Author: Uri Blass
Date: 08:47:44 01/25/04
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On January 25, 2004 at 11:32:55, Kurt Utzinger wrote:
>Hi Uri
>Why is movei - despite of finding Nd4 - still
>showing a negative score (-3.63) for White?
>Kurt
The reason is simple
It does not know that KB vs KP is a draw amd it evaluates better mobility for
black as a positional advantage.
I also tried yace as a dos program and it could not find Nd4 in 2 seconds so I
suspect that it learned something from previous search in Sarah's machine before
doing it.
I told it hash 32M and here is the relevant part of the analysis(tablebases were
not used).
12446262 27.804 -4.30 10t+ 1.Kb1 Bd4 2.Rg3 Be5 3.Re3 Qc6
12696059 28.286 -4.29 10t 1.Kb1 Bd4 2.Rg3 Kb7 3.Rd3 Qg6 4.Kc2 Bb6H 5.Kc3H
Qc6+H 6.Kb4H {-431}
14108586 31.377 -4.28 10t+ 1.Nd4 Qa7
14173032 31.523 -3.84 10++ 1.Nd4 Qa7 2.Ra3+ Kb7
14179282 31.536 0.00 10++ 1.Nd4 Qa7 2.Ra3+ Kb7
Yace can find it slightly faster on my A1000 because I was busy in writing this
post but it certainly cannot search 14108586 nodes in 2 seconds.
Uri
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