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Subject: Re: Nice endgame trap 'Dolle Toren' (formated)

Author: Richard Pijl

Date: 02:38:22 05/28/02

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On May 28, 2002 at 05:25:16, Vincent Lejeune wrote:

>On May 27, 2002 at 20:05:19, pavel wrote:
>
>>Hi,
>>
>>I don't know the proper English term for it but in Dutch it is called 'Dolle
>>Toren' (means something like mad rook)
>>Basically one party is in a stalemate position except for one rook. The party
>>with the rook tries to force his opponent to take the rook by giving continuous
>>check. Such a position could emerge from the following position (from a testgame
>>KnightX-Baron):
>>
>>[D]8/4kp1Q/5p2/4p3/5n2/3r4/r7/4R2K b - -
>>
>>The trap is 1..Rh3 2.Qxh3 Nxh3 3.Rxe5 and white continues to give check.
>
>Are you sur it's a draw here ? there are several possibilities to avoid the
>check with moving the pieces who stalemates the king

I'm sure. White can force check always on positions where black does not get the
opportunity to capture the rook with a piece other than the king.
>
>
>>Much better would be 1..Kd6 and the trap is disabled.
>
>What's the diffirence between the king on d6 and d7 ?
>
I think you mean the difference between d6 and e7? The difference is that white
cannot take on e5 with check.

>
>>The latest Crafty (18.15) cannot find the solution in a reasonable amount of
>>time (at least not on my machine (Mobile P-II 500Mhz), it's at ply 15 after 68
>>minutes).
>>It's current pv:
>>
>>15 68:09 -5.31 1..Rb2 2.Qf5 Rh3+ 3.Qxh3 Nxh3 4.Rxe5+ Kd6 5.Rd5+ Kc6 6.Rd6+ Kb7
>>7.Rxf6 Rf2 8.Rb6+ Kc7 9.Rc6+ Kd8 <HT>
>>
>>What does your program find?
>>
>>Richard.



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