Connect Four is a two-player game in which you race to line up four of your coloured discs in a row — horizontally, vertically or diagonally — on an upright grid before your opponent does. The rules take about a minute to learn, yet the game hides enough depth that mathematicians have formally “solved” it. This guide covers the full rules, setup, how to win, a practical winning strategy and the best-known variants, with every technical term explained the first time it appears.
Quick Facts
| Players | 2 |
|---|---|
| Recommended age | 6 and up |
| Playing time | About 1–5 minutes per game |
| Grid | 7 columns × 6 rows (42 slots) |
| Discs | 42 total — 21 per player (red and yellow) |
| Goal | Be first to line up four discs in a row — horizontal, vertical or diagonal |
| Type | Two-player abstract strategy game |
| First published | 1974, by Milton Bradley (now Hasbro) |
| Solved? | Yes — first player can force a win with perfect play from the centre column |
What is Connect Four?
Connect Four is an abstract strategy game for two players who take turns dropping discs into a vertical seven-column, six-row grid. “Abstract strategy” means the game has no theme, no hidden information and no dice — both players can see everything, and skill decides the outcome. In that sense it sits in the same family as chess, checkers and Go; if you enjoy it, the wider world of abstract strategy games is worth exploring.
Each player owns 21 discs of one colour — traditionally red or yellow. Because discs drop to the lowest open slot in a column, you never place a piece in mid-air: gravity decides where it lands. The goal is simple to state and surprisingly hard to force: be the first to connect four of your own discs in an unbroken line.
What you need to set up Connect Four
Setting up takes seconds. Here is everything the standard game includes and how to get ready:
- The grid: a vertical frame holding 7 columns and 6 rows — 42 slots in total.
- The discs: 42 discs, 21 in each of two colours (usually red and yellow).
- A flat surface: the frame stands upright, so set it on a table where both players can reach the top of every column.
To start, snap the grid into its stand (or slide the release bar closed so discs stay in place), split the discs by colour, and give each player one colour. Decide who goes first — a coin flip works, and as you will see below, going first is a genuine advantage.
How to play Connect Four step by step
Connect Four is played in alternating turns until someone makes a line of four or the board fills up. Here is the full sequence.
What is the objective?
The objective is to be the first player to get four of your own discs in a straight line. That line can run in any of three directions: horizontal (across a row), vertical (up a column) or diagonal (corner to corner). Any four-in-a-row of your colour wins instantly, wherever it forms on the grid.
How do you take a turn?
On your turn you drop one disc into the top of any column that is not already full. The disc falls to the lowest empty slot in that column. You may only ever add to the top; you cannot insert a disc into the middle of a stack or move a disc once it has landed. After your disc settles, play passes to your opponent. The first player places a disc, then the second player, and so on, back and forth.
How do you win?
You win the moment four of your discs form an unbroken straight line. For example, four red discs stacked in one column, four reds side by side along a row, or four reds climbing a diagonal all win for red. The four discs must be adjacent with no gaps and no other-coloured disc breaking the line. As soon as the winning disc lands, the game ends — there is no need to complete the turn or keep playing.
What happens if the board fills up?
If all 42 slots are filled and neither player has made four in a row, the game is a draw. Draws are uncommon between beginners but become more frequent as both players learn to block, because every disc you place to attack also gives your opponent information to defend.
Connect Four winning strategy
Connect Four rewards planning several moves ahead, the same habit that pays off across almost every game — see our broader board game strategy tips for the general version. These principles are listed roughly in order of importance.
Control the centre column
Play in or near the middle column early. The centre column is part of more potential four-in-a-rows than any other column — it can contribute to horizontal, vertical and both diagonal lines — so occupying it multiplies your winning chances and limits your opponent’s. If you move first, the single strongest opening is the centre column.
Create a double threat
Aim to set up two winning moves at once, a tactic often called a “double threat” or fork. If you threaten to complete four-in-a-row in two different spots on the same turn, your opponent can only block one of them, and you win with the other. Building toward two open-ended threes at the same time is the most reliable way to force a win.
Block your opponent
Watch for your opponent lining up three in a row with an open slot at either end, and block it before they can complete four. Defence is half the game: a single missed block usually ends the match. Train yourself to scan the whole board — rows, columns and both diagonal directions — after every one of your opponent’s moves.
Watch the diagonals
Diagonal threats are the easiest to miss because the eye tracks rows and columns more naturally. Many losses come from an opponent quietly building a diagonal while you focus on the obvious horizontal lines. Check both diagonal directions deliberately on every turn.
Think about odd and even threats
This is an advanced idea, so treat it as a bonus. Because players alternate turns, the row a threat sits on matters: counting from the bottom, rows 1, 3 and 5 are “odd” and rows 2, 4 and 6 are “even.” With perfect play, the first player tends to benefit from threats on odd rows and the second player from threats on even rows, because of who is forced to fill the slot beneath the winning square. You do not need this to beat a casual opponent, but it explains why expert games hinge on which player is forced to move into a losing position.
