@SquawkBox; I've created a standalone disk for you that doesn't require "WB 1.1/1.2 Extras disk with AmigaBASIC".
A file named "
Chessmate v1.2 (1986)(Dark Horse).zip" is now in The Zone!
Warning... the game is flakey... if you move a piece where is shouldn't be able to go the system will guru.
Happens with the original also, no matter what A500 Quickstart you use.