Author: Uri Blass
Date: 07:56:14 02/17/01
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On February 17, 2001 at 08:10:24, leonid wrote: >Hi! > >If you like to solve the mate that is apperently easy but still contain some >challenge then try the next one: > >[D]R3Nnrk/1Q3bqq/3QnQ1r/1Q4bn/4Q1qN/2Q2nQ1/Q2BB3/1Q1K3R w - - > >Please, indicate your result. > >I hope that your brute force search will be more successful that mine. Mine went >this way: > >LLchess mate solver. AMD 400Mhz. No hash. > >3 moves - 1.4 sec. >4 moves - 20.7 sec. >5 moves - 8 min. 23 sec. > >My chances to solve by brute force, after those numbers, looke not very bright. >Even solution by selective took 25 sec. I hope your program will do better. > >Initial number of white moves is 152. > >Thanks, >Leonid. 1)Junior found mate in 8 by 1.Qxh7+(Did you find a shorter mate?) 2)How do you decide if a problem is easy or hard? I think that deciding only by the distance to mate if the problem is easy or hard is wrong. There are longer mates that are more easy to find and Crafty could find mate in 16 in few seconds in a different position when it needs more time to find a mate in this position. Uri
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