The Chafitz Inc. Boris 2.5 chess game module you can also obtain as Sargon 2.5 on a Modular Games System (“MGS”). Boris 2.5 Modular Game System module played in September, 1980 in a North American Tournament held in San Jose, California. MGS Boris 2.5 finished tied in 2nd place together with Boris Experimental. Boris Experimental a chess program written by Larry Atkin and David Slate was later in 1981 renamed to Morphy and sold as a module for use with Chaftiz MGS and Great Game Machine (“GGM”). Winner of this 1980 North American Tournament was the Fidelity Electronics Inc. Champion Sensory Chess Challenger.
Boris 2.5 works with Chafitz Modular Game System and Chafitz Great Game Machine. Boris 2.5 and Sargon 2.5 are the same chess programs but with different names, perhaps initially planned to target different World markets with for example Sargon 2.5 for Europe and Boris 2.5 for North America. Or possibly the name change is a result of Dan & Kathe Spracklen leaving Chafitz and joining Fidelity Electronics.
Boris 2.5 is compatible with Modular Game System (“MGS”) and Great Game Machine (“GGM”).