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Colossus Chess,
the series of chess programs by Martin Bryant developed from 1983 on an Apple II in 6502 Assembly, based on Bryant's former program White Knight. Colossus Chess 2.0 was the first commercial release in 1884 for the Commodore 64 and this and subsequent versions for other 6502, Z80, 68000 and 8086 based home and personal computers, such as Atari 8-bit, BBC Micro, Amstrad CPC, ZX Spectrum, Atari ST, Amiga, and finally for the IBM PC. Colossus Chess pioneered a sophisticated GUI with an optional 3D chessboard, and lot of new features for that time, and has become one of the best selling chess programs of all time [1]. Colossus Chess played the European MCC 1983 in London and the WMCCC 1984 in Glasgow.
Colossus Chess 4.0 3D board on C64 [2]

Colossus Chess UCI

While the work on the commercial Colossus Chess series finished in 1991, Martin Bryant started a completely new and freely available Windows UCI version in 2004, first written in C# then converted to C [3], released in 2006 [4] through 2008 [5].

See also


Forum Posts

External Links

Colossus 2.0

Colossus 3.0

Colossus 4.0

Colossus X



  1. ^ Chess Computers - The UK Story by Mike Watters
  2. ^ Colossus Chess from Wikipedia
  3. ^ Colossus Chess from Wikipedia
  4. ^ Free Chess Downloads by Ed Schröder
  5. ^ Colossus 2008b available by Martin Bryant, CCC, September 23, 2008
  6. ^ Re: Old programs CHAOS and USC by Dann Corbit, CCC, July 11, 2015
  7. ^ Lorenz cipher from Wikipedia

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