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Subject: Re: Why a5?

Author: Richard Pijl

Date: 09:25:12 06/29/05

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On June 29, 2005 at 12:15:47, Jack Lad wrote:

>[d] 2k5/2p5/1p1q4/4p3/P1P2rp1/3PQ2p/5P1P/R5K1 w
>
>1.a5? bxa5 2.Rxa5 Rxc4! and black should win from here.  So can your engine find
>a good move for white instead or does it still insist on playing a5??

The Baron (on P4-2.4) finds the trouble, but hasn't anything better:
 10(20).   0:15.49   3348351   -0.70  a4-a5 Qd6-d4 Qe3xd4 Rf4xd4 a5xb6
                                      c7xb6 Ra1-a8 Kc8-d7 Ra8-a7 Kd7-c6 Ra7-e7
                                      Rd4xd3 Re7xe5
 11(22)-   0:35.81   7896819   -1.05  a4-a5 (b6xa5) (Ra1xa5) (Rf4xc4) (Qe3-g5)
                                      (Qd6-g6) (Ra5-a8) (Kc8-b7) (Ra8-a7) (Kb7xa
7) (Qg5xg6)
                                      (Rc4-c1)
 11(22)&   0:39.88   8908365   -1.21  a4-a5 b6xa5 Ra1xa5 Rf4xc4 Kg1-f1
                                      Rc4-c3 Ra5xe5 Qd6xd3 Qe3xd3 Rc3xd3 Kf1-e2
                                      Rd3-d7 f2-f4 (g4xf3)
 11(24).   0:52.78  11926563   -1.21  a4-a5 b6xa5 Ra1xa5 Rf4xc4 Kg1-f1
                                      Rc4-c3 Ra5xe5 Qd6xd3 Qe3xd3 Rc3xd3 Kf1-e2
                                      Rd3-d7 f2-f4 (g4xf3)
 12(23)&   1:09.92  15978811   -1.29  a4-a5 b6xa5 Ra1xa5 Rf4xc4 Kg1-f1
                                      Rc4-c3 Kf1-e2 Rc3-b3 Ra5-a8 Kc8-d7 Qe3-e4
                                      Rb3-b2 Ke2-f1 Rb2-b1
 12(24).   1:33.21  21408239   -1.29  a4-a5 b6xa5 Ra1xa5 Rf4xc4 Kg1-f1
                                      Rc4-c3 Kf1-e2 Rc3-b3 Ra5-a8 Kc8-d7 Qe3-e4
                                      Rb3-b2 Ke2-f1 Rb2-b1
 13(27)&   2:20.06  32218352   -1.53  a4-a5 b6xa5 Ra1xa5 Rf4xc4 Ra5-a8
                                      Kc8-d7 Qe3-g5 Qd6-f6 Ra8-d8 Qf6xd8 Qg5-f5
                                      Kd7-c6 Qf5-e6 Kc6-b7 Qe6xc4 Qd8-d4 Qc4-b5
 13(27).   3:51.46  52499272   -1.53  a4-a5 b6xa5 Ra1xa5 Rf4xc4 Ra5-a8
                                      Kc8-d7 Qe3-g5 Qd6-f6 Ra8-d8 Qf6xd8 Qg5-f5
                                      Kd7-c6 Qf5-e6 Kc6-b7 Qe6xc4 Qd8-d4 Qc4-b5



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