Sun & Moon (Tango) — Free Logic Puzzle Game
Sun & Moon, also known as Tango, is a free binary logic puzzle you play in your browser or on iOS and
Android. Fill a 6×6 grid with suns and moons so that each row and column contains exactly three of each, with no
three identical symbols in a line. It is related to Binairo and Takuzu, with extra = and × clue markers between
cells. Available in English, Spanish, French, Turkish and Arabic.
How to play Sun & Moon
- Tap a cell to cycle it through empty, sun and moon.
- Each row and each column must contain exactly three suns and three moons.
- You can never have three of the same symbol next to each other in a line.
- A = sign between two cells means they must match; a × sign means they must differ.
- Every puzzle has exactly one unique solution you can reach with pure logic.
Features
- A free daily challenge — one shared puzzle for everyone, with day streaks.
- Unlimited levels that scale from gentle 6×6 grids to tough 8×8 boards.
- A global leaderboard powered by a live online backend.
- Hints that explain the exact reason a cell must be a sun or a moon.
- Five languages with full right-to-left support for Arabic.
Frequently asked questions
Is Sun & Moon free?
Yes — it is completely free to play in any browser, with native iOS and Android apps too.
Is it the same as Tango, Binairo or Takuzu?
It uses the same binary logic of balancing two symbols with no three in a row. Sun & Moon (Tango) adds =
and × clue markers and uses suns and moons instead of ones and zeros.
What is the daily challenge?
One shared 6×6 puzzle that is the same for every player each day. Solve it to build your streak and climb the
global leaderboard.
This game is interactive and needs JavaScript enabled to play.