Binairo

SIMPLE TO START

How to play Binairo

1. Tap a square to cycle blank, black, white, then blank. Or select a square and use Black, White or Erase. Given circles have a small diamond and cannot change.
2. Fill half of every row and half of every column with black circles; the rest must be white. Never place three alike consecutively, horizontally or vertically.
3. No two complete rows can be identical, and no two complete columns can be identical. All three rules must hold to finish.
4. Check highlights rule conflicts, not whether an unfinished answer matches the solution. Undo reverses up to 200 edits, even after refreshing or completing a puzzle.
5. Switch puzzles to keep separate progress. Restart asks before clearing only the current puzzle.

Controls

Tap or click to cycle a square. Keyboard: arrows move, B/1 sets black, W/2 sets white, Space cycles, Delete/Backspace/0 erases, and Z undoes. Screen buttons provide the same input and checking actions.