Sun & Moon(Tango) — Free Logic Puzzle Game
Fill the grid with suns & moons — balance every row and column, and never three of the same in a line.
What is Sun & Moon (Tango)?
Sun & Moon (also known as Tango) is a binary logic puzzle. Fill a 6×6 grid with suns and moons so that each row and column contains exactly three of each. No three consecutive identical symbols are allowed, and constraint markers between cells add extra rules to follow.
How to Play Sun & Moon
- Fill each cell with a sun or moon.
- Each row and column must have exactly 3 suns and 3 moons.
- No three consecutive identical symbols in any row or column.
- "=" between cells means they must match; "x" means they must differ.
- Click a cell to cycle: empty → sun → moon → empty.
Two ways to play
★ Daily Challenge — one shared 6×6 puzzle each day; solve it to build your day streak. ∞ Unlimited Levels — an endless ladder that grows from gentle 6×6 grids to tough 8×8 ones.
Tips & Strategy
- Start with rows or columns that already have symbols filled in — they have fewer possibilities.
- Count suns and moons in each row and column as you go. You need exactly 3 of each.
- Watch for the constraint markers: "=" means same symbol, "x" means different.
- If three cells in a row would be the same symbol, that’s invalid. Use this to eliminate options.
Frequently asked questions
How do you play Sun & Moon?
Tap a cell to place a sun or a moon. Every row and column must end with three suns and three moons, you can never have three of the same symbol in a line, and = or × markers between cells force those cells to match or differ. Every puzzle has exactly one solution.
Is Sun & Moon free to play?
Yes. Sun & Moon is completely free to play in any web browser, with no download and no sign-up, and there are native iOS and Android apps too.
What is the daily challenge?
The daily challenge is one shared 6×6 puzzle that is the same for every player each day. Solving it builds your day streak and puts you on the global leaderboard.
Is Sun & Moon the same as Binairo or Takuzu?
They share the same binary logic: balance two symbols and never place three identical ones in a line. Sun & Moon (Tango) adds = and × clue markers between cells and uses suns and moons instead of ones and zeros.
What languages is Sun & Moon available in?
Sun & Moon is available in 16 languages: English, Spanish, French, German, Portuguese, Italian, Dutch, Turkish, Arabic, Russian, Hindi, Indonesian, Japanese, Korean, Simplified Chinese and Traditional Chinese, with full right-to-left support for Arabic.