Author: Angrim
Date: 20:50:50 08/31/01
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On August 31, 2001 at 06:16:57, leonid wrote: >[D]2r2k2/2pqqr2/1nq2bb1/qnQQQQqq/q1Q2Q1q/2Q2Q2/2R2R2/2B2K2 w - - > >Please indicate your result. > >Thanks, >Leonid. older pn2 code: proved that move e5xe7 wins, 9 turns PN2:3496323 evals, 74810 expands, 17.28 seconds newest pn2 code: proved that move c5xe7 wins, 9 turns PN2:14645477 evals, 361828 expands, 84.17 seconds newest pn-search: proved that move e5xe7 wins, 9 turns PN:1810301 evals, 41852 expands, 10.39 seconds one downside to selective searchers: very unstable behavior. In all cases the search settled on a favorite move in the first second or so, then spent most of the remaining time proving that it won. It seems that e5xe7 is simpler to prove than c5xe7, so the 5:1 speed difference may well have resulted from a change in move ordering. Angrim
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