Sun & Moon puzzle: rules and strategy
Sun & Moon is a binary logic puzzle with suns and moons. Fill the grid so that every row and column holds as many suns as moons, never three of a kind in a line, and every = or × sign is respected.
Sun & Moon rules
- Every cell holds a sun or a moon.
- Each row and each column has the same number of suns and moons.
- No more than two of the same symbol may sit next to each other in a row or column.
- Cells joined by = are the same. Cells joined by × are opposite.
How to solve Sun & Moon: 5 tips
1. Break every pair
Two suns side by side must have a moon on each open end. The same goes for two moons.
2. Fill the gap
A sun, an empty cell and a sun in a line force a moon into the gap, because three suns would touch.
3. Count to finish a line
When a row already has all the suns it can hold, every empty cell left in it is a moon.
4. Follow the signs
An = or × sign links two cells. As soon as one is known, the other is too, and the result often starts a chain.
5. Use the edges
Signs and pairs near the edge of the board leave fewer options, so they are good places to start.
Play a new Sun & Moon puzzle every day
Pocket Logic gives you a fresh Sun & Moon board every day, the same for every player, with a streak, best times and smart hints. Hundreds of extra levels grow from warm-up to expert, and every board has exactly one solution. It works offline on Android and is free to play.
Sun & Moon puzzle FAQ
How do you play Sun & Moon?
Fill the grid with suns and moons so every row and column is balanced, no three of a kind touch in a line, and the = and × signs between cells are respected.
Is there a daily Sun & Moon puzzle app?
Yes. Pocket Logic for Android has a new Sun & Moon board every day, the same for every player, plus levels from easy to expert.
What do = and × mean in Sun & Moon?
= means the two cells hold the same symbol. × means they hold opposite symbols.