Author: Sune Fischer
Date: 03:06:10 12/26/02
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On December 26, 2002 at 05:59:23, Uri Blass wrote: >On December 26, 2002 at 05:17:03, Sune Fischer wrote: > >>On December 25, 2002 at 23:23:48, Drexel,Michael wrote: >> >>>[D] Q2Q2Q1/1R6/3BR3/3k3N/2RB2Q1/5R2/Q2Q2Bp/3N3K w - - 0 1 >>> >>>Problem: >>>White to move >>>If white gives check it has to be mate in one. >>>Find a legal position with the highest number of possible checks. >>> >>>I discovered this 5 years ago. Took me about 16 hours to find it. >>>I think it is possible to find a proof that it is not possible to find more: >>> >>>85 mates in one! :-) >> >>Are you sure, I "only" count 78 mates?? >> >>Mates ply 0........: 0 >>Mates ply 1........: 78 >>Mates ply 2........: 0 >>Mates ply 3........: 468 >>Mates ply 4........: 0 >>Mates ply 5........: 9538 >> >>how did you count them? >> >>>I must have been crazy. >> >>Yes, you will fit right in here :) >> >>-S. > > >modified perft of movei agree with your numbers. > >It counts 1380065-10084 mates at ply 7 and 0 mates in ply 8 > >Number of stalemates >52 at depth 1 >781-52 at depth 3 >12034-781 at depth 5 >2095567-12034 at depth 7 > >Can you check that these numbers are correct? I get: Ply CheckMates Stalemates 0 0 0 1 78 52 2 0 0 3 468 729 4 0 0 5 9538 11253 6 0 0 7 1369981 2083533 I'm running the ply 9 now, going to take a while so don't hold your breath ;) I wonder how long before black gets a mate, that pawn could promote and become dangerous! -S. >Uri
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