Matrix Tic-Tac-Toe is played on a ten by ten matrix in a manner similar to ordinary Tic-Tac-Toe. The player and the computer will alternately place a move at one of the matrix coordinates. Each will try to place five moves in a row to effect a win. The player will always be given the first move. This forces the computer to play defensively and gives the player a reasonable probability of winning. There are 192 possible win combinations using the ten by ten matrix as a play board.
MATTAC: Matric Tic-Tac-Toe was written in MACRO-10 for DEC systems; it was distributed by DECUS as Library Tape No. 1:P190, program 10-114.