Author: Robert Hyatt
Date: 06:53:15 04/16/00
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On April 16, 2000 at 09:25:33, Daniel Clausen wrote: >Hi > >On April 16, 2000 at 09:11:08, Charlie GOLD wrote: >> Crafty analysed the position and showed # in one (Pf8-N #), BUT IT DID NOT >>MAKE THE MOVE UNTIL I FORCED IT TO. The other machines made the move in less >>than 5 seconds. charlie > >Some engine continue with the search when they found a mate-in-N on a >certain ply in the hope to find a shorter mate. Of course in the case >of a mate-in-1 this is a bit silly. :) Maybe you saw this effect in >Crafty? > >Kind regards, > -sargon Crafty stops at the right point, _unless_ given a sd=N command. It uses the rule of "search to 2*N=1" when it finds a mate in N, just to be sure there isn't a shorter mate. In the position you gave, it stopped after 4 plies as that is the minimum depth it will normally search to, regardless of the mate found... I don't see how it could continue to search unless it is in infinite mode or a specific depth has been given to it...
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