Tango is a balance puzzle — fill every cell with a sun or a moon so each row and column has equal counts, avoid three identical symbols in a row, and satisfy equal (=) and opposite (×) signs between neighbors. This guide covers the constraint-reading and pattern techniques that make Tango boards click.
Tango puzzle strategies
Tango Puzzle Strategies
LogicBalance the grid · trains pattern balance
- Pattern recognition
- Working memory
- Attention
Balance rules, constraint signs, and pattern recognition for sun-and-moon grids.
Tango rulesRules
The three rules in practice
Equal counts
Each row and column needs the same number of suns and moons.
No three in a row
Never three identical symbols horizontally or vertically.
=×
Sign constraints
= means neighbors match; × means they must be opposite symbols.
Rules 2 and 3 interact constantly. An equal sign between two cells often forces a chain of matching symbols — and that chain can trigger the no-three rule if it grows too long.
Technique
Read signs before filling
=
Same symbol
If one side is sun, the other is sun
=
×
Opposite symbols
If one side is sun, the other is moon
×
When a cell is empty but its neighbor is filled, the sign tells you what the empty cell must be. Work these forced placements first.
Technique
The no-three rule creates forced opposites
Two at the end force the empty cell to be a .
on both sides force the middle cell to .
Scan for these patterns after every placement. They are the Tango equivalent of sudoku's "naked single."
Technique
Balance counting
- If a row already has four , every remaining empty cell in that row must be .
- If a row has three and one empty, that empty cell must be to avoid a fourth sun.
Balance counting becomes critical in the last third of the grid when few empty cells remain.
Technique
Equal chains
Two cells linked by = form a chain. If one is known, the other matches.
Watch for chains that approach length three — an = chain of three identical symbols violates the no-three rule. When a chain would force three in a row, adjacent non-chain cells must be the opposite symbol.
Technique
Opposite pairs and balance
- In a row missing one sun and one moon with a × pair still empty, the pair must be one of each.
- If the row already has excess suns, the × pair must be moon-sun (with moon on the side that still needs moons).
Technique
Prefilled cells are anchors
- Apply sign constraints from each given.
- Run no-three scans on adjacent rows and columns.
- Update balance counts.
Pitfalls
Common mistakes
- Ignoring vertical no-three — players check horizontal runs but miss vertical triples.
- Forgetting balance — a placement that satisfies signs may break the equal-count rule.
- Filling too fast — one wrong symbol early cascades into many conflicts.
Practice
Practice path
| Stage | What to do |
|---|---|
| Rules | Tango how-to-play |
| Demo | Tango demo |
| Strategy practice | Random Tango |
| Dailies | Tango archive |
Tango rewards patience with signs. Slow down on the first pass, mark forced cells, then accelerate as the grid fills.
FAQ
Guide FAQ
Quick answers about this puzzle type and how to practice.
Tango is a logic puzzle where you fill every cell with a sun or moon. Each row and column must have equal counts, you cannot place three of the same symbol in a row, and signs between cells mark equal or opposite pairs.
An equal sign (=) means adjacent cells must match. A cross (×) means they must be opposite — one sun and one moon.
Play Tango puzzles online with archived dailies, random mode, hints, and step-by-step solutions on Puzzle Games.
Keep exploring
Related pages
Play puzzles, read rules, or browse archives.