How to play Sun & Moon
Sun & Moon is a logic puzzle also known as Binairo, binary puzzle or Takuzu. Fill every cell with a sun (light circle) or a moon (dark circle). There are three rules.
- No more than two of the same symbol in a row, horizontally or vertically.
- Every row and column has the same number of suns and moons.
- No two rows may be exactly the same, and no two columns either.
Tips for beginners
- Two identical symbols side by side must be flanked by the opposite symbol on both ends.
- A single gap between two identical symbols must be the opposite symbol.
- Once a line has half its cells of one symbol, the rest must be the other.
Cells that break a rule turn red. Every Haru Puzzle Sun & Moon puzzle is checked to be solvable by logic alone, with no guessing.