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Subject: Re: A question of time

Author: Andrew Williams

Date: 04:40:18 01/24/02

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On January 24, 2002 at 04:47:30, guy haworth wrote:

>Would welcome sources of information on how chess-engines budget their time.
>

Mine allocates approximately 1/30th of the remaining time to the current move.
If there are fewer pieces on the board, it allocates about 1/24th of the
remaining time. Depending on the size of the increment, it increases the portion
allocated to the current move.

>Are the heuristics out there more 'conservative' than human players?  What
>criteria are used for departing from some norm-budget/move, assuming there is
>one?
>

Mine extends the amount of time a little for the first few moves out of the
opening book. It will also increase the allocation for the current move by up
to 400% for cases where the score starts to fall from one iteration to the next.
If the program is far ahead in scores, it is a bit less aggressive about
extending the allocation.

>Do chess engines modify their:
>
>  a)  opening books,
>  b)  search and/or evaluation methods
>
>according to the time regime for the game?
>
>Are chess-engines able to handle the increasing variety of time-regimes being
>defined now?  What time-regimes are there and is there an established notation
>for defining them?
>

Mine plays all its games in xboard, either in test matches at home or on ICC. It
plays G/something, possibly with an increment added each move. It is programmed
to play x moves in y minutes with an increment of z, but it has never done so.


>Thanks in advance for contributions.
>
>G

Andrew Williams




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