Duotone

Fill the grid with two colours by two simple rules: never three of the same colour in a row or column, and every row and column ends up with an equal split of both colours. A few cells are given — deduce the rest. Grids grow as you climb.

• Logic
• Medium
• about 4 min

How to play

1. Tap a cell to cycle it: empty → blue → gold → empty. Outlined cells are fixed clues.
2. Rule 1: never three of the same colour next to each other in a row or column.
3. Rule 2: each row and column must have equal blue and gold. Fill the grid correctly to solve.

Play free in your browser — the first levels need no account.

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