Players take turns dropping colored discs into a vertical grid. The disc falls to the lowest available slot in the chosen column. The first player to get four of their discs in a row horizontally, vertically, or diagonally wins the game.
What are good strategies for winning Connect Four?
Try to control the center column since it gives you the most opportunities to build connections in every direction. Also, look for chances to set up a double threat where you have two ways to win on the same turn, which forces your opponent into a losing position.
Is Connect Four a solved game?
Yes, Connect Four was mathematically solved in 1988 by Victor Allis. The first player can always win with perfect play by starting in the center column. However, against imperfect opponents, the game remains fun and challenging.
Can I play Connect Four online for free?
Yes! PlayBrain's Connect Four is completely free to play in your browser. No downloads, no sign-ups required. You can play against an AI opponent with multiple difficulty levels.
Can I play Connect Four with a friend online?
Yes! Click the 'Play with Friend' button to create a game link. Send it to your friend via WhatsApp, text, or any messenger. When they open the link, the game starts automatically. No accounts or downloads needed.
What age is Connect Four suitable for?
Connect Four is great for ages 6 and up. It teaches strategic thinking and pattern recognition. Younger children can enjoy the simple mechanics of dropping discs, while older players can explore deeper strategies.
How does the AI opponent work in this game?
The AI uses the minimax algorithm with alpha-beta pruning to evaluate possible moves. On higher difficulty levels it looks further ahead, making it harder to beat. Easy mode makes occasional random moves so beginners can enjoy the game too.
Connect Four was invented by Howard Wexler and Ned Strongin and first published by Milton Bradley (now Hasbro) in 1974. It quickly became one of the world's best-selling two-player board games, moving over 50 million copies. In 1988, Victor Allis mathematically solved the game, proving that the first player can always force a win with perfect play by starting in the center column. What sets Connect Four apart from other connection games is its vertical gravity mechanic: discs fall to the lowest open slot, adding a spatial planning layer that pure grid games lack. Despite being solved on paper, the branching possibilities keep real matches exciting and unpredictable for human players.
How to Play
Click a column to drop your red disc into the lowest available slot.
Use arrow keys to highlight a column and press Space or Enter to drop.
Connect four of your discs in a row horizontally, vertically, or diagonally to win.
Block your opponent's connections while building your own to secure victory.