# Tic-Tac-Toe

The game of Tic-Tac-Toe is  played in a large square divided into nine small squares.

[1] Each of two players in turn places his or her mark – usually X or O _ in a small square.
[2] The player who first gets three marks in a horizontal, vertical and diagonal line wins.
[3] A player will always place his or her mark in a line that already contains (a) two of his or her own marks or (b) two of his or her opponent’s marks – giving (a) priority over (b)

Assume that both the players are intelligent enough.

1. Who will win the game, O or X?

2. Which was the sixth mark and at which position?

### See our previous ‘Puzzles of the Day’:

Puzzle of the Day : 35

Puzzle of the Day : 34

• Nice instruction, thanks

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