Binairo is a puzzle game that requires logic thinking. The starting grid is filled with some 1s and 0s and the objective is to fill each cell with a 1 or a 0, according to a set of simple rules: 1) no more than two consecutive 1s or 0s are allowed, 2) each row and column has an equal amount of 1s and 0s, and 3) two rows (and two columns) cannot be identical.
Binairo
The objective in Binairo is to use logical reasoning to fill the complete grid with 0s and 1s.
The grid in Binairo is always square and varies in size, ranging from as small as 6x6 to as large as 16x16.
Fill each cell with 1s and 0s, according to these conditions:
Always start with applying the first rule saying that no more than two consecutive 1s or 0s are allowed.
There are two subcases:
The number of 1s and 0s that a row or column should contain is known. E.g. when playing a 10x10 puzzle, each row (or column) has five 1s and five 0s.
When a row or column already has the required amount of 1s or 0s, fill its empty cells with the other symbol.
There is another way the rule about consecutive 1s and 0s can be used. Imagine a 10x10 grid with a row that already has four 1s. This means this row requires one additional 1. The cells that are not filled with this 1, will be filled with a 0. Go over the empty cells in the row one by one and check if filling in a 1 will result in three (or more) consecutive 0s when a 0 is filled in the other empty cells in the row.
There are multiple sources of the puzzle. The first known is Leo De Winter from Belgium, who registered the Binero puzzle in 2006. Two other Belgians, Frank Coussement and Peter De Schepper, registered the name Binairo in 2009. Around the same time Adolfo Zanellati from Italy invented the game with the name Tohu Wa Vohu, a Biblical Hebrew phrase.
The name Binairo / Binero refers to the usage of 1s and 0s. It is also common to play the game with X’s and O’s as in Tic-Tac-Toe (can be changed in the Settings). This explains why Binairo is also known as Tic-Tac-Logic.
Other names for Binairo are Takuzu, Binero (in France), Tohu-Wa-Vohu (used by one of the inventors Adolfo Zanellati), Eins und Zwei (in Germany), Sudoku Binary, Binary Puzzle, Binoxxo, and Zernero.
Other puzzle games that require you to use logic are Sudoku, Kakuro and Futoshiki.
Binairo can be played in all modern browsers, on all device types (desktop, tablet, mobile), and on all operating systems (Windows, macOS, Linux, Android, iOS, ...).
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