This is a more advanced game of tic-tac-toe, involving nine active boards. The first player puts a marker on any spot in any board, but after that the board used is based off of the location of the last marker put. If Player X were to put a marker down in the center of Board 1, the next turn would be limited to Board 5; if Player O put a marker in the upper left of Board 5, the next turn would be limited to Board 1, and so on.