Tic Tac Toe : Brain Puzzle

The most attractive and the smartest version of Tic Tac Toe : Brain Puzzle game ever! The simple rules: Tic Tac Toe is a very old game(that was born via paper-and-pencil) for 2 players, "X" and "O", who take turns marking the spaces in a 3x3 grid(sometimes it may be 4x4 or 5x5). Player who succeeds in placing three of their marks in a horizontal, vertical, or diagonal line will win the game.