Chessmaster, The (USA) (Rev A) is a revised version of the Chessmaster game for the Nintendo Game Boy released in the USA. The 'Rev A' designation suggests improvements or bug fixes compared to the initial release, indicating potential gameplay refinements or enhancements. The core chess gameplay is likely unchanged, but there might be improvements in the user interface, AI, or overall game stability.  To find out who developed and published the game, additional research into the release notes would be required.

Chessmaster, The (USA) (Rev A)

Chessmaster, The (Europe)