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Space-efficient Indexing of Chess Endgame Tables

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Nalimov, E. V., Haworth, G. M. and Heinz, E. A. (2000) Space-efficient Indexing of Chess Endgame Tables. ICGA Journal, 23 (3). pp. 148-162. ISSN 1389-6911

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Official URL: http://ticc.uvt.nl/icga/journal/

Abstract/Summary

Chess endgame tables should provide efficiently the value and depth of any required position during play. The indexing of an endgame’s positions is crucial to meeting this objective. This paper updates Heinz’ previous review of approaches to indexing and describes the latest approach by the first and third authors. Heinz’ and Nalimov’s endgame tables (EGTs) encompass the en passant rule and have the most compact index schemes to date. Nalimov’s EGTs, to the Distance-to-Mate (DTM) metric, require only 30.6 × 10^9 elements in total for all the 3-to-5-man endgames and are individually more compact than previous tables. His new index scheme has proved itself while generating the tables and in the 1999 World Computer Chess Championship where many of the top programs used the new suite of EGTs.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Science > School of Systems Engineering
ID Code:4562
Uncontrolled Keywords:chess, efficiency, endgame table, index, Nalimov
Publisher:The International Computer Games Association

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