Smart BinairoPlay Binairo and Takuzu online
Two symbols. More possibilities than you think.
Opening your puzzle…
Nicely reasoned. Puzzle complete!
How to play
Use two symbols, with equal numbers of each in every row and column. Never place three identical symbols in a row. Completed rows and columns must be different. An equals sign joins matching neighbours; × joins different neighbours.
A selection of starter puzzles with local progress on this browser. The iOS apps have their own features and purchase plans.