Tic-Tac-Toe vs AI
Tic-Tac-Toe vs AI is a free online tool that pits you, as X, against two computer opponents: Easy, which makes human-like mistakes you can punish, and Unbeatable, a perfect minimax engine that can never lose — the best you can do against it is a draw. Your win/loss/draw tally is tracked per difficulty and remembered between visits.
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You (X)
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Draws
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AI (O)
ROUND 1
Your move — you're X.
Opponent
Starts
Easy takes a win when it sees one, but often forgets to block yours — beat it, then try again. Unbeatable evaluates every line with minimax plus alpha-beta pruning, so it always answers perfectly; a draw is a victory of sorts. The AI always plays O, and your stats are kept separately per opponent.