Sundown
Every puzzle has one logical solution.
A grid puzzle where every cell holds a sun or a moon, and every board has exactly one solution you can reason your way to. Pick a quick 6×6 or settle into a 12×12 for the evening.
See it in action
A quick look at Sundown
Features
Hints, grid sizes, and themes
Hints that teach
The three-stage hint system points to the right region, names the technique, then shows the forced cell, so the reasoning sticks with you for next time.
Sixteen ways to play
6×6, 8×8, 10×10, and 12×12 grids across Easy, Medium, Hard, and Expert. Every puzzle is generated on your device, so you never run out.
Eight board themes
Four free themes plus four premium palettes: Aurora, Solstice, Sakura, and Eclipse.
The rules
The four rules
- Balance every lineEach row and column must contain an equal number of suns and moons.
- No three in a rowThree identical symbols may never sit together in a row or column.
- Read the edgesMarks between adjacent cells tell you whether those two must match or differ.
- Distinct completed linesNo two completed rows may be identical, and no two completed columns may be identical.
Start with an easy 6×6
Free to download and play, with no account. It works offline after the first launch.
More from the studio
Sixer
Wax KeyBefore your first board
Find a reason for the next symbol
On a 6×6 board, each row and column needs three suns and three moons. Never place three matching symbols consecutively or repeat a completed row or column. A match mark joins equal symbols; a differ mark joins opposites.
Try a small pattern
Sun, blank, sun must become sun, moon, sun. The middle cannot be another sun: that would make three. The same pattern works down a column.
Do not fill a quota at random
A row needing two more moons does not tell you which two squares take them. Look for a triple, an edge mark, or a completed symbol count before tapping.
One puzzle, every decision explained follows a real board from eleven starting clues to its last square.