Championship Chess, (TimeWare Chess)
a chess program by Chris A. Thornton for the Timex Sinclair 1000/Timex Sinclair 1500 and Sinclair ZX81 with 16K expansion , shipped in the US by Reston Publishing Company since 1983 . Championship Chess was likely based on the Artic Computing programs ZX Chess and Spectrum Chess, written a Z80 machine language.
- Championship Chess: Software for the Timex Sinclair 1500, Timex Sinclair 1000 and Zx-81 Computers: Thornton, Chris: Amazon.com
- Championship Chess – Timex/Sinclair Computers