Play Connect Four online in your browser. Choose two-player mode or an AI difficulty, press Start Game, then drop discs into the board and connect four in a row to win.

Play Connect Four

Drop discs, make four in a row, and watch for traps.

Press Start Game
The starter is chosen randomly.
Red
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Connect Four Rules

  • Connect Four is played on a 7-column by 6-row board. Players take turns dropping discs into one of the columns. Each disc falls to the lowest available space in that column.
  • The goal is to connect four of your own discs before your opponent does. A winning line can be horizontal, vertical, or diagonal.
  • In this version, the starting player is chosen randomly when you press Start Game. If you are playing against the AI, either you or the computer may make the first move.
  • A round ends when one player connects four discs or when the board is completely full with no winner, which results in a draw.

Game Modes

  • Two Players: Play against another person on the same device. Take turns dropping red and yellow discs into the board.
  • AI: Normal: A casual computer opponent. It can take obvious wins and block simple threats, but it still makes some mistakes.
  • AI: Hard: A stronger AI opponent that plays more carefully. It looks for tactical moves, blocks dangerous threats, and avoids simple traps.
  • AI: Impossible: The toughest AI mode. It searches ahead, evaluates board positions, and plays much more strategically.

Strategy Tips

  • Start near the center of the board. Center columns create more possible winning lines than edge columns, so they are usually more valuable.
  • Watch your opponent’s threats. If they have three discs in a row with an open space, you may need to block immediately.
  • Try to create two threats at once. A strong Connect Four tactic is setting up a position where you can win in more than one place on your next turn.
  • Think vertically and diagonally, not only horizontally. Many beginners focus on side-to-side lines and miss diagonal wins.
  • Avoid playing a column that gives your opponent an instant win. Before dropping a disc, check whether your move creates a winning spot for the other player.
  • In advanced play, plan several moves ahead. Sometimes the best move is not the one that creates an immediate threat, but the one that forces your opponent into a bad response.a

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