REBEL was a world champion

chess program In computer chess, a chess engine is a computer program that analyzes chess or chess variant positions, and generates a move or list of moves that it regards as strongest. A chess engine is usually a back end with a command-line interface with ...

developed by Ed Schröder. Development of REBEL started in 1980 on a

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, and it was ported many times to dedicated hardware and the fastest

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s of the day: *1980s – Running on a TRS-80,

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, and inside of

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brand dedicated chess computers, it won the

Dutch open computer chess championship The Dutch pencomputer chess championship was a chess tournament for computer chess programs held from 1981 to 2012. It was organised yearly by the CSVN (Computer Chess Association of the Netherlands) around October or November. Champions : Refe ...

four times. *1991 – Ported to the

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and named Gideon, it won the

World Microcomputer Chess Championship World Computer Chess Championship (WCCC) is an event held periodically since 1974 where computer chess engines compete against each other. The event is organized by the International Computer Games Association. It is often held in conjunction with ...

. *1992 – Gideon won the

World Computer Chess Championship World Computer Chess Championship (WCCC) is an event held periodically since 1974 where computer chess engines compete against each other. The event is organized by the International Computer Games Association. It is often held in conjunction with ...

, the first time a microprocessor came ahead of a field of

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, supercomputers, and custom chess hardware. *1990s – REBEL was ported to

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and then Microsoft Windows and sold commercially **1997 – REBEL won a match with GM Arthur Yusupov 10.5–6.5, the first successful challenge of a

chess grandmaster Grandmaster (GM) is a title awarded to chess players by the world chess organization FIDE. Apart from World Champion, Grandmaster is the highest title a chess player can attain. Once achieved, the title is held for life, though exceptionally it has ...

by a commercial program. **1998 – REBEL won a match with GM

Viswanathan Anand Viswanathan "Vishy" Anand (born 11 December 1969) is an Indian chess grandmaster and a former five-time World Chess Champion. He became the first grandmaster from India in 1988, and is one of the few players to have surpassed an Elo rating ...

5–3 (but lost 0.5–1.5 in the standard time control section of the match). He was rated number two in the world at the time. *2004 – Ed Schröder retired, releasing the last version of REBEL as the

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chess engine In computer chess, a chess engine is a computer program that analyzes chess or chess variant positions, and generates a move or list of moves that it regards as strongest. A chess engine is usually a back end with a command-line interface with ...

Pro Deo.

External links

Ed's recollection of REBEL's history
* ttp://members.home.nl/matador/Inside%20Rebel.pdf "How REBEL Plays Chess" by Ed Schröder(

PDF Portable Document Format (PDF), standardized as ISO 32000, is a file format developed by Adobe in 1992 to present documents, including text formatting and images, in a manner independent of application software, hardware, and operating systems. ...

)
Rebel
(Chess Programming Wiki) Chess engines