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- Newsgroups: gnu.chess
- Path: sparky!uunet!mcsun!sunic!sics.se!roland
- From: roland@sics.se (Roland Karlsson)
- Subject: Re: Iterative Deepening (The true story)
- In-Reply-To: jon@cas.org's message of Mon, 25 Jan 1993 16:03:40 GMT
- Message-ID: <ROLAND.93Jan25214858@bugs.sics.se>
- Sender: news@sics.se
- Organization: Swedish Institute of Computer Science, Kista
- References: <C15r40.D1r@sju.edu> <21659@ucdavis.ucdavis.edu> <JON.93Jan25110340@cas.org>
- Distribution: gnu
- Date: Mon, 25 Jan 1993 20:48:58 GMT
- Lines: 18
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-
- The original reason for iterative deepening was to speed up alpha-beta
- pruning. The pruning is most efficient when the moves to try is
- sorted best first. One way of approximize this is to first search a
- few plies, sort the result best move first, and then search deeper.
-
- Iterative deepening also makes it easier to play according to a chess
- clock. Stopping a deep search, without having the result from a more
- shallow one is a catastrophe.
-
- Transposition tables and iterative deepening is two different methods
- to improve chess playing. But both can be used without the other.
-
-
- --
- Roland Karlsson SICS, PO Box 1263, S-164 28 KISTA, SWEDEN
- Internet: roland@sics.se Tel: +46 8 752 15 40 Fax: +46 8 751 72 30
- Telex: 812 6154 7011 SICS Ttx: 2401-812 6154 7011=SICS
-