Tic Tac Toe

Tic-Tac-Toe (also known as noughts and crosses or Os and Xs) is a game for two players, X and O, who take turns marking the spaces in a 3 × 3 grid. The player who succeeds in placing three of their marks in a horizontal, vertical, or diagonal row wins the game. An early variation of tic-tac-toe was played in the Roman Empire, around the first century BC. It was called terni lapilli (three pebbles at a time) and instead of having any number of pieces, each player only had three, thus they had to move them around to empty spaces to keep playing. Tic-Tac-Toe is most often played by young children.