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a chess program by [[Chris Thornton]] for the [https://en.wikipedia.org/wiki/Timex_Sinclair_1000 Timex Sinclair 1000]/[https://en.wikipedia.org/wiki/Timex_Sinclair_1000#Timex_Sinclair_1500 Timex Sinclair 1500] and [[Sinclair ZX81]] with 16K expansion <ref>[https://www.amazon.com/Championship-Chess-Software-Sinclair-Computers/dp/0835907384 Championship Chess: Software for the Timex Sinclair 1500, Timex Sinclair 1000 and Zx-81 Computers: Thornton, Chris: Amazon.com]</ref>,
shipped in the US by ''Reston Publishing Company'' since 1983 <ref>[https://www.timexsinclair.com/company/reston-publishing-company/ Reston Publishing Company – Timex/Sinclair Computers]</ref>.
Championship Chess was likely based on the [[Artic Computing]] programs [[ZX Chess]] and [[Spectrum Chess]] programs, written a [[Z80]] [https://en.wikipedia.org/wiki/Machine_code machine language].
=See also=
