Connect Four

Four in a row against an engine that thinks up to seven moves ahead.

0/3achievements

Your move0W 0L 0D

Your record

Engine	Won	Lost	Drawn
Easy	0	0	0
Medium	0	0	0
Hard	0	0	0

How to play

Drop discs into the columns. Four of yours in a row, across, down or diagonally, wins. You are orange; the engine is cyan. Turns alternate who starts.

The engine searches ahead with minimax and alpha-beta pruning: two moves on easy (and it sometimes blunders), four on medium, seven on hard. Every level takes a win and blocks one when it sees it.

Controls

Click / tap: Drop in a column
1 to 7: Drop in that column
← → Enter: Aim and drop

Achievements0/3

Junior opponent +25Beat the easy engine.
Code review +50Beat the medium engine.
Beat the machine +150Beat the hard engine.

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