High Quality Content by WIKIPEDIA articles! The Chessmaster series started in 1986 with The Chessmaster 2000 by The Software Toolworks. It was published for Amiga, Apple II, Atari 8-bit, Atari ST, ZX Spectrum, Commodore 64, Macintosh, and DOS the game had a chess engine written by David Kittinger, and The manufacturer rated the game at 2000 Elo USCF, in reality it plays at approximately 1550-1600 Elo (1750 -1800 USCF) . .This was a very popular game back then with only DOS functioning on modern computers, but not very well, not because of the game, the game was always solid, but because of an ill fated decision by microsoft only to give the PC's 640kb conventional memory. For this reason the program frequently made weaker moves in the higher depth, because it simply ran out of memory. This game was never patched to recognize extended memory, but however this can work very good inside the DOSBOX emulator.