ZX Spectrum Chess
ZX Spectrum Chess, (Chess, Masterchess)
a chess program for the ZX Spectrum by Anthony Adam, written in Z80 assembly language, distributed in 1982 by Psion Software with Mikro-Gen, and Sinclair Research, not to confused with the Spectrum Chess program by Artic Computing . Apparently, the program was forerunner of the 1984 Master Chess release for Amstrad CPC by Amsoft / Mikro-Gen . In 1987, a Mastertronic program named Master Chess was also available not only for Z80 but also 6502 computers  for instance Atari 8-bit and Commodore 64.
- Chess - World of Spectrum
- Spectrum 48K - Old Home Computer Chess Games Collection - ZX Spectrum Chess from The Spacious Mind