Binary: play Takuzu online
Takuzu (binairo): fill the grid with 0s and 1s while following three simple rules. An addictive logic puzzle.
Play BinaryFree, zero ads, no sign-up, on mobile and desktop.
How to play
Fill the grid with 0s and 1s: as many of each in every row and column, never three alike in a row, and no two identical lines.
Example
Two 0s and two 1s in every row and column, never three of a kind in a row, and no two rows or columns alike.
A full Easy grid
A real Easy grid (6 × 6), as you play it, and its solution. Same rule as the example above, only bigger.
Tips to get better
- Two identical digits side by side: the cells around them take the other digit.
- Two identical digits with a gap between them: the middle cell takes the other digit.
- Count the 0s and 1s in a line: once one reaches half, the rest of the line takes the other.
- Near the end, compare almost-full lines: two identical lines are not allowed.
What this game trains
- Logical reasoning: deduce the solution from the rules, without guessing.
Levels
Easy · Hard · Expert · Hardcore — each level has its own leaderboard.
Challenge your friends
At the end of a game, send your score as a link: your friend plays exactly the same puzzle and you compare your times. There is also a daily challenge and tournaments.