Tic Tac Toe Play

节省纸张和乐趣与你的好友！

"Save paper and have fun with your buddy !!"

Tic-tac-toe (also known as noughts and crosses or 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 of their marks in a horizontal, vertical, or diagonal row wins the game.

The Tic Tac Toe is a great way to pass your free time whether you're standing in a line or spending time with your kids. You can play with friends while you waiting

for your meal at restaurant. Stop wasting your time and have a great fun with friends.

Rules

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Since the goal is to get 3 in a row, each person must switch taking turns, first X, then O. Players must use the board given to them, they cannot add extra sides on to

the board. In order to win, the 3 letters must all connect in a straight line in one direction, up or down, left or right, or diagonally.

A player can play a perfect game of tic-tac-toe (to win or, at least, draw) if they choose the first available move from the following list, each turn, as used in

Newell and Simon's 1972 tic-tac-toe program.

Win: If the player has two in a row, they can place a third to get three in a row.

Block: If the opponent has two in a row, the player must play the third themselves to block the opponent.

Fork: Create an opportunity where the player has two threats to win (two non-blocked lines of 2).

Blocking an opponent's fork:

Option 1: The player should create two in a row to force the opponent into defending, as long as it doesn't result in them creating a fork. For example, if "X" has two

opposite corners and "O" has the center, "O" must not play a corner in order to win. (Playing a corner in this scenario creates a fork for "X" to win.)

Option 2: If there is a configuration where the opponent can fork, the player should block that fork.

Center: A player marks the center. (If it is the first move of the game, playing on a corner gives the second player more opportunities to make a mistake and may

therefore be the better choice; however, it makes no difference between perfect players.)

Opposite corner: If the opponent is in the corner, the player plays the opposite corner.

Empty corner: The player plays in a corner square.

Empty side: The player plays in a middle square on any of the 4 sides.