# Binairo

Fill every cell with a 0 or a 1 so the whole grid obeys the three rules.

- Category: Puzzle
- Features: Leaderboard, Saved progress
- Tags: puzzle, logic, grid, binary, takuzu, brain, zero, one, balance

## How to play

### Goal

Fill every cell with a 0 or a 1 so the whole grid obeys the three rules. Each puzzle has exactly one solution — you never have to guess.

### Rules

• No more than two of the same number in a row, across or down
• Each row and each column holds an equal number of 0s and 1s
• No two rows are identical, and no two columns are identical

### How to Play

• Tap a cell to cycle it: empty → 0 → 1 → empty
• Given clues are fixed and cannot be changed
• A whole row or column lights up green once it is complete and breaks no rule — that is your only correctness check, so you can't guess your way to the end
• Use Erase to clear the selected cell, and Hint to reveal one
• Keyboard: arrows or WASD move the cursor, 0 and 1 set a value, Enter or Space cycles, Backspace clears, Z undoes

### Tips

• Look where three of a kind threatens — the third cell is forced to the other value
• Once a line has all its 0s (or all its 1s), every remaining cell must be the other number
• A row that is almost done can never end up matching a row already completed — use that to break ties

### Difficulty

The board grows with difficulty: 6×6, 8×8, 10×10 and 12×12. A bigger board means longer chains of reasoning, never guesswork.

Play Binairo in the free Game Nest app for iPhone, iPad, and Android.