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Subject: Re: Testposition - Bishop Rivalry

Author: Miguel A. Ballicora

Date: 14:17:10 03/01/01

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On March 01, 2001 at 16:02:38, Robert Hyatt wrote:

>On March 01, 2001 at 13:38:03, Sune Larsson wrote:
>
>>
>>  [D]8/6p1/P1b1pp2/2p1p3/1k4P1/3PP3/1PK5/5B2 w - - 0 3
>>
>>  Queckenstadt (Kvekkenstedt?) 1922
>>
>>  The two Bishops were fighting their own battle, while their Kings
>>  were watching. It was all about proving suited for the elevation
>>  to Archbishop. The struggle was tense when suddenly one of the Bishops
>>  realized that he could achive his goal by actually giving himself up.
>>  As a true religious man he did so. Transfered himself to g2 (1.Bg2!)
>>  and faced his rival. Left with no choice his shocked brother in faith
>>  entered the same square (1.-Bxg2) and found himself in a deserted land.
>>  After 2.e4! the door was closed. Desperately the Bishop tried to open
>>  it again, but could he do it in time?
>>
>>
>>  Test: If your program could search deep enough to find the win for white.
>>        If not - try it with 1.Bg2 played.
>>
>>  Sune
>
>
>I'll trust your comment, but when I looked it as a human I didn't see the
>win.  IE I assume the point is Bg2 and black is forced to play Bxg2 or else
>leave the diagonal letting the a-pawn run.  But what about Bg2 Bxg2, e4 locking
>the bishop out, but then black plays f5?  Doesn't the bishop then get back into
>the game, and with black being a piece ahead, I don't see how white does more
>than draw at best and possibly lose the game?

Bg2 Bxg2/ e4 f5/ gxf5 exf5/a7 fxe4/d4! e3/ dxe5 and black bishop cannot
stop both pawns. King can't help since Kc5 is not possible to rush toward the
e pawn. Kb5-Kc6 won't help because it closes the h1-a8 diagonal!
beautiful!
This might take 17-18 plies since black can push the horizon with e2.
Push pawn extensions might help right?

Regards,
Miguel


>
>Bob



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