ZZZ-UNK-chess ROM Download can be obtained free for Sinclair ZX81 on EmuGames.net only. Play emulator game in English for the USA region. ZZZ-UNK-chess is a Sinclair ZX81 ROM that you can download to your computer or play online within your browser. You can also download roms such as J6showtmb and Bakusou Dekotora Densetsu 2 Otoko Jinsei Yume Ichiro that work on all devices including desktop and mobile. Be sure to rate the game if you enjoyed playing this ROM.