Variant: Zombie Go

[isaiahstjohn]

Every N turns, M green zombie stones are placed at random. If a stone is horizontally, vertically, or diagonally adjacent to a zombie stone for more than X turns, the stone becomes a zombie stone.

[sigs]

For less randomness, zombies should be either placed by players and/or in the beginning; then there could be trade-offs and forced moved during the game into the zombies.

It could also be "tainted intersections" or "virus zones" rather than zombie stones.

This could be a case for feature of coloring not only stones but also background.