Order and Chaos
Order and Chaos is a variant of the game tic-tac-toe. It was introduced by Stephen Sniderman in Games Magazine in 1981.[1]
The game is unique in that both players, called Order and Chaos, control both Xs and Os. Order, going first, aims to get five like pieces in a row (vertically, horizontally, or diagonally) on the 6×6 board, while Chaos aims to fill the board without completion of a line of five like pieces. Once played, the pieces cannot be moved, and thus Order and Chaos can be played with pencil and paper.
Strategy
As in gomoku, an open-four (4-of-a-kind with two open ends) is an unstoppable threat, which Chaos must watch for. A good strategy for Order is to create spaces in which either an X or an O brings order, making it undesirable for Chaos to play there and limiting his mobility.