Binary Puzzle rules
Binary Puzzle is a 0-and-1 grid. On DIGIGMA the live boards are 6×6 and 8×8. You fill every empty cell with 0 or 1.
Each row has equally many 0s and 1s. Each column does too. No three identical symbols sit in a line — in a row or in a column. No two rows are the same, and no two columns are the same.
The digits already on the board stay put. There is only one way to finish the grid. Tap a cell to cycle empty, 0, and 1.
A puzzle is solved when every cell is filled and those four rules hold. Start on 6×6 Beginner. You do not need to guess.
The full how-to, with first moves, is How to play Binary Puzzle. Or Play Binary Puzzle.