Duo
Balance suns and moons in every row and column
- ~5 min
- Binary puzzle
- Logic
Play today's puzzle
How to play Duo
- 1Each row and column must have equal suns and moons
- 2No more than 2 of the same symbol in a row
- 3All rows must be unique, all columns must be unique
Tips and strategy for Duo
- Two matching symbols side by side force the squares around them to hold the opposite one.
- Tally each line as it grows: a row of six needs three suns and three moons.
- Test a coin-flip square against the uniqueness rule, since no two rows may match.
Questions about Duo
What are the rules of Duo?
Every row and column holds equal suns and moons, no line shows three matching symbols together, and no two lines repeat.
How long does a Duo board take?
The estimate is about five minutes, and the 6×6 grid usually falls to a careful pass.