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Subject: Re: Nice positional pearl! - Bug in King or Wb2Uci?

Author: F. Huber

Date: 08:54:22 01/22/05

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On January 22, 2005 at 10:07:51, Ingo Bauer wrote:

>Hello
>
>I want to share this nice position. Most engines have a hard time to avoid Qxc5
>but if you make the move (QxQ KxQ) manualy it is easy for the most.
>
>(Progs have a hard time going to a certain depth with th equeens on baord, even
>if it is just a capture and recapture, but if the Queens are off the go to a
>great depth quite fast)
>
>[D]2q1k3/1p3p2/4P1pp/P1Qp3P/3K1P2/1P6/8/8 b - -
>
>Have fun (I had!)
>Ingo

Hello Ingo,

I had absolutely no fun - but for a completely other reason! :-(

I tried this position with my usual King-installation (King 3.33 under Arena
with Wb2Uci-adaptor), and got a really strange behaviour (better BUG):

In normal play mode _I_ made the first black move Qxc5, and after that the
King stops immediately its thinking a depth 3!?
(no more thinking infos, no more CPU activities of the King, and the protocol
file of Wb2Uci shows only ´.´ from that moment on)

So I made some tests, but until now its totally unclear for me what or where
is the reason for this problem:
1) it works in analyze mode, but not in normal play mode
2) it works for King installed as WB-engine, but not as UCI-engine with Wb2Uci
3) the same problem occurs with all 3 Kings (3.12, 3.23 and 3.33)
4) it works for ProDeo as UCI-engine with exactly the same version of Wb2Uci

After 1) and 2) I would think it´s a problem of the Wb2Uci-adaptor, but OTOH
as it works in 4) for ProDeo under the same conditions, this seems not to be
the reason - so I´ve really no idea ...

Maybe anyone here could try and confirm this problem?

Regards,
Franz.



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