Dots and Boxes tournament for your class
Teams
Add 2–16 teams or players and tap the icon to pick a mascot. Odd numbers get a free pass (bye) in round one.
This Dots and Boxes tournament maker builds a knockout bracket for 2 to 16 teams or players. Each match is a quick game on a 3×3, 4×4 or 5×5 board, winners move on automatically, and the champion gets a printable certificate. No sign-up, nothing to install.
Enter teams and pick mascots
Add between 2 and 16 names. Shuffle the draw for fairness, or keep your own order to seed the bracket.
Play each match on the board
Matches run one at a time in Pass & Play, and winners move forward on the bracket by themselves.
Print the bracket and the certificate
Pin the bracket on the wall as you go, then print a certificate for the champion.
Running a Dots and Boxes tournament in one lesson
I've run these on a whiteboard with a marker and a lot of rubbing out. This page does the bookkeeping instead. Type the team names, choose a board, and the bracket appears with every first-round match ready to play. Eight teams on 3×3 boards finish in roughly twenty minutes, about the length of a long indoor recess.
Byes are handled for you. When the number of teams doesn't fill the bracket, some get a free pass into round two, spread out so no first-round match is two empty slots.
Dots and Boxes tournament rules that keep it fair
Agree on three things before the first match. The board size stays the same for everyone. Decide who starts each game, by coin toss or by letting the lower seed open. And know the tie rule: on a 4×4 board the 16 boxes can split evenly, so a tied match is simply replayed. On 3×3 and 5×5 the box count is odd, so every game produces a winner.
Brackets, certificates and the wall chart
Print the bracket as soon as the draw is made and pin it up, then reprint after each round so the class can watch names move along. When the final ends, the champion screen offers a certificate with the winning team's name. The tournament is stored in your browser, so a page refresh won't lose it, and nothing about the players is sent anywhere.
Tournaments that work
- Indoor recess, eight teams
Use 3×3 boards and you'll have a champion in about twenty minutes.
- End-of-unit celebration
Let the class name their teams after the topic you just finished.
- Math club playoff
Step up to 5×5, where long chains settle most matches.
- Family game night
Four players, a 4×4 board and a certificate for the fridge.
- An awkward number of players
Byes are added automatically and spread across the first round.
- Two classes, one hall
Up to sixteen teams fit in a single bracket on the projector.
Tournament questions
How do you run a Dots and Boxes tournament in class?
Enter the team names here, pick a board size and press start. The page builds a knockout bracket and lines up each match in order. Play the games on the board, and the winners move forward until there's a champion.
How are players paired?
With Shuffle draw on, teams are placed in the bracket at random, which is the fairest option for a mixed class. Turn it off to keep the order you typed, which lets you seed stronger teams apart. Either way it's single elimination: lose once and you're out.
What happens with an odd number of players?
Some teams get a bye, a free pass into the second round. The page adds them automatically and spreads them through the draw. Any number from 2 to 16 works.
What board size works best for tournament games?
3×3 is the classroom favorite because matches are quick and can't be tied. 4×4 gives a little more room for strategy but can end level. Choose 5×5 for older students or a club, where chains really come into play.
How long does a class tournament take?
On 3×3 boards a match takes two or three minutes, so eight teams finish in about twenty. Sixteen teams need roughly twice that. Bigger boards add a few minutes to every match.
What happens if a match ends in a tie?
Ties can only happen on the 4×4 board, where 16 boxes can split evenly. The match screen asks you to replay the game to decide the winner. Short on time? Stick to 3×3 or 5×5, which always produce a winner.