Just two digits, three rules. Fill the board with 0 and 1, keeping every row and column balanced and different. Choose 6×6 or 8×8. Our original puzzles are independently checked for one solution and for solving with line deductions alone.
How to play Takuzu
- 1Every row and column needs the same number of zeros and ones: three of each in 6×6, four in 8×8.
- 2Never place three identical digits next to each other horizontally or vertically. Diagonals do not count.
- 3No two completed rows may be identical; no two completed columns may be identical. A row may match a column.
- 4Fixed clues stay locked. Tap a cell with a chosen digit, use Undo to retry, and complete every empty cell. Highlighted errors follow the rules, not a hidden answer.
How to play Takuzu · FAQ
Do I need to guess?
No. Every published puzzle is checked for exactly one solution, and separately solved by a line-based logic checker without branching or looking up the answer.
Does my game save?
Moves and undo history save in your browser and sync with your account when signed in. Shared links contain only the puzzle, never account details or moves.