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Subject: Re: Interesting quiescence position

Author: Robert Hyatt

Date: 06:31:54 02/21/04

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On February 21, 2004 at 08:23:59, Andrew Wagner wrote:

>The position is [D]r2q1rk1/ppp4p/2n2b2/3bppp1/Q7/P2PBNP1/1P2PPBP/R4RK1 w - - 0 1
>
>The idea of course is to find Bxg5 Bxg5 Nxg5 Bxg2 (Qxg5 Bxd5) Qh4!(threatening
>mate while defending the knight) 1-0
>
>and I'm sure most engines would find that very easily. The question is a.) Is
>this a move quiescence should find, and how? and b.) How do you keep from
>pruning this move via SEE or MVVLA if you have them implemented?

I would hope no one does pruning if they use MVV/LVA.  It doesn't provide enough
information for reliable pruning decisions...

As far as your question goes, Crafty won't spot Bxg5 until depth 8 so my
q-search has no chance whatsoever.



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