Takuzu, or binary puzzle, is an exciting puzzle with only the numbers 0 and 1 that will definitely challenge your mental skills. The game offers puzzles of three different sizes: small (8x8), medium (10x10) and large(12x12). - There cannot be more than two 0s or 1s next to or below each other; - There must be an equal number of 0s and 1s in each row and column; - Each row and each column must be unique. This Windows 8.1 version offers full support for the new Windows 8.1 window resizing options and includes a timer and statistics. And if you really like the game, you can now use the share charm to share a link to the app in the Windows Store with your friends!