TicTacToe is a board game. Played by 2 players, using a 3 x 3 checkered board. One player marks "x" and the other marks "o". The starting player marks with an x and the next player with an o, so on alternately. The challenge of the game is to make a row of xxx or ooo, horizontally-vertically-diagonally. The winner is the one who succeeds first in making a row of xxx or ooo
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