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by pebcakID10T 1335 days ago
The computer AI code is in this file: http://flydaddy.net/games/connect-four/js/computerOpponent.j...

Basically when it’s the computer’s turn it evaluates every possible move and assigns an attack and defense value for each move. The attack value is based on how many in a row and whether it can win on next turn, and the defense value is how many opponent’s chips in a row and whether it will lose on opponent’s turn. And if 2 or more moves are equal, favor the move closest to the center of the board.