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Subject: Re: How many engines select c5? Bratko-Kopec Test Position One

Author: Richard Pijl

Date: 14:53:48 01/23/05

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On January 23, 2005 at 16:48:25, Cliff Sears wrote:

>http://www.kopecchess.com/bratko.html
>
>Interesting test. I am running three Engines and so far only Anaconda 1.62
>selects c5. Little Goliath Nemesis and Chess Tiger so far have not after a few
>minutes.
>
>Black to move...
>
>[d] rn2k2r/pbpp1pp1/1p2pq1p/8/1b1PP3/2NB1N2/PPPQ1PPP/R3K2R b KQkq - 0 1
>

The Baron (development version) needs a little over three minutes for this on a
P4-2.4:

 11(16).   1:17.99  16344097   -0.42  d7-d5 e4-e5 Qf6-e7 Qd2-f4 Nb8-d7
                                      O-O O-O-O Nc3-b5 g7-g5 Qf4-g3 Kc8-b8
 12(18)&   1:56.82  24758615   -0.47  d7-d5 e4-e5 Qf6-e7 a2-a3 Bb4xc3
                                      b2xc3 Nb8-c6 c3-c4 O-O c4xd5 e6xd5
                                      O-O
 12(18)&   3:09.49  40394421   -0.44  c7-c5 d4xc5 b6xc5 e4-e5 Qf6-d8
                                      a2-a3 Bb4-a5 O-O Bb7xf3 g2xf3 Qd8-g5
                                      Qd2xg5 h6xg5
 12(18).   3:39.32  46846153   -0.44  c7-c5 d4xc5 b6xc5 e4-e5 Qf6-d8
                                      a2-a3 Bb4-a5 O-O Bb7xf3 g2xf3 Qd8-g5
                                      Qd2xg5 h6xg5
 13(19)&   5:07.86  65019170   -0.30  c7-c5 d4xc5 b6xc5 e4-e5 Qf6-e7
                                      O-O-O O-O Bd3-c4 Bb4xc3 Qd2xc3 Nb8-c6
                                      Rd1-d6 Nc6-b4



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