Take two—two numbers, that is! All you need to solve these tricky and entertaining binary puzzles are 0, 1, and a little cleverness. The aim is to fill in the grid with zeros and ones until there are an equal number of each in every row and every column. But no more than two of the same number can be next to or under each other, and no two rows or columns can look exactly alike.

Each puzzle has only one correct solution and there's an explanation of all the strategies that will turn newcomers into masters. Start with the easier ones, and as your skills increase, tackle the super-challenges.

Puzzle lovers will find BINARY a brilliant new spin on Sudoku!

PeterFrank was founded in 2000 by Peter De Schepper and Frank Coussement. Their internationally registered trademark, BrainSnack®, stands for challenging, language-independent, logical puzzles and mind games for kids, teens, and adults. It also stands for high quality puzzles. Whether they are made by hand like the visual puzzles or generated by computer like Sudoku, all puzzles are tested by the target group they were made for before using them. In order to guarantee that the computer generated puzzles can actually be solved by humans, they make programs that only use human logic algorithms.