Sun & Moon
Balance the sky.
Sun & Moon
Fill the grid with suns and moons: equal numbers in every row and column, never three alike in a row, and = and × signs to obey — 60 levels.
About the Game
Sun & Moon is a binary logic puzzle from ZOQSY Brain Games. Fill every cell with a sun or a moon. Each row and each column must hold the same number of suns and moons, and no more than two identical symbols may sit next to each other across or down. From level 21, signs between cells add more logic: = means the two cells hold the same symbol, × means they are different. Tap a cell to cycle sun, moon and empty, or pick a symbol to paint with. With Auto-check on, a broken rule turns red and the game explains which rule it is. The 60 levels grow from 4×4 boards to 8×8 skies where you need to think a step ahead. Every puzzle was checked by a solver to have exactly one solution, and every one can be solved by logic. Hints show the next forced cell and why. Undo, redo, clear, stars, best times and saved progress in your browser.
How to Play
Fill every cell with a sun or a moon. Every row and column must contain equally many suns and moons. Never place three identical symbols in a row, horizontally or vertically. Cells joined by = hold the same symbol, cells joined by × hold different symbols. Tap a cell to cycle through sun, moon and empty. The level is solved when the board is full and every rule holds.
Controls
- Tap or click a cellCycle sun → moon → empty
- Sun / Moon / Clear buttonsPaint one symbol
- Arrow keysMove · S or 1 — Sun · M or 2 — Moon · Space — Cycle · Delete — Clear
- Ctrl+Z / Ctrl+YUndo / Redo · H — Hint
Features
- 60 levels from 4×4 to 8×8
- Every level checked by a solver to have exactly one solution, solvable by logic
- = and × relationship signs from level 21
- Auto-check that highlights and explains broken rules
- Hints that reveal the next forced cell and the reason
- Stars, best times and saved progress in your browser
Gameplay Tips
- Two identical symbols side by side: the cells on both ends must be the other symbol.
- A gap between two identical symbols must be the other symbol.
- When a row has its full share of suns, the rest of that row is moons.
- An = sign next to a pair works like a pair: think about what would make three in a row.
FAQ
What are the rules of Sun & Moon?
Every row and column holds the same number of suns and moons, no more than two identical symbols may be adjacent in a line, = joins cells with the same symbol and × joins cells with different symbols.
Can I play without automatic checking?
Yes. Turn Auto-check off and rule violations are only shown once the board is full.
Does every level have a single solution?
Yes. Every level was checked by a solver before release and can be solved with logic, without guessing.
Is my progress saved?
Yes, in your browser on this device: solved levels, stars, best times and an unfinished board you can resume.
