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Puzzle Dominosa

puzzle-dominosa.com

Reconstruct which domino sits where, using every tile in the set exactly once.

Browse topics topic Free access
Play on puzzle-dominosa.com
No player ratings yet

Here’s what we found when we checked

Last checked 14 Aug 2026 · re-checked every Monday
Still live
Yes
Responded on the last sweep.
Truly daily
Endless
Not a daily-reset puzzle.
Signup
None detected
We found no login blocking play. This check catches redirects and blocking dialogs; a plain login landing page can slip past it.
Ad load
A few
Present but nothing blocks play.
On a phone
Works well
No horizontal scroll, tappable targets.
Real time
Not checked yet
Every answer above is measured — not copied from the game’s own description. How we measure →

Against the other matching puzzles we have measured

Every number here comes from opening the games ourselves. We have not finished them, so there is no strategy guide.

Overview

What Puzzle Dominosa is

Dominosa is a logic puzzle with simple rules and challenging solutions. You are given a grid of numbers, and your job is to find the locations of all dominoes on that grid. Each domino is a pair of numbers, and every possible pair appears exactly once. The game is free to play online in your browser, with no download required. You can choose from a wide range of grid sizes, from a small 3x3 board up to a large 20x20 one. There are also special daily, weekly, and monthly puzzles. The interface gives you clear controls: left-click to connect two numbers as a domino, right-click to place a border. Optional features like a timer, highlighting, and night mode help you tailor the experience.

Getting started

How to play

The grid contains numbers, and your task is to reconstruct where each domino lies. A domino is a pair of two numbers. You must place every possible pair exactly once, covering the whole grid. Left-click between two adjacent numbers to connect them into a domino. Right-click to place a border, which separates numbers that you believe cannot be connected as a domino. Use these two actions to mark connections and exclusions. As you work, the game tracks your progress. You can submit your solution when you think it is complete, and the game will check it for you.

Practical help

Tips

  1. Use right-clicks to mark borders between numbers that cannot be part of the same domino; this narrows down possible connections.
  2. Remember that each number pair appears exactly once, so if you have already placed a certain pair, look for other pairs in the rest of the grid.
  3. Start with the smallest grid sizes (3x3 or 4x4) to grasp the rules before tackling larger puzzles.
  4. If you are not in a hurry, switch on the non-competitive timer to track your time without pressure.
  5. Use the 'Highlight wrong tiles' option to see mistakes as you play, which can save time on large grids.
  6. When you are stuck, try the 'Show checkpoints' feature to see your progress and reason from known placements.
Quick answers

Common questions

How do I mark a domino or a separator?

Left-click between two adjacent numbers to connect them as a domino. Right-click to place a border between numbers you want to separate.

What grid sizes are offered?

The grid sizes available are 3x3, 4x4, 5x5, 6x6, 7x7, 8x8, 9x9, 15x15, and 20x20. There are also daily, weekly, and monthly special puzzles.

Can I print a puzzle to solve on paper?

Yes. The site states you can print a copy of the puzzle, even if JavaScript is disabled.

What is the main goal of Dominosa?

The object is to find the location of all dominoes on the grid. Each domino is a pair of numbers, and each pair appears exactly once.

What gameplay options are available?

Options include a timer (with a non-competitive personal mode), auto-submit, checkpoints, night mode, highlighting the last change, magnifying the current tile while drawing, left-handed mode, and highlighting wrong tiles or using blue for errors.