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Subject: Re: Help needed: How can I search a 6 piece position by Nalimov tablebases?

Author: Tansel Turgut

Date: 06:27:47 12/04/04

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On December 04, 2004 at 08:24:22, Vasik Rajlich wrote:

>On December 04, 2004 at 07:00:11, Tansel Turgut wrote:
>
>>On December 04, 2004 at 06:54:48, Vasik Rajlich wrote:
>>>One computer trick is to let the position run overnight and if the scores you
>>>get haven't skyrocketed it's probably drawn. That is, if white is promoting a
>>>pawn here then a 30-ply search should be able to find it.
>>>
>>>You might even try it with an a-pawn instead of c-pawn just to see roughly how
>>>many plies are needed to find a clear win.
>>>
>>>For what it's worth - I'd guess draw. Ie. 1. .. Nc4 2. Kf2 Kg4 or 2. Kg2 Kf4.
>>>
>>>Vas
>>--------------------------------------------------------------------------
>>
>>Dear Vas, nice to hear from you..
>>
>>it's not so easy for black. If the king remains on the king side, white can get
>>his king on the queen side, and then limitimg the available squares with the
>>bishop, may prevent black from sacrificing the knight for the bishop.
>>
>>The computer programs give high evaluations for white, but they don't understand
>>the bishops of opposite colors.
>>
>>Can i generate a 6 piece table base with these material?
>>
>>Tansel
>
>Hi Tansel,
>
>yes - nice to hear from you also. I'd ask if you're a GM yet but I know these
>tournaments take like 4 years :)
>
>Re. white giving up the h-pawn - as soon as this happens, you can already access
>the tablebases. For instance, the variation 1. .. Nc4 2. Kf2 Kh4 3. Bg8 Nd6 4.
>Ke3 Kh3 5. Kf4 Kxh2 6. Ke5 Nc8 is drawn. Maybe you can enumerate all the
>different ways in which white can give up the h-pawn, and look up each
>possibility in the TBs.
>
>As far as generating the six-piece tablebase - you might try contacting Eugene
>Nalimov (obviously) or maybe Bob Hyatt.
>
>Vas



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