Binairo Unlimited Binary Puzzles
0:00
Setting up the board…
0/0
How to play
- Fill every cell with yin (dark) or yang (light).
- Each row and column has the same number of each.
- No three in a row of the same symbol, across or down.
- Cells joined by = match. Cells joined by × are opposites.
Tap once for yang, twice for yin, again to clear. Shaded cells are fixed. Every board has one solution.
Unlimited binary puzzles
Endless mode deals a fresh Binairo (Takuzu) board whenever you want one, with no daily limit. Pick a level and play as many binary puzzles as you like. Each board still has exactly one solution that logic alone will find.
Difficulty levels
- Easy: 6×6 boards solved with pairs, gaps, full lines and links.
- Medium: 6×6 boards where you compare the ways a row or column could still be finished.
- Hard: sparse 6×6 boards that need "what if" reasoning, where one stone would break a rule.
- Expert: 8×8 boards with the hardest deductions.
Solve a board to send it to a friend: the link opens the same board and shows your time to beat. Your solved count and best time per level stay on your device. For the board everyone plays today, and your streak, play today's Binairo.