STRATEGY

CONNECT FOUR: THE CENTRE COLUMN STRATEGY

Drop coloured discs into a 7-column × 6-row grid. First to get 4 of their colour in a row (any direction) wins.

DIFFICULTYBEGINNER

PLAYERS2

PLAY TIME5–15 min

AGE6+

CONNECT FOUR ABSTRACT STRATEGY

STEP 1

SETUP

1Stand the grid upright between players.
2Each player takes 21 discs of one colour (red or yellow).
3Decide who goes first (winner of a coin toss or previous game loser).

STEP 2

HOW TO PLAY

EACH TURN

On your turn, drop ONE disc into any column that isn't full. The disc falls to the lowest empty row in that column (gravity). Then it's your opponent's turn.

WINNING LINE

Get 4 of your discs in a row — horizontally, vertically, or diagonally. The 4th disc that completes the line wins immediately.

FORKS (DOUBLE THREATS)

A fork is a position where you threaten to win in two different columns next turn. Your opponent can block only one. Setting up forks is the entire skill ceiling of Connect Four.

ODD vs EVEN ROWS

If you go FIRST, threats on ODD rows (1, 3, 5 — bottom counts as 1) favour you because the parity of move counts means you'll fill them. If you go SECOND, focus on EVEN row threats. This is the hidden symmetry of the solved game.

★ WIN CONDITION

First to 4 in a row wins. If the entire grid fills with no winner, it's a draw (rare with mismatched skill).

STEP 3

QUICK TIPS

▸Always open with the CENTRE column. Computer-solved: first player wins with perfect play.
▸After the centre opening, focus on building 'odd threats' that occupy odd-numbered rows.
▸Watch for opponent forks 2 moves ahead. Block early, even at the cost of your own setup.
▸Avoid dropping discs that immediately enable your opponent's 4-in-a-row above.
▸Adults teaching kids: deliberately don't take the centre — game becomes fairer.
▸For more depth: Gomoku (5-in-a-row, no gravity, 15×15 board) is the natural upgrade.

DEEP DIVE

STRATEGY NOTES

Connect Four was mathematically solved in 1988 by James Allen and Victor Allis (independently the same year). The conclusion: with perfect play from both sides, the first player always wins, and the winning strategy starts by dropping the opening disc in the centre column.

The centre-column opening participates in the most possible four-in-a-row combinations — it intersects every horizontal, vertical, and both diagonals. New players who learn the centre-first rule beat opponents who don't, almost every time.

The double-threat (or "fork") is where Connect Four becomes briefly interesting between two intermediate players. Setting up a position where you can win in two different columns next turn — forcing your opponent to block only one — is the same tactical concept as the chess fork.

The reason Connect Four still has value is that kids learn pattern recognition from it. A 7-year-old who can spot a horizontal three-in-a-row and block it has just internalised threat evaluation, which transfers to Chess, Othello, and Gomoku.

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