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Subject: Re: Mate in 14

Author: Paul Jacobean Sacral

Date: 12:49:11 12/02/05

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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.

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. Maybe
a rare effect of nullmove pruning or something like that... but #11 is simply
wrong and not a "better evaluation!" :)

Yours truly Paul J. Sacral



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