Luminous Chess

Luminous Chess is a 1997 two-player chess program for 68k Macintosh written by Joseph J. Strout. Its distinguishing feature is a board whose squares are color-coded to show the influence of each piece, turning positional pressure into something you can read at a glance. It supports standard Chess and the Grand Chess variant.

Concept

The defining idea is the colored overlay on the board: each square is shaded according to which side controls or threatens it, giving newer players a visible map of tension across the position.

Variants

In addition to standard Chess, Luminous Chess supports Grand Chess, the larger 10x10 variant with additional pieces, played using the same influence-coloring display.

Limitations

The program is strictly two-player. There is no built-in computer opponent, so play requires either a second person at the same Mac or a partner taking turns.