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Dots and Boxes
Dots and Boxes is a classic two-player paper-and-pencil game first described by the French mathematician Édouard Lucas in 1889, who called it la pipopipette. Players take turns drawing single lines on a grid of dots, and whoever closes the most boxes wins. It looks simple but hides surprisingly deep endgame theory.
Dots and Boxes Rules
Start with a rectangular grid of dots, commonly 5×5 or 6×6. On your turn you draw one horizontal or vertical line connecting two adjacent dots. Lines may not be diagonal, and you can only draw on edges that are still empty.
If the line you draw completes the fourth side of a 1×1 box, you write your initial inside it to claim that box and you must immediately take another turn. You keep drawing as long as each line you add closes another box.
Play continues until every edge on the grid has been drawn and all boxes are claimed. Count the boxes each player has initialed — the player with the most boxes wins. On a grid with an even number of boxes a draw is possible.
Dots and Boxes Strategy & Tips
Avoid drawing the third side
Adding the third side of a box hands your opponent a free box. Early on, play only edges that leave every box with two or fewer sides so you never set up an easy capture.
Think in chains
Late in the game the board splits into chains of connectable boxes. Whoever is forced to open the first chain usually loses, so count chains and aim to make your opponent move first.
Use the double-cross
When taking a long chain, leave the last two boxes by declining them — draw the line that gives your opponent two boxes but forces them to open the next chain for you. This sacrifice wins most close games.
Control chain parity
The first player wants the number of initial dots plus double-crosses to come out in their favor. On standard boards, aim for an odd number of long chains if you moved first, even if you moved second.
Frequently Asked Questions
Who goes first in Dots and Boxes?
Players decide by agreement or a coin flip. On many board sizes the first player has a theoretical advantage, but the double-cross technique can flip the result.
Do you always have to take a free box?
No. Taking every box is a beginner mistake. Skilled players use the double-cross, declining the last two boxes of a chain to force the opponent to open the next one.
What size grid is standard?
A grid of dots that makes a 5×5 or 6×6 box field is most common for casual play. Smaller 3×3 box grids are good for learning the chain rules.
Can Dots and Boxes end in a tie?
Yes, if the total number of boxes is even both players can finish with the same count. Use an odd total of boxes if you want to guarantee a winner.