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Subject: Re: Extensions.

Author: Uri Blass

Date: 23:56:33 08/15/03

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On August 16, 2003 at 02:34:13, macaroni wrote:

>Recently I have been fiddling on extensions with my program. Usually, in an
>average middlegame position it will think ply 7-8 plys (in about 6 seconds), but
>if I make my program unconditionally extend on every capture by 1 full ply, I
>manage 3-4 ply in this time!! This seems like a horrible drop (and isn't worth
>it, as my program misses even simple tactics with checks in them), is this
>normaly?

Yes

I even did not try to do it and I know that even extending 1 ply for every
capture recapture is very bad idea.

There are a lot of illogical captures and extending 1 ply for every capture
means also searching illogical lines

1.e4 Nf6 Qh5 Nxh5 is going to be extended.

It is better if you start with extending one ply only for checks.

Uri



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