Connect Four

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Your turn — you are red.

Tap any column to drop your disc

How to Play

You are red; the computer is yellow.
Tap a column to drop a disc — it falls to the lowest free slot.
First to line up four in a row wins.
Lines count horizontally, vertically and diagonally.
Difficulty changes how many moves ahead the AI searches.

Beating the AI

Control the centre column — it is part of the most possible lines.
Watch for double threats: two ways to complete four at once cannot both be blocked.
Build threats on odd rows so you keep the initiative.

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About This Connect Four

The opponent here is not a random mover. It runs a minimax search with alpha-beta pruning over the full seven-column board, evaluating every position by how many open threes, open twos and centre column discs each side controls. On Hard it looks seven plies ahead, which is enough to punish a single careless move.

That said, Connect Four is a solved game — with perfect play the first player wins by dropping in the centre column. The AI plays strongly but not perfectly, so it stays beatable while still making you think.

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