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Subject: Re: Test: quiet move and Zugzwang

Author: Uri Blass

Date: 19:15:31 07/28/04

Go up one level in this thread


On July 28, 2004 at 20:49:22, John Merlino wrote:

>On July 28, 2004 at 20:17:31, Uri Blass wrote:
>
>>On July 28, 2004 at 19:38:16, John Merlino wrote:
>>
>>>On July 28, 2004 at 18:44:03, Ignacio Santos Crespo wrote:
>>>
>>>>2. Bb6!
>>>>
>>>>1. Rb5+ Nb6 2. Bxb6
>>>
>>>2...Rh2 3.Kg3 Rxh1.
>>>
>>>Now what?
>>>
>>>jm
>>
>>
>>I know this study
>>
>>2...Rh2 3.Kg4! Rxh1 4.Bg1+ with the idea 5.Rb1 and the black rook has no moves
>>and the black king cannot move forever to white squares so white wins.
>>
>>Uri
>
>So, indeed, the hard part (for chess engines) is not finding 1.Rb5+, but rather
>finding 2.Bxb6, 3.Kg4 and 4.Bg1+.
>
>CM_SKR does not find any of those moves in a reasonable amount of time (on my
>AMD 2500).
>
>jm


Finding 2.Bxb6 is not the hard part for movei
2.Bxb6 is always in the pv.
The problem for it seems to be  to find Kg4

depth=16 +2.86 f5b5 c8b6 d8b6 d2h2 h4g3 h2h1 g3g2 h1d1 b5f5 b8b7 f5f6 d1d3 b6c5
h6h5 f6e6 b7c7 c5e3
Nodes: 2060864346 NPS: 708826
Time: 00:48:27.43

Uri



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