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Subject: Re: I am not sure if it is a good problem

Author: Mike S.

Date: 10:57:28 02/27/00

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On February 27, 2000 at 12:12:10, Mark Young wrote:

>(...)
>8/5pk1/5pn1/7p/4BPP1/4K2P/8/8 w - - 0 1
>>>>>NOT 1.gxh5, because black plays 1...Nxf4! = Draw - white has the wrong colored bishop.
>(...)
>What is the winning line? This looks to be a bogus test,
>all the moves look like
>a draw. Here is what Fritz is showing so far.

There is no special winning line. Did you read my posting below? 1.gxh5 gives a
*dead draw" 0.00 - wrong colored bishop, while other continuations *keep the
chances*. Maybe you should try Crafty. Watch it's evaluation after gxh5 Nxf4.
Fritz6 obviously doesn't understand it; he seems to "forget" Nxf4 after ply 15
and eventually switches back to gxh5 with evaluations >+0.5 in your results.

I'm sorry if this doesn't suit everyones taste; but it is good for testing this
special endgame knowledge. Some programs have it only in elementary positions,
like

Fischer - Keres
Zürich, 1959

[D]8/6k1/8/6K1/4bPB1/7P/8/8 w - - 0 69
NOT 69.f5? [69.h4 was played in the game] 69...Bxf5 is a draw for the same
reason as above. Most programs choose 69...Bxf5 immediatly (they should do it
without TB's also).

Regards,
M.Scheidl



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