What is "ataxx"

Ataxx (also known by such names as Infection, SlimeWars and Frog Cloning) is a board game that first appeared in 1990 as an arcade video game by The Leland Corporation. It also appeared in 1990 as the video game Spot and later as the Microscope Puzzle from the 1993 CD-ROM game The 7th Guest. The game was invented by Dave Crummack and Craig Galley in 1988 and was originally called Infection. It was first programmed on Amiga, Commodore 64 and Atari ST.

Although Ataxx was sold as a video game and never as a physical game set, it can be played with a Reversi set.