Author: Ernst A. Heinz
Date: 13:04:58 12/22/00
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Hi Dann,
>Has anyone tried this:
>
>Exhaustive search (NO Null move pruning) out to some arbitrary ply from the root
>{e.g. ply 5} and then increasingly aggressive Null move pruning forward from
>there [perhaps with a linear increase in aggressiveness out to some level]
>?
If done it as suggested by you, the program will run into severe
inconsistency problems when using hashed information from the
transposition tables. Instead, you rather have to use a layer of
_remaining depth_ where you change your selectivity.
Just re-read my article on "How DarkThought Plays Chess" from 1997
where I already described the layering technique for extensions
and null moves.
A preprint of the article is available online from my WWW pages at
http://supertech.lcs.mit.edu/~heinz/.
=Ernst=
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