Dots and Boxes
A pen-and-paper territory game of claiming squares one careful line at a time.
- Players2 players
- Play time10 to 20 minutes
- DifficultyBeginner friendly
- OriginFrance, 19th century, described in print as early as 1889 under the name 'la pipopipette'
- You'll needPaper and two pens or pencils in different colors.
Overview
Dots and boxes is a simple pen-and-paper game built on a grid of dots, where two players take turns drawing single lines between neighboring dots, trying to be the one who completes the fourth side of a small square. Despite needing nothing more than paper and a pencil, the game hides real strategic depth in its endgame, where an experienced player can force long chains of boxes to fall to them in a row.
The game was described in French sources as early as 1889 under the name "la pipopipette," and it has remained a popular way to pass time with almost no equipment, especially among students filling the margins of a notebook. Its accessible rules mask a genuinely studied strategic layer, particularly around a technique called the "double-cross strategy" used by strong players in the closing stages of a game.
What You Need
You need only a sheet of paper with a grid of evenly spaced dots (a 5-by-5 or 6-by-6 grid of dots is common for a casual game) and two pens or pencils, ideally in different colors so each player's boxes can be marked clearly.
Setup
Draw a grid of dots in even rows and columns; the number of dots determines the number of possible boxes, since a grid of dots that is m by n creates (m-1) times (n-1) boxes. No lines are drawn between the dots at the start — the entire grid begins empty except for the dots themselves.
How to Play
On each turn, a player draws a single straight line connecting two dots that are horizontally or vertically adjacent — no diagonals are allowed. If a player's line completes the fourth and final side of a box, they write their initial inside that box to claim it, and crucially, they immediately take another turn. This means a single turn can sometimes chain into several extra turns if one line completes multiple boxes or sets up an immediate follow-up. If a drawn line does not complete a box, the turn simply passes to the other player.
How to Win
Play continues until every possible line on the grid has been drawn and every box has been claimed. The player who has claimed the most boxes when the grid is completely full wins the game.
Tips
- Avoid drawing the third side of any box unless you're forced to, since it hands your opponent a free box.
- Learn the 'double-cross strategy': sacrifice the last two boxes of a long chain to force your opponent into opening the next chain for you.
- Count the number of long chains on the board as the endgame approaches; whoever controls the count of chains often controls the game.
- Try to create an odd or even number of long chains depending on whether you want to move first or last into the final chain.
- Play defensively in the middle game to delay creating any three-sided boxes for as long as possible.
Common Mistakes
- Giving away an easy box early without realizing a chain of boxes will follow behind it.
- Not taking the free extra turn after completing a box.
- Ignoring chain-counting entirely and playing only one move at a time.
- Taking every single box in a long chain instead of sacrificing the last two to control the next chain.
Variations
Larger grids extend the game considerably and reward more advanced chain strategy. A three- or four-player version is possible on a larger grid, though the chain-control strategy becomes harder to apply cleanly with more than two players. Some players score boxes by area instead of count on grids with mixed shapes rather than pure squares.
Frequently Asked Questions
It's a core rule of the game: any time a move completes one or more boxes, that same player draws another line immediately, which is what allows one skilled move to snowball into taking an entire chain.
It's an advanced endgame technique where, instead of greedily taking every box in a long chain, a player leaves the last two boxes for their opponent, forcing the opponent to be the one who has to open the next chain.
Yes, significantly — larger grids create more and longer chains, which makes chain-counting and the double-cross strategy far more important than in a small, quick game.