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

Author: Günther Simon

Date: 12:02:56 12/01/05

Go up one level in this thread


On December 01, 2005 at 13:59:44, Dan Ellwein wrote:

>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

This happens not that seldom, if one side is only slightly in material up,
it will try to win and this can sometimes even lead to a loss.
IMHO this overpowering(?) is an attribute which mimics Humans at most.
(not intended though) ;-)



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