⚫ Binairo
Fill the grid with two symbols — no three in a row, balanced lines.
SIZE
TIME 0:00BEST —
How to play Binairo
- Pick a grid size and press Start. Dotted cells are fixed clues.
- Tap a cell to cycle it: empty, first colour, second colour.
- No three cells of the same colour may sit next to each other in a row or column.
- Each row and column must hold equal numbers of both colours. Fill the grid correctly to win.
Controls
| Input | Action |
|---|---|
| Tap a cell | Cycle empty / colour one / colour two |
| Ctrl+F | Enter or leave full screen |
Tips & strategy
- Two of a colour with a wall or edge forces the opposite colour next to it.
- If a line already has half its cells one colour, every remaining cell is the other.
- A gap between two of the same colour must be filled by the other, or you'd make three.
- Fixed clues never change — build outward from the cells they constrain.
Frequently asked questions
What is Binairo?
Binairo, or Takuzu, is a logic puzzle played with two symbols under two rules: never three in a row, and each line evenly split.
Is there always a solution?
Yes. Each puzzle is carved from a complete valid grid, so a correct filling always exists.
How is my score tracked?
Your record is the fastest solve time, saved per grid size.