Cumulus

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Cumulus, the second chess program by Jean-Christophe Weill and Marc-François Baudot, written in C with a few 8086 Assembly snippets. Cumulus played the WMCCC 1990, WMCCC 1991, and WCCC 1992, the Aegon 1993 and various Aubervilliers Rapid Open - the versions since WCCC 1992 already the Écume codebase, completely written in Assembly language.

=Description= from Don Beal's WMCCC 1991 report : Written by Jean-Christophe Weill, in association with Marc-François Baudot of Échec, this is a new program, only in development for 7 months, although it made its first appearance at the 1990 World Micro. Its evaluation function has some overlap with Échec, although Cumulus add hung-piece considerations, king safety and uses different definition of mobility. Its selectivity is driven by swap-off values and certain mate threats. Checks, promotion threats, and re-captures are extended.

=Selected Games= WCCC 1992, round 4, Cumulus 2 - Kallisto [Event "WCCC 1992"] [Site "Madrid, Spain"] [Date "1992.11.26"] [Round "4"] [White "Cumulus 2"] [Black "Kallisto"] [Result "1-0"]

1.d4 Nf6 2.Nf3 e6 3.e3 b6 4.Nbd2 Bb7 5.Bd3 Nc6 6.c3 a5 7.O-O Ba6 8.Bxa6 Rxa6 9.e4 Be7 10.e5 Nh5 11.Ne4 a4 12.Nfg5 g6 13.Qf3 O-O 14.Be3 Ra5 15.g4 Ng7 16.Qh3 h5 17.b4 axb3 18.axb3 Qa8 19.Rxa5 Qxa5 20.Nf6+ Bxf6 21.exf6 Ne8 22.gxh5 gxh5 23.Qg3 Kh8 24.Qf3 Kg8 25.Kh1 Qd5 26.Ne4 Qf5 27.Qxf5 exf5 28.Bh6 fxe4 29.Rg1+ Ng7 30.Rxg7+ Kh8 31.h4 d6 32.b4 b5 33.Kh2 Na7 34.Rg5 Re8 35.Bg7+ 1-0

=See also=
 * Échec
 * Écume

=External Links=

Chess Engine

 * Cumulus' ICGA Tournaments
 * Chess by Robert Byrne, New York Times, June 25, 1991 - on Chess Machine Gideon versus Cumulus, WMCCC 1991
 * A Short Story of JCW's Computer Chess Program by Jean-Christophe Weill

Misc

 * cumulus - Wiktionary
 * Cumulus (disambiguation) from Wikipedia
 * Cumulus cloud from Wikipedia
 * Terje Rypdal, Trilok Gurtu, Miroslav Vitouš, Clouds in the Mountain, YouTube Video

=References= Up one Level