Tap any column to drop a counter (perfect on tablets/phones). Play 2-player or vs computer (easy/medium/hard), with undo, rematch, keyboard controls, stats, and shareable links.
Game settings
Choose a mode, then tap a column to play. Keyboard: ← → select column, Enter/Space drop, U undo, R rematch.
How to win at Connect 4
Connect 4 is simple to learn but surprisingly tactical. The centre columns matter because they create more possible lines of four. A common mistake is blocking only the obvious threat — strong players try to create a “fork”, where two winning threats appear at once.
This version is designed to be fast and mobile-friendly: tap any column to drop a counter, or use the keyboard on desktop. Use Share to send someone a link that opens the same setup (mode, difficulty, your colour, and first turn).
Connect 4 FAQ
How do I play Connect 4?
Take turns dropping counters into columns. First to connect four in a row (horizontal, vertical or diagonal) wins.
Does it work on tablets and phones?
Yes. Tap anywhere in a column to drop a counter. Buttons are sized for touch, and phones get a sticky action bar.
Can I undo a move?
Yes. Undo removes the last move. In Vs Computer mode, Undo removes the last two moves (yours + the computer’s).
How hard is “Hard” difficulty?
Hard uses a deeper search and prioritises stronger moves (like centre control) while preventing common traps.