Large Tic Tac Toe Tactics Number 3

Logic Level 3

You're playing a large Tic Tac Toe, with 5 in a row to win. It's your turn as \(\color{blue} O \).

What's the least number of moves you can make to win the game?

Assume the player \(\color{red} X\) makes all the best possible moves to stay in the game (for as long as possible).

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