How to play Binary Puzzle
Binary Puzzle is a 0-and-1 grid. On this site the live boards are 6×6 and 8×8. Each row and column has equally many 0s and 1s, no three identical in a line, and every row and every column is unique. There is only one way to finish the grid.
The full how-to — rules, how to play, and beginner strategy — is here: How to play Binary Puzzle. Or Play Binary Puzzle.