3 rules · unique solution

☀️ Binairo — Sun & Moon

Fill the grid with suns and moons: never three alike in a row, equal numbers in every row and column, and no two identical rows or columns. Thirty seconds to learn, hard to put down.

Time 0:00

Tap a cell to cycle empty → ☀ → 🌙. Given cells are framed and locked. Rule violations glow red the moment they appear. Every puzzle is generated with exactly one solution.