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Subject: Re: Can any program solve this position?

Author: blass uri

Date: 23:00:09 10/23/98

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On October 24, 1998 at 01:23:16, Jeremiah Penery wrote:

>On October 23, 1998 at 14:09:44, Mark Young wrote:
>
>>[FEN "8/k1p5/1q1p4/pPpPp1p1/N1P1Pp1p/P4PbP/K2Q2P1/8 w - - 1 0"]
>>
>>I found this position posted below, I found a win after the move Nxb6, but no
>>computer I have can find it. Is there any way to program a chess program how to
>>handle this kind of position and still not hurt the program's overall strength
>>in other position?
>>
>>This line is the fastest way to win this position I can find. But no computer
>>will play it, and they fall to the 50 move rule.
>>
>>1. Nxb6! c7xb6 2. Kb3 Kb8 3. Ka4 Kc7 4.Qxa5!! 1-0
>>
>>or
>>
>>1. Nxb6! Kxb6 2. Kb3 c6 3. Ka4 cxb5+ 4. cxb5 Kb7 5. Qxa5 1-0
>
>Here is what my slightly modified Crafty plays:
>
>1. Nxb6 cxb6 2. h4 Bxh4 3. Qc1 Bd8 4. Qh1 h4 5. Qh3 Kb8 6. Qd7 Bc7 7. Qe8+
>Kb7 8. a4 Ka7 9. Qc8 Bd8 10. Qxd8 Kb7 11. Qd7+ Ka8 12. Qc8+ Ka7 13. Qc7+
>Ka8 14. Qxb6 h3 15. Qc7 hxg2 16. b6 g1=Q 17. Qa7#
>
>It saw 2. Kb2 for a while then switched to Kb3, and finally to h4.
>
>Jeremiah

I think that you  put the black pawns at h5,g6 instead of h4,g5

In the real game between humans the pawns were at h5,g5 so 3...Bd8 is impossible
because black has a pawn at g5

Uri



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