Hype Dominosa
A classic Dominosa logic puzzle. Carve the grid of numbers into dominoes so that every possible pair of numbers lands on exactly one domino. Pure logic, free hints, zero risk.
Dominosa: how to play, rules & tips
Play Dominosa free online. Split a grid of numbers into dominoes so that every possible pair of numbers appears on exactly one domino. One solution per board and a free hint.
How to play Dominosa
The board is a grid of numbers. Hidden in it is a full set of dominoes: every pair of numbers, including doubles like 2-2, appears exactly once.
Your job is to cover the whole grid with 1×2 dominoes so no pair is used twice. Tap two neighboring squares to lay a domino. Tap a covered square to pick its domino up again.
Hint places a correct domino, and Clear empties the board.
Board sizes and difficulty
There are 10 Dominosa puzzles. The 4 easy boards use numbers 0 to 3 on a 4×5 grid (10 dominoes). The 3 medium boards use 0 to 4 on a 5×6 grid (15 dominoes). The 3 hard boards use 0 to 5 on a 6×7 grid (21 dominoes).
Every board was checked by a solver to have exactly one solution, so you never have to guess.
Dominosa tips
- Hunt for pairs that appear only once. If 1-4 shows up in just one spot as neighbors, that spot must be the 1-4 domino.
- After you place a domino, every other place that pair appears is ruled out. That often creates new single-option pairs.
- Look at corners and edges. A square with only one free neighbor has to pair with it.
- Watch for stranded squares. If a placement would leave a square with no free neighbor, it is wrong.
- Keep a mental checklist of the pairs you have used. Near the end, the missing pairs tell you where the last dominoes go.
Frequently asked questions
Is Dominosa free?
Yes. HypeGameRoom is free: no sign-up, no download and nothing to buy to play. Arcade games reward Neons, a play-only currency that can never be cashed out.
Are doubles included in Dominosa?
Yes. Pairs like 0-0 and 3-3 are part of the set and each appears exactly once.
Does the order of a domino matter?
No. A 2-5 domino and a 5-2 domino are the same pair, so you can only have one of them.
What if I place a domino wrong?
Tap it to remove it, or press Clear to start over. Mistakes never cost you anything.