Four in a Row

• Take turns dropping a disc into one of seven columns. It falls to the lowest empty space.
• Connect four of your discs horizontally, vertically, or diagonally to win. A full board without a winner is a draw.
• Play against three bot difficulties, pass the device between two players, or create an online room and share its link. Find opponent matches you with another waiting player.
• Online moves are checked by the server. Both players must press New game for a rematch; the starting player alternates. Leaving or disconnecting clears that online board.
• Tap a column or its arrow to drop. Keyboard users can Tab between the seven arrows and press Enter. Undo is available in bot and same-device games.

Gravity changes a threat

A disc falls to the lowest empty space in its column. A tempting gap higher up is not playable until the spaces beneath it are filled. Before choosing a column, check whether your disc creates a winning move for the opponent directly above it. Winning lines can run horizontally, vertically, or diagonally, so inspect both diagonal directions.

Build two ways to win

First block any immediate opponent win. Then look for a move that leaves two different winning drops for your next turn; a single reply may not block both. Central columns participate in more possible lines, although a specific threat takes priority over a general opening preference. In same-device play you can take turns on one screen. In online play, a finished game needs both players to request a rematch, and the starting player alternates.

Questions players ask

Can I put a disc into a gap halfway up a column?

No. Gravity places it in the lowest available square. Fill the spaces below before that gap becomes playable.

Can I undo an online move?

No. Undo is available against bots and on the same device, not in online matches.

Who starts a rematch?

The starting player alternates. In online play, both players must request a new game before it begins.

Keep playing and learning

Try Reversi for a different disc-placement puzzle, or Football for routes and forced replies.