About Connect Four
Connect Four was invented by Howard Wexler and Ned Strongin and first sold commercially by Milton Bradley in 1974. It became an immediate classic — simple enough for children, deep enough for adults, and quick enough for a game that can be played anywhere. The two-player format made it perfect for competitive play, and it remains one of the best-selling board games of all time, with hundreds of millions of copies sold across five decades.
Like Tic Tac Toe, Connect Four is a solved game — with perfect play, the first player always wins. This was proven mathematically in 1988 by James Allen and Victor Allis independently. However, the solution requires playing up to 41 moves into a game with billions of possible states, making it far more demanding in practice. Against a non-perfect opponent, the outcome depends heavily on strategic skill and pattern recognition.
How to Play
You play as Red against the Purple AI. Click any column to drop your disc — it falls to the lowest empty row. Players alternate turns. The first to connect four discs in a row (horizontally, vertically, or diagonally) wins. If all 42 cells fill without a winner, the game is a draw.
- The grid is 7 columns wide and 6 rows tall — 42 total cells
- Discs always fall to the lowest available row in the chosen column
- A full column cannot receive any more discs
- Win conditions: any four consecutive same-colour discs in a row, column, or diagonal
Strategy Tips
- Control the centre column. The centre column participates in more winning combinations than any other. Seizing it early — or denying it to your opponent — is the first principle of strong play.
- Build low, win high. Threats at the bottom of the board are more dangerous because they restrict your opponent's future moves. Work from the bottom rows upward.
- Create double threats. Set up two separate rows of three simultaneously — your opponent can only block one, and you complete the other. This is the Connect Four equivalent of a fork.
- Think diagonally. Diagonal connections are the hardest to spot and defend. Building diagonal threats alongside horizontal ones multiplies your opponent's defensive burden.
- Watch even/odd rows. Advanced players use the even/odd row strategy — controlling which parity their winning threats fall on can force wins regardless of what their opponent does.
Why Connect Four Develops Strategic Thinking
Connect Four requires players to simultaneously plan their own attacks and anticipate their opponent's threats — up to five or six moves ahead at a high level. This forward planning exercises working memory and abstract reasoning. The game's visual nature also trains pattern recognition: experienced players spot winning and losing configurations at a glance, much like how chess players read board positions. Research on two-player strategy games shows significant improvements in planning ability and inhibitory control with regular play.
Frequently Asked Questions
Is the first player guaranteed to win with perfect play?
Yes — Connect Four is a solved game where the first player always wins with perfect play, assuming they start in the centre column. This was mathematically proven in 1988. In practice, few players achieve perfect play, so the game outcome still depends heavily on skill.
How many possible games are there?
Approximately 4.5 trillion possible Connect Four positions exist, compared to 362,880 in Tic Tac Toe. This scale makes exhaustive solving much harder and means the game retains practical strategic depth that Tic Tac Toe lacks.
Can the game end in a draw?
Yes — if all 42 cells fill without either player making four in a row, the game is a draw. Draws are unusual but do occur, especially between evenly matched players who both defend well without creating decisive threats.