Ways to Win at Four in a Row

There are exactly 69 ways to win at Four in a Row (Connect 4) on a standard 7 × 6 board. Each is a different straight line of four spaces.

Ways to win Connect 4: across (24 lines), up and down (21), diagonal rising (12) and diagonal falling (12)
24 + 21 + 12 + 12 = 69 winning lines.
DirectionHow manyHow it works
Across (horizontal)244 possible lines in each of the 6 rows
Up and down (vertical)213 possible lines in each of the 7 columns
Diagonal, rising to the right12Lines like a staircase going up
Diagonal, falling to the right12Lines like a staircase going down
Total69

Which wins are easiest to miss?

Diagonals. Most players spot rows and columns easily, but a diagonal threat can sit unnoticed for several moves. Always scan both diagonals after every move.

A diagonal threat that is easy to miss: the teal player has three on a diagonal and one space to complete it
Diagonal threats are the easiest to miss.

Which wins are easiest to block?

Vertical lines. A stack of three in one column is easy to see and easy to block by dropping a disc on top. That’s why strong players build horizontal and diagonal threats instead.

How the winner is decided

The game ends the moment a player completes any line of four. If both players could complete a line, whoever does it first wins. If the board fills with no line, it’s a draw.

Discs numbered in move order: the orange player completes four across on move 7, the quickest possible win
The game ends the moment four are lined up: here on move 7.

Next: learn how to set up winning lines in How to Win.