# That's How You Prevent A Fork

Logic Level 1

It is $$O$$'s move in the Tic-Tac-Toe game (above). Which of the moves gave above (1, 2, 3, 4, 5) is the best move for $$O$$?

Assume both players intend to win the game and plays optimally.

###### Source: University of South Carolina High School Math Contest, 1991
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