g4f5 h1h2 f5g4 Nodes: 284434448 NPS: 833068 Time: 00:05:41.43 depth=23 -1.49 a3a4 g5h4 a4a5 h4h3 e3f3 h3h2 f3g2 e5f4 g2h2 f4g4 a5a6 g4h4 h2g1 h6h5 g1g2 h4g4 g2h2 h5h4 h2g2 h4h3 g2h1 g4f5 h1h2 f5g4 Nodes: 450941108 NPS: 830707 Time: 00:09:02.84 Uri
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