How to play Binary Puzzles (Suns & Moons)

Balance every row and column

Suns & Moons is a binary puzzle: every cell holds a sun or a moon.

The rules

As many suns as moons in every row and column.
No three alike in a row.
Between cells: = same, × different.
Tap once for a sun, twice for a moon, three times to clear. Grey tiles are fixed.
Every puzzle has exactly one solution, and you never have to guess.

An easy 6×6 Suns & Moons from the game, solved. The grey tiles were given at the start.

Two alike side by side force the third: the cells at both ends of the pair take the other symbol.
A gap between two alike, like sun, empty, sun, must be the other symbol.
Count as you go: once a row of six has three suns, the rest of it is moons.

For Android 7 or newer. Free, with ads, and no ad interrupts a puzzle.