Is Connect Four a solved game?
Yes — Connect Four is a “solved” game, meaning the best possible result for perfect play by both sides is known. James Dow Allen published a solution on 1 October 1988, and Victor Allis arrived at one independently two weeks later, on 16 October 1988. The conclusion: with flawless play, the player who moves first can always win.
The catch is how they win. The first player wins only by opening in the centre column, after which perfect play forces a win by the 41st of the 42 possible discs. If the first player instead opens in a column immediately beside the centre, the game is a theoretical draw; opening on one of the outer columns actually hands the second player a forced win. For context, the 7×6 board has 4,531,985,219,092 legal positions — which is why the game feels deep even though the rules are trivial. None of this spoils casual play: against a human who is not following the solution move for move, both offence and defence still matter on every turn.
Connect Four variants
Several rule variations keep the basic grid but change how discs behave or what counts as a win. The table below summarises the best-known ones.
Variant Comparison
| Variant | Grid | Win condition | Key twist |
|---|---|---|---|
| Standard Connect Four | 7 × 6 | Four in a row | Drop discs from the top; gravity decides the slot |
| Pop Out | 7 × 6 | Four in a row | Each turn, drop a disc or remove one of your own from the bottom row, dropping the stack above it |
| Pop 10 | 7 × 6 plus two pre-filled side columns | Five in a row | Extra alternating-filled columns are added at each side |
| Five-in-a-Row | 6 × 9 (larger board) | Five in a row | A wider grid and a longer target line |
| Power Up | 7 × 6 | Four in a row | Each player has a few special discs (e.g. remove an opponent’s piece, take an extra turn), usable once each per game |
Pop Out adds a twist to the standard game: on your turn you may either drop a new disc or remove one of your own discs from the very bottom row, which slides every disc above it down by one slot. That single rule makes lines far harder to lock in and can swing a game late. Power Up editions hand each player a few specially marked discs — such as a piece that removes an opponent’s disc or lets you take an extra turn — each usable once per game.
Common mistakes to avoid
Most Connect Four losses come from a short list of avoidable errors. Watch for these:
- Only playing offence. Chasing your own line while ignoring your opponent’s is the number-one cause of defeat. Check their threats every turn.
- Missing diagonals. Diagonal four-in-a-rows are the most commonly overlooked. Scan both diagonal directions, not just rows and columns.
- Handing over the winning slot. Dropping a disc into a column can place your opponent’s winning square directly on top of it. Before you play, check what lands in the slot above your move.
- Clustering on one side. Piling discs into the outer columns early wastes the powerful centre and narrows your own options.
- Not thinking a move ahead. Because discs stack, a move that looks safe now can open a line for your opponent next turn.
Who is Connect Four for?
Connect Four suits almost everyone. The box is marketed for ages six and up, and the rules are simple enough for young children, yet the strategy stays interesting for adults — which is what makes it a reliable pick for mixed-age households. Games last only a few minutes, so it travels well and fills short gaps. As a head-to-head duel it is a natural fit for two-player board games, and as a quick, rules-light classic it is an easy entry point into the wider world of classic board game rules.
A short history of Connect Four
Connect Four was created by American game inventor Howard Wexler, with Ned Strongin also credited as a designer, and first sold under the Connect Four trademark by the Milton Bradley Company in February 1974. Early on it was treated almost as a vertical version of checkers and tucked away in the catalogue; sales climbed later in the decade once television advertising began. Hasbro, which acquired Milton Bradley in 1984, owns and publishes the game today. You may see stories tying the game to Captain James Cook and an older pastime called “The Captain’s Mistress,” but that origin is folklore rather than documented history. If the vertical-checkers comparison intrigues you, our guide to how to play checkers covers that classic in full.
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Frequently Asked Questions (FAQ)
How many pieces do you get in Connect Four?
Each player gets 21 discs of one colour, for 42 discs in total — exactly enough to fill the 7-column, 6-row grid if no one wins first.
Can Connect Four end in a tie?
Yes. If all 42 slots are filled and neither player has made four in a row, the game is a draw. Draws become more likely as both players get better at blocking.
Does the first player always win in Connect Four?
Only with perfect play. Connect Four is a solved game, and the first player can force a win — but only by opening in the centre column and playing flawlessly afterward. Against a normal opponent, going first is an advantage, not a guarantee.
What is the best first move in Connect Four?
Drop your first disc in the centre column. It belongs to more potential four-in-a-rows than any other column, giving you the most ways to build a line and the best position to block your opponent.
How long does a game of Connect Four take?
A single game usually lasts only a few minutes. Its speed and simple rules make it easy to play several rounds in a row or to use as a quick filler between longer games.
