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Subject: Re: Testposition - Bishop against 3 pawns

Author: Dieter Buerssner

Date: 05:11:40 02/28/01

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On February 28, 2001 at 08:02:50, Sune Larsson wrote:

>On February 28, 2001 at 07:36:25, Dieter Buerssner wrote:
>
>>On February 28, 2001 at 06:23:35, Sune Larsson wrote:
>>
>>
>>>  8/5k2/7P/3K1PP1/8/8/1b6/8 b - - 0 1
>>
>>>  Test: The above position is a draw after 1.-Bc1 and should be
>>>        evaluated close to 0.00.
>>
>>Yace 0.99.09, running in the background on AMD K6-2 475 with 20 MB hash.
>>
>>  nodes    time     score depth
>> 257425330 31:45.2   0.00 27t  1...Bc1 2.h7 Kg7 3.g6 Bb2 4.Ke6 Kh8 5.Kd7 Kg7
>>                               6.h8=Q+ Kxh8 7.Ke8 Kg7 8.Kd8 Bc3 9.Kd7 Kh8
>>                               10.g7+ Bxg7 {EGTB} 11.f6 Bf8 12.f7 Bg7 13.f8=Q+
>>                               Bxf8! {No mating material} {350}
>>
>>Yace also thinks, that Kg8 is drawing:
>>
>>  1368792  10.027   0.00 20t  2.Ke6 Bc1 3.Kf6 Bb2+ 4.Kg6 Bc1 5.f6 Bd2 6.Kh5
>>                              Bc3 7.Kh4 Bd2 8.Kg4 Bc3 9.f7+ Kxf7 10.g6+ Kxg6
>>                              {EGTB} 11.h7 Bd4 12.h8=Q Bxh8! {No mating
>>                              material} {-350}
>>
> Absolutely perfect analyse from Yet another Ace! ;)

Thanks

> This makes me
> happy to see. Would Yace also play the above line in a normal
> tournament game?

After 10 seconds, Yace only switched between Kg8 and Bc1. The score was -1.7x
and approached 0.0 later. I of course hope, that the draw for Kg8 is correct.

-- Dieter




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