Logic · Binary grid
Sun & Moon
Half light, half dark, never three in a row — and follow the = and × clues.
About Sun & Moon
Sun & Moon is a binary logic puzzle. Fill every cell with a sun or a moon so that each row and column has the same number of each, and never three of the same in a row. Extra = and × signs between cells tell you whether neighbors are equal or opposite.
Play a new daily puzzle every day, or pick Easy, Medium or Hard in practice mode for unlimited puzzles.
How to play
- Fill every cell with light or dark.
- Each row and column has equal numbers of light and dark.
- No row or column may have three in a row of the same kind.
- = means the two neighbors are the same; × means they are opposite.
Shaded cells are given and cannot be changed.
Tap a cell to cycle: light → dark → empty.
Tips & strategies
- Two identical symbols in a row force the cells on both sides to be the opposite.
- A gap between two identical symbols must be the opposite symbol.
- When a row has its quota of one symbol, the rest must be the other.
FAQ
How do you play Sun & Moon?
Fill every cell with light or dark. Each row and column has equal numbers of light and dark. No row or column may have three in a row of the same kind. = means the two neighbors are the same; × means they are opposite.
Is there a new Sun & Moon puzzle every day?
Yes. A new daily puzzle arrives at midnight (your local time) and everyone gets the same one. Missed days can be played from the archive.
Do I need to sign up or install anything?
No. Daily Brain runs in your browser. You can add it to your home screen and it keeps working offline after the first visit. Progress is stored only on your device.
Are there difficulty levels and hints?
Practice mode offers Easy, Medium and Hard with unlimited new puzzles. Hints are available when you get stuck and are recorded in your result.