Binairo

Fill the grid with nothing but 0s and 1s — keep every line balanced, ban any run of three, and make sure no two rows or columns ever match.

How to play

Binairo is a binary logic puzzle. Every cell holds either a 0 or a 1, and a handful of cells start filled as clues. Work out the rest by pure deduction — each finished grid has exactly one solution and needs no guessing.

• Each row and each column must contain an equal number of 0s and 1s.
• No three identical digits may sit in a row, across or down.
• No two rows may be identical, and no two columns may be identical. Conflicts glow red while you work.

Controls

• Desktop: click an empty cell to cycle blank → 0 → 1 → blank. Or use the arrow keys to move and press 0, 1, or Backspace to set and clear a cell.
• Phone & tablet: tap a cell to cycle through 0 and 1 — no keyboard needed. Reset and Hint buttons are always available.

Game modes

• Sizes — 6×6, 8×8 and 10×10 grids of increasing challenge.
• Daily — one shared puzzle each day.
• Practice — fresh random grids on demand.

Tips & strategy

• Spot pairs: two identical digits side by side force the opposite digit on both ends to avoid a triple.
• When a line already holds all of one digit, every remaining empty cell must be the other.
• Near the end, use the no-duplicate-lines rule to break ties between two almost-finished rows or columns.

About Binairo

Binairo is a binary-puzzle deduction game built on three simple balance-and-uniqueness rules, in the spirit of sudoku-style logic but with only two symbols. This is an original, free browser version with daily and practice puzzles, playable instantly with no download or sign-up.

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