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Neon Bubble ShooterHow to play Duogrid — Sun & Moon Puzzle
Fill every cell with a sun or a moon following three simple rules.
The three rules
No three identical symbols consecutively in a row or column, and every row and every column must hold equal numbers of each symbol.
Tips
Start from the rows or columns that are already half full — forced cells cascade quickly and finish much of the board for you.
More games like Duogrid — Sun & Moon Puzzle
Features
- Three clean, easy-to-learn rules
- Four board sizes with daily puzzles
- Satisfying chain-reaction deductions
- Instant validation and hints
- Archive of past daily boards
- Free browser game — no download
Duogrid — Sun & Moon Puzzle: Facts
FAQ
Is Tango free?
Yes, it is completely free in your browser — no download, no registration.
What are the rules?
No three identical symbols in a row or column, and every row and column must be balanced between suns and moons.
Is there a new puzzle every day?
Yes — each board size receives its own official daily puzzle, and past days stay available in the archive.
Does it work on phones?
Yes, the tap controls are designed for touch screens first.
About Duogrid — Sun & Moon Puzzle
Tango belongs to the Takuzu family of binary puzzles, refined here into a slick daily ritual. The rules fit in a sentence — balance every row and column, and never place three of the same symbol in a line — yet the deductions can chain beautifully. Because every placement constrains its whole row and column, a single forced cell can collapse an entire region of the board, which gives Tango the satisfying cascade feeling Sudoku players chase. Four grid sizes make it welcoming for beginners and still demanding for veterans, and each size gets its own curated board every day, so the daily set is a short, sharp logic workout you can complete anywhere. The board is deliberately uncluttered: tap to place a sun or a moon, long-press or toggle to clear, with immediate validation available. Hints reveal a single safe cell rather than spoiling the whole solution. All progress is saved locally, and the archive lets you replay any previous day.
Want a calmer break? Marble Sort is a satisfying color-sorting puzzle, perfect for short sessions.