Drop your discs and line up four in a row — horizontally, vertically, or diagonally — before the computer does.
You are 🔴 Red. Click a column to drop your first disc!
Connect Four is the classic vertical strategy game where players take turns dropping colored discs into a 7-column, 6-row grid. At FunZon you can play it free against a computer opponent with three difficulty levels, from a forgiving Easy AI to a genuinely tough Hard mode that searches several moves ahead.
Unlike Tic Tac Toe's static 3x3 grid where you can click any open cell, Connect Four adds gravity to the mix — discs always fall to the lowest open slot in a column, so you're planning stacks and columns rather than individual cells.
You play as 🔴 Red and always drop first. Click anywhere in a column to drop a disc — it falls to the lowest empty slot in that column. The computer, playing 🟡 Yellow, responds automatically. The first player to connect four discs in a row — horizontally, vertically, or diagonally — wins. If the grid fills up with no winner, the game is a draw.
Easy: The computer often drops randomly and only occasionally plans ahead — great for beginners and kids learning the ropes.
Medium: The computer reliably takes winning moves and blocks obvious threats, using a shallow lookahead search most of the time.
Hard: The computer uses a deeper minimax search with alpha-beta pruning to evaluate multiple moves ahead, spotting hidden threats and double-traps. It's very tough to beat.
Because discs stack under gravity, you must think in columns and think ahead about what your next disc opens up for your opponent.
Spotting horizontal, vertical, and diagonal threats — including sneaky diagonal setups — sharpens visual pattern recognition.
Strong Connect Four play requires thinking two or three moves ahead, a great low-stakes way to practice deeper strategic planning than Tic Tac Toe requires.
Each game takes just a couple of minutes, making it perfect for a quick mental break or a rematch streak against the AI.
FunZon's Connect Four is free, fast-loading, and mobile-friendly, with a genuinely challenging Hard AI mode built using minimax search with alpha-beta pruning — the same family of technique used in classic game-playing AI research.
How do I drop a disc in Connect Four?
Click anywhere in a column and your disc drops to the lowest empty slot in that column, just like the physical game.
How strong is the Hard difficulty AI?
Hard mode searches several moves ahead using a minimax algorithm with alpha-beta pruning, so it reliably spots winning threats and blocks yours. It is very tough to beat but not mathematically perfect.
Do I always play first?
Yes, you always play the red discs and drop first in every new game.
Is my win streak saved?
Yes, your current streak and best-ever streak are saved locally in your browser and shown on the leaderboard.
Connect Four vs Computer is a quick, free way to sharpen multi-move strategic thinking on FunZon. Start on Easy, work your way up to Medium, and see if you can outsmart the Hard AI's lookahead search!