# Problem 702. Play Tic Tac Toe : No Losses Allowed

Let's play a friendly game of Tic Tac Toe

Create an efficient algorithm to Never Lose.

The Player may be either the first or second to play.

Initial board is zeros(3). Computer moves are 1s and Player moves are 2s.

Player output is an integer 1:9 to identify array index position

``` 1 4 7
2 5 8
3 6 9```

Example game play:

``` Input:        [1 0 0; 0 0 0; 0 0 0]  % Computer playing first in this example
Output:        5                     % Player return value
Yields :      [1 0 0; 0 2 0; 0 0 0]  % Computer then picks position 2.
Second Input: [1 0 0; 1 2 0; 0 0 0]  % Computer's second move shown.```

Passing score is never losing.

The contest engine is almost Random - about 4000 times. (<12% of Time-Out)

Creating the perfect tic-tac-toe engine seemed unnecessary.

On a loss the losing board will be shown

Follow-up game will be WOPR:Global Thermonuclear War.

### Solution Stats

9.23% Correct | 90.77% Incorrect
Last Solution submitted on Apr 30, 2024

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