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Subject: Re: Threat extensions

Author: Daniel Shawul

Date: 23:15:42 09/26/04

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On September 27, 2004 at 01:03:39, Sergei S. Markoff wrote:

>>Sergei -- when you refer to the leaf and pre-leaf we assume you
>>mean depth == 0 and depth == 1 respectively. Please correct this
>>if we are wrong.
>
>You're right. The main idea is to decrease rate of cases in which after threat
>we're going into quiescence with it's null move. Pre-leaf (depth==1) nodes are
>important because it's preferable to detect threat chains.

after reading what you and tord wrote some time ago on this extesnion,
i tried it. First time i did for the whole big depths and it slowed down
my search considerably. then i restrained it to depth < 2*UNITDEPTH
and it is working fine now.

Another thing i tried is , i search the "mate threat move" and the other
"threat move" next to hashtable move. This also improved my move ordering.

thanks for sharing your ideas!

daniel




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