Tic-tac-toe (or Noughts and crosses, Xs and Os) is a paper-and-pencil 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 respective marks in a horizontal, vertical, or diagonal row wins the game.An early variant of Tic-tac-toe was played in the Roman Empire, around the first century BC. It was called Terni Lapilli 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. The game's grid markings have been found chalked all over Rome. However, according to Claudia Zaslavsky's book Tic Tac Toe: And Other Three-In-A Row Games from Ancient Egypt to the Modern Computer, Tic-tac-toe could originate back to ancient Egypt. Another closely related ancient game is Three Men's Morris which is also played on a simple grid and requires three pieces in a row to finish.
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Also known as
Tic-tac-toe, tick-tat-toe, o tit-tat-toe Noughts and crosses, hugs and kisses Drei Gewinnt, Kreis und Kreuz, XXO Ta-te-ti, tres en raya, juego del gato, triqui Morpion Boter, kaas en eierenKryds og bolle Luffarschack o Tripp trapp trull Ristinolla, Jätkänshakki Trips-traps-trull X şi zero Jogo da velha, jogo do galoΤρίλιζαZero kata, Phool aur chaukadiMaru batsu (円伐), Sanmoku narabe (三目並べ) Морски шахKółko i krzyżykКрестики-ноликиBondesjakk, Tripp trapp tresko, Tre på radאיקס מיקס דריקסאיקס עיגול križić-kružić Jin Zi You Xi