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Subject: Re: black to move... how many humans can find the winning move...

Author: Dan Ellwein

Date: 10:59:44 12/01/05

Go up one level in this thread


On December 01, 2005 at 11:51:59, Peter Kappler wrote:

>On November 30, 2005 at 00:34:47, Dan Ellwein wrote:
>
>>[Event ""]
>>[Site ""]
>>[Date "2005.11.29"]
>>[Round ""]
>>[White "Chessmaster"]
>>[Black "CM10_Smooth"]
>>[TimeControl "720+12"]
>>[Result "0-1"]
>>[ECO "C16"]
>>
>>Fischer time: 12 min /12 sec
>>
>>P3/850
>>
>>1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 Ne7 5.a3 Bxc3+ 6.bxc3 b6 7.Qg4 O-O 8.Bg5 Qd7
>>9.Bd3 Ba6 10.Ne2 Ng6 11.O-O Bxd3 12.cxd3 c5 13.h4
>>cxd4 14.cxd4 Ne7 15.h5 Nf5 16.Ng3 Nc6 17.h6 g6 18.Nxf5 exf5 19.Qf4 Nd8 20.Bxd8
>>Raxd8 21.Rfc1 Rc8 22.Rxc8 Rxc8 23.Rc1 a6 24.Rxc8+
>>Qxc8 25.Qg5
>>
>>[d]2q3k1/5p1p/pp4pP/3pPpQ1/3P4/P2P4/5PP1/6K1 b - - 0 25
>>
>>see if you can find black's move, then scroll down to see what CM10_Smooth
>>did...
>>
>
>25...f6 forces a draw.  White plays 26. Qxf6 and Black has to force perpetual
>check.
>
>-Peter


Why, then, did Chessmaster (default setting) not see this and draw the game?


>>25. ...f6!
>>
>>26.Qe3 Kf7 27.g4 fxg4 28.exf6 Qc7 29.Qe5 Qxe5 30.dxe5 b5 31.Kf1 d4 32.Ke2 g5
>>33.Ke1 Kg6 34.Kf1 Kxh6 35.e6 Kg6
>>36.f7 Kg7 37.Ke1 a5 38.Kd2 h5 39.Ke2 b4 40.axb4 axb4 41.Kd2 h4 42.Kc2 h3 43.Kb3
>>h2 44.Kxb4 h1=Q 45.Kc5 Qf3 46.Kd6 Qxf2 47.Kd7 g3
>>48.Kd8 Qf6+ 49.Kd7 Kf8 50.Kd6 Qe7+ 51.Kd5 g2 52.Ke5 g1=Q 53.Kd5 Qg2+ 54.Ke5 Qg4
>>55.Kd5 Qgxe6+ 56.Kxd4 Qb4# 0-1
>>
>>Dan



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