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hashing, check extensions and depth

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Chan Rasjid

Joined: 09 Mar 2006
Posts: 522
Location: Singapore

Post subject: Re: hashing, check extensions and depth Posted: Mon May 28, 2007 8:53 am

Hello,

I think Muller's comment to just hash the actual depth to which a position is searched is normally sufficient in hashing and the rests will fall into proper perspectives.

Quote:

...Storing the extension information in the hash table might still be possible in this case,...

I doubt anyone do this. It would add too much complexity and, even if things can be maintained logically, there may not be any benefits or elo gain even if successful.

As long as there is hashing+ pruning+extention, it is not expected that a position that is re-searched will search the same tree as conditions change. This is the unavoidable problem of search instability that may be related to what you are trying to resolved.

Best Regards,
Rasjid
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Display posts from previous:

Subject	Author	Date/Time
hashing, check extensions and depth	Mike Adams	Sun May 27, 2007 8:32 pm
Re: hashing, check extensions and depth	H.G.Muller	Mon May 28, 2007 7:23 am
Re: hashing, check extensions and depth	Onno Garms	Mon May 28, 2007 8:10 am
Re: hashing, check extensions and depth	Chan Rasjid	Mon May 28, 2007 8:53 am

TalkChess.com Forum Index -> Computer Chess Club: Programming and Technical Discussions

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