Connect Four · 4 min
Connect Four: Control Useful Columns
Evaluate every drop by the lines it creates and the square it gives away.
Last updated: 2026-07-22 · Written and tested by Starbox EditorialRemember that pieces fall
You choose a column, not an arbitrary square. The piece occupies the lowest open cell, so every move also changes which square becomes playable above it. A harmless-looking drop can support an opponent’s winning diagonal on the next turn.
Check immediate threats first
Before attacking, scan horizontal, vertical, and both diagonal directions for a three-piece line with a playable fourth square. Take your own win immediately. If the opponent has one, block it. A square is only a real threat when gravity allows a piece to land there now.
Prefer central influence
Center columns participate in more potential four-piece lines than edge columns. Early central pieces can contribute to horizontal and diagonal plans on both sides. Still, central preference is secondary to a direct win, required block, or move that would make a dangerous square playable for the opponent.
Look one support move ahead
After choosing a column, ask what landing square you expose above your piece. If that new square completes an opponent line, your move is unsafe even if it creates a threat of its own. This one-ply support check prevents many avoidable losses on a compact board.
Return to the game with a clear method and compare like-for-like attempts.