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Subject: Re: Test Move for Engines -- Diagonal Clearance

Author: Miguel A. Ballicora

Date: 07:29:46 03/09/02

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On March 09, 2002 at 08:31:20, Art Basham wrote:

>Here white plays d4-d5, making way for the Queen to move to a7..!
>
>I loaded this diagram into my new Chess Arena to test my seven engines,
>and "Crazy Bishop" was the only engine that found this move!
>
>[D]2k2r1r/1pp5/p1p1b2q/4N1pp/1P1P4/2P1Q3/P4RPP/5RK1 w - -

Try this position where Ng6 is not winning:

[D]2k2r1r/1pp4p/p1p1b2q/4N1p1/1P1P4/2P1Q3/P4RPP/5RK1 w - -

Gaviota now sees it much sooner.
Anyway Crafty 17.14 sees the solution in 50 seconds on AMD K2 400 mhz
(the original position)

    312802   6:     10.0    +0.62  Ne5-f7   Be6xf7   Rf2xf7   Rf8xf7
                                   Rf1xf7   Qh6-g6   Rf7-f1
    330344   7      10.5    +0.43  Ne5-f7   Be6xf7   Rf2xf7   Rf8xf7
                                   Rf1xf7   Qh6-g6   Rf7xc7   Kc8xc7
                                   Qe3-e5   Kc7-b6   Qe5xh8
    480318   7      14.6    +0.52  Rf2xf8   Rh8xf8   Rf1xf8   Qh6xf8
                                   Ne5xc6   Qf8-f7   Nc6-e5   Qf7-f5
                                   a2-a4    Be6-d5   Ne5-f3
    572369   7      17.2    +0.56  Ne5-g6   Rf8xf2   Qe3xe6   Kc8-b8
                                   Kg1xf2   h7xg6    a2-a4    Qh6-g7
    595650   7      17.8      :-)  d4-d5
    638899   7      19.2      :-)  d4-d5
    703572   7      21.0    +1.94  d4-d5    c6xd5    Qe3-a7   Kc8-d8
                                   Qa7-b8   Be6-c8   Ne5-f7   Rf8xf7
                                   Rf2xf7   Qh6-d6
    748440   7:     22.1    +1.94  d4-d5    c6xd5    Qe3-a7   Kc8-d8
                                   Qa7-b8   Be6-c8   Ne5-f7   Rf8xf7
                                   Rf2xf7   Qh6-d6
    942559   8      27.6    +1.96  d4-d5    c6xd5    Qe3-a7   Kc8-d8
                                   Qa7-b8   Be6-c8   Ne5-f7   Rf8xf7
                                   Rf2xf7   Qh6-b6   Kg1-h1   Qb6-d6
   1162143   8:     33.4    +1.96  d4-d5    c6xd5    Qe3-a7   Kc8-d8
                                   Qa7-b8   Be6-c8   Ne5-f7   Rf8xf7




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