Dominosa
Tile the number grid with the full set of dominoes, each pair used once.
How to play Dominosa
The grid is printed with numbers, and you must cover it completely using a full set of dominoes. That set contains every possible number pair once — for a grid of 0 to 3 that is ten dominoes, from double-zero up to double-three — and each pair may be used only a single time. Place a domino by clicking the line between two neighbouring cells, or by dragging from one cell onto the cell beside it; it snaps into a capsule that spans both. If a domino overlaps one you already placed, it simply replaces it, and any pair you have used twice is dimmed so you can spot the clash. The board is solved when every cell is covered and each number pair has been used exactly once. Every puzzle has a single solution, so it can always be reached by logic — beat your best time.
Dominosa leaderboard
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Dominosa — frequently asked questions
What is the goal in Dominosa?
You cover a grid of numbers with a complete set of dominoes. Each domino must sit on two adjacent cells whose numbers form its pair, and every unordered pair from the set is used exactly once, with the whole grid covered.
How do I place or remove a domino?
Click the border between two adjacent cells, or drag from one cell to a neighbour, to drop a domino there. Clicking the same domino again removes it, and placing one over existing cells replaces whatever was there, so it is easy to correct mistakes.
Why is one of my dominoes dimmed?
A dimmed domino means its number pair is already used elsewhere on the board. Since every pair may appear only once, you will need to move one of them before the puzzle can be solved.
Is every Dominosa board solvable?
Yes. Each board is generated and verified by a solver to have exactly one valid tiling, so a careful, logical approach will always crack it without guessing.
Is Dominosa free to play?
Yes — Dominosa is completely free on Inkplay, with no download, no sign-up, and no in-game purchases. Open the page and play instantly on desktop or mobile.
Can I play Dominosa unblocked?
Yes. Dominosa runs entirely in your browser with no download, install, or plugins, so it loads instantly and keeps working even on school or work networks where bigger game sites get blocked.
More black & white games
In the mood for more? Try 2048, Memory Match, Lights Out, 15 Puzzle — or browse all puzzle games and the full games list on Inkplay.