Author: chandler yergin
Date: 12:58:17 12/02/05
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On December 02, 2005 at 15:49:11, Paul Jacobean Sacral wrote: >On December 02, 2005 at 15:19:51, chandler yergin wrote: > >>On December 02, 2005 at 14:56:48, Uri Blass wrote: > >>>Engines can say mate in 14 even when there is mate in 11 but not the opposite. >>> >>>Engines should say mate in 11 for white only when they checked all defences of >>>black and found that there is no defence against mate in 11. > >>Engines evaluate all moves 1/2 move i.e. 1 Ply at a time. >>Nothing more.. nothing less. >>The deeper the search the better the evaluation. >>You assert bugs when there is none. > >Excuse me, but with replies like that people will start to think that you are a >troll. Please don't explain to Uri Blass how engines work: He has written an >engine himself. So what! > >Call it bug, mistake, error or whatever you like: If the shortest possible mate >in a position is #14 and an engine displays #11, there is something wrong. Nope! The engine sees a line it calls it! That is what it's supposed to do! "Engines evaluate all moves 1/2 move i.e. 1 Ply at a time." Nothing more.. nothing less. The deeper the search the better the evaluation. On deeper search it found there was only a Mate in 14. Maybe >a rare effect of nullmove pruning or something like that... but #11 is simply >wrong and not a "better evaluation!" :) I said the deeper the search the better the evaluation. That's exactly what happened.. on deeper search it confirmed Mate in 14 was correct. > >Yours truly Paul J. Sacral
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