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Subject: Re: One another good test position for programs!

Author: Dann Corbit

Date: 15:41:54 12/08/99

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On December 08, 1999 at 14:54:29, Ricardo Gibert wrote:

>On December 08, 1999 at 13:26:25, Côme wrote:
>
>>On December 08, 1999 at 12:33:53, Ricardo Gibert wrote:
>>
>>>On December 08, 1999 at 09:34:04, Côme wrote:
>>>
>>>>Hello everybody,
>>>>In this position:
>>>>rn1qr1k1/1p2bppp/p3p3/3pP3/P2P1B2/2RB1Q1P/1P3PP1/R5K1 w - -
>>>>Does your program find the winning move Bxh7!!
>>>>Best Regards
>>>>Alexandre Côme
>>>
>>>Could you supply some analysis?
>>
>>Hello,
>>Bxh7!! ,Kh7,Qh5,Kg8,Rg3:
>>1)Bf8,Bg5,Qb6,Bf6,Nd7,Rxg7!
>>2)Nc6,Bh6,g5,Rxg5!
>>3)Nd7,Bh6,g5,Bxg5,Bxg5,Rxg5,Kf8,Ra3!
This is actually a standard computer chess test position.  Here is the C.A.P.
record:
rn1qr1k1/1p2bppp/p3p3/3pP3/P2P1B2/2RB1Q1P/1P3PP1/R5K1 w - - acd 13 acn
110170343; bm d3h7; ce 31; id "Complete CCovax A.150 [par=2]"; pm Bc2; pv Bc2
Nc6 Qd3 g6 Qe3 f5 exf6 Bxf6 Rd1 e5 dxe5;

You are right that most computers do not get the correct answer (including this
calculated wrong answer).



>>4)g6,Rxg6!,fxg,Qxg6,Kh8,Qh6,Kg8,Qxe6,Kh8,Qh6,Kg8,Qg6,Kh8,Qh5,Kg8,Bh6,Bf8,Qg6,Kh8,Bxf8,Rxf8,Qh6,Kg8,Ra3!
>>
>>Best Regards
>>Alexandre Côme
>
>Very nice. I missed the Q maneuver that brings it to Qh5 in variation 4. I think
>the various chess programs will have a tough time with this one. Very
>intersting.



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