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Subject: Re: Slate's Challenge of the Day

Author: Uri Blass

Date: 13:25:30 10/08/03

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On October 08, 2003 at 15:53:12, Slater Wold wrote:

>On October 08, 2003 at 15:13:03, Dieter Buerssner wrote:
>
>>On October 07, 2003 at 18:48:30, Slater Wold wrote:
>>
>>>r2br1k1/1b1n2p1/p2pp1Pp/qp6/3BPP2/P1N5/1PPQ4/1K1R1B1R w - -
>>>
>>>This game can be over in ~10 moves.
>>>
>>>Can you find Bxg7?
>>
>>Dann already posted another experiment with Yace. I had it run over night, too.
>>Just in the initial position. Not fast, but here is what I got:
>>
>> 926327176 7:59:22   2.75 15.  1.Bxg7 Kxg7 2.Bxb5 axb5 3.Rxh6 Nf6 4.Qh2 Rg8
>>                               5.Rh7+ Kf8 6.Rxb7 Rxg6 7.f5 Qa6 8.fxg6 Qxb7
>>                               9.Qh8+ Ng8 10.Rf1+ {HT} {-190}
>
>Just an interesting comparison between you and Dann.  He found:
>
>1. Bxd7 Kxg7 2. Bxb5 axb5 3. Rxh6 Nf6 4. Qh2 Rg8 5. Rh7+ Kf8 6. Rf7+ Ke8 7. e5
>dxe5 8. fxe5 Rxg6 9. exf6 with a score of +7.96.

It seems that dieter did not prove that score and the score is the score of the
final position after a game of yace against itself.

It is possible that if you try to prove it you get better moves for black.

After 7...dxe5 I get  even more than +9 for white but black has alternatives
like 7...Rxg6 +5.98/11 for white and the score may fail low later but I guess
that there are alternatives in earlier moves.

Uri





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