Tango: Logic Puzzle with Suns and Moons
Tango is an elegant puzzle where you fill a 6×6 grid with two types of symbols, following several rules at once. Simple rules hide deep logic.

How to Play
Each cell becomes either a sun (●) or a moon (☽). Each row and column must contain exactly three suns and three moons. Placing three identical symbols in a row is forbidden. Some cells have signs between them: = means same, × means different.
Strategy for Winning
Start with cells where = or × connects an already filled cell — this gives you two positions at once. Then check rows and columns for three in a row. If a row already has three suns, all the rest must be moons.
Why Tango Is Different from Other Puzzles
In classic Sudoku, digits are unique in each row/column. In Tango, there are only two symbols, but the "no three in a row" constraint creates completely different logic. It's a fresh take on the logic puzzle genre.