Author: piet de hoop
Date: 11:34:20 11/18/01
Go up one level in this thread
On November 18, 2001 at 10:14:09, Rafael Andrist wrote:
>On November 18, 2001 at 10:03:15, piet de hoop wrote:
>
>>The next position occured in Diep versus Rebel Century 4 round 6 of the Dutch
>>Open Computer Chess 2001
>>
>>[D] 8/6p1/3k3p/8/3K4/7P/8/8 b - - 0 43
>>
>>The result was a draw, but for some computerprograms I tried, the evaluation was
>>from -1 to -3.4 pawn. (Fritz 6.0, Crafty,Yace)
>>
>>I expect that programs equipped with the right pawntable base have no problem
>>with this position, but i expected that programs without these tablebase while
>>calculating over 30 plys or more should give the right evalution?
>>
>>Or do i miss something?
>>
>
>If the program doesn't know it is a draw, then Black won't give his extra pawn
>away in the search. To recognize a draw by 50 move rule, several hundreds of
>plys are necessary.
>
>The position you posted is interesting because the right to move decides about
>win or draw. Can you please post the whole game?
>
>Rafael B. Andrist
[Event "21st Dutch CC"]
[Site "Leiden NED"]
[Date "2001.10.28"]
[Round "06"]
[White "Diep"]
[Black "Rebel Century 4"]
[Result "1/2-1/2"]
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 O-O 5.a3 Bxc3+ 6.Qxc3 b6 7.Bg5 Bb7 8.f3 h6
9.Bh4 d5 10.e3 Nbd7 11.cxd5 Nxd5 12.Bxd8 Nxc3 13.Bh4 Nd5 14.Bf2 c5
15.e4 Nf4 16.Bb5 Rad8 17.Ne2 Nxg2+ 18.Kf1 f5 19.d5 a6 20.dxe6 axb5
21.e7 fxe4 22.exd8=Q Rxd8 23.fxe4 Rf8 {DIAGRAM} 24.Nc3 Nf4 25.Be3 b4 26.axb4
cxb4
27.Ra7 bxc3 28.Rxb7 cxb2 29.Kf2 Nd3+ 30.Ke2 Nc1+ 31.Rxc1 bxc1=Q 32.Bxc1 Rf7
33.h3 Kf8 34.Rc7 Nc5 35.Rc8+ Ke7 36.Rb8 Nxe4 37.Rb7+ Ke6 38.Rxb6+ {DIAGRAM} Nd6
39.Ba3 Rd7 40.Ke3 Kd5 41.Rxd6+ Rxd6 42.Bxd6 Kxd6 43.Kd4 Ke6 44.Ke4 g5
45.Kf3 h5 46.Ke2 Ke5 47.Ke3 Kf5 48.Kf3 Kf6 49.Kf2 Ke7 50.Ke3 Kd6 51.Kd2 Kc6
52.Ke3 Kd5 53.Kd3 g4 54.hxg4 hxg4 55.Ke2 Ke4 56.Kf2 Kf4 57.Kg2 Kg5
58.Kh1 g3 59.Kg2 Kf4 60.Kg1 Kg4 61.Kg2 Kh4 62.Kg1 Kh3 63.Kh1 g2+
64.Kg1 Kg3 1/2-1/2
You can find the complete games on www.computerschaak.nl
Piet
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