Play Binairo Online — Free
Fill the grid with 0s and 1s so no three consecutive cells in any row or column are the same, each row and column has equal counts, and no two rows or columns are identical.
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About Binairo
Binairo (also called Takuzu or Binary Puzzle) is a binary logic puzzle where you fill a grid with 0s and 1s under three rules: no three consecutive identical symbols in any row or column, equal numbers of 0s and 1s in every row and column, and no two rows or columns may be identical.
These three rules interact powerfully. Spotting “1 _ 1” forces the middle cell to be 0. Counting the existing 0s in a row may force all remaining cells to be 1. Checking for near-duplicate rows resolves ambiguous cells that no individual rule would catch.
Binairo is excellent for beginners to logic puzzles because the constraints are immediately understandable — there are only two symbols — yet the grid-level reasoning required for harder puzzles is genuinely challenging. It also plays quickly: a 10×10 grid typically takes 5–15 minutes.
The balance rule is the most powerful starting point. Once half a row is filled with one symbol, all remaining cells must be the other. This cascade of forced placements often unlocks a chain of deductions that fills the grid rapidly.
Frequently asked questions
What is Binairo?
Binairo (Takuzu) is a binary logic puzzle. Fill each cell with 0 or 1. No three consecutive cells in a row or column can be the same digit, each row and column must have equal numbers of 0s and 1s, and no two rows or columns can be identical.