Play Connect Four with a friend

ReadyYou
RedMoves first
BlueMoves second
RedMoves first
RedMoves first
Black
XMoves first
OMoves second
YellowMoves second
BlackMoves second
White
BlackMoves first
WhiteMoves second
WhiteOpening roll decides
BlackOpening roll decides
BlackMoves first2
WhiteMoves second2
RedMoves first
BlueMoves second
SouthMoves first
NorthMoves second

Enemy waters

Your fleet

A little nudge

Connect Four (Four in a Row)

Connect Four (Connect 4, or Four in a Row) is played with red and yellow discs on a 7-column, 6-row board. Share an invite link to play online with a friend, take turns on one device, or choose the computer at Beginner or Advanced level. Free, with no sign-up.

How do you win?

Red moves first. Choose a column and your disc falls to its lowest empty space. Full columns cannot be played. Connect four or more discs horizontally, vertically or diagonally to win. A full board without a winner is a draw.

Can I undo or play another round?

Online Undo needs your friend’s approval. On one device it reverses one move; against the computer it reverses your move and the reply. Finished games cannot be undone.

Choose “Play again” after a result. Online, both players must accept. The score carries over and sides switch by default; tap the next-side line to change them.

How to play

  1. Share an invite link with your friend, play together on this device, or choose the computer.
  2. Red moves first. Take turns choosing a column; your disc falls to its lowest empty space. Full columns cannot be played.
  3. Four or more discs in a horizontal, vertical or diagonal row wins. A full board without a winner is a draw.
  4. On a phone, tap a column to preview the disc, then tap the same column again to drop it. With a keyboard, Tab to a column, use arrow keys to choose, and press Enter or Space.
  5. Undo and Resign sit below the board. Online Undo needs your friend’s approval. On one device it reverses one move; against the computer it reverses your move and the reply. Finished games cannot be undone.
  6. Choose “Play again” after a result. Online, both players must accept. Sides switch by default; the score carries over.
  7. Progress is saved in this browser. Return here to try to resume after a refresh or disconnect; online recovery needs both players to reconnect. Changing devices or clearing browser data can prevent recovery.

Returning to a game

Progress is saved in this browser. For an online game, use the room link in the same browser; both players need to reconnect. Changing browsers, clearing browser data or an expired room can prevent a return. There is no cloud backup of your game.