Author: Dennis Breuker
Date: 08:24:14 11/22/02
Go up one level in this thread
On November 22, 2002 at 10:30:34, Robert Hyatt wrote: >On November 22, 2002 at 07:21:13, Uri Blass wrote: > >>What do you search after finding a mate? >>Does genesis search for a shorter mate and in this case does it knows not to >>search when it get ply that means that no shorter mate can be found? >> >>Movei simply stop searching after finishing an iteration with mate score. >> >>Uri > > >I would suspect he does like most everyone else. Search until you reach depth >2*N-1 where N is the mate depth as in mate in 9. I need to search 17 plies to >verify that no shorter mate than mate in 9 exists... That's what I did as well. Until someone (was it Bas Hamstra, or maybe Walter Ravenek?) told me that 2*(N-1)-1 plies (so 15 in this case) is enough! If no mate is found within 15 plies then there is no mate in 8, so the mate in 9 must be shortest! Dennis
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