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Connect Four
About Connect Four
Get four in a row to win. This free online game is part of our classic games collection and is designed for players of all ages.
- Difficulty: easy
- Average play time: 5 minutes
- No download or signup required
- Works on desktop and mobile devices
How to Play Connect Four
Drop discs into the grid to connect four of your colour horizontally, vertically, or diagonally before your opponent does.
Tip: Control the centre column — it gives you the most winning possibilities.
💡 Connect Four Strategy
- Open in the centre column. It participates in more possible four-in-a-rows than any other, and the player who takes it has a proven advantage.
- Build threats that share a piece. Two lines that both need the same square force a win — your opponent can only block one.
- Look above your move. Filling a square hands your opponent the one directly on top of it; check what that gives them before you play.
- Watch the diagonals. Almost every missed loss in Connect Four is a diagonal, because the eye tracks rows and columns naturally.
- Count to three, then block. Any three in a row with an open end must be answered immediately, even if it costs you your own plan.
🧠 What Connect Four Builds
Connect Four is fully solved — the first player wins with perfect play from the centre — which makes it an unusually clean introduction to game theory ideas like forced wins and zugzwang. For children it is often the first game where they experience planning a trap two moves ahead rather than reacting. The vertical gravity rule is what gives it depth beyond noughts and crosses.