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Subject: Re: I need help with Search/Selective Extension

Author: Uri Blass

Date: 05:47:03 08/25/02

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On August 25, 2002 at 08:00:53, scott farrell wrote:

>Some more questions.
>
>I have fractional depths going now, so I can do a partial extension for
>recpatures etc.
>
>I tried extending straight after doMove, if it is a checking move do a SE (or
>partial), but it really blew out the number of nodes.
>
>I'll put some stats in to see what is going on, but some more questions.
>
>During null-move searching should SE be disabled?
>During non PV should it be disabled? (I guess not)
>How about during IID searches?
>
>I guess I'll struggle on.
>
>Scott

It should be disabled in most of the tree if you want them to be productive
because singular moves are often result of stupid tactical mistakes.

Example:It does not make sense to extend singular moves after lines like
1.e4 e5 2.Nf3 Qh4

Uri



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