A logic puzzle with 0s and 1s
If you want a logic puzzle that uses only 0 and 1, that is Binary Puzzle. You fill a square grid so each row and each column has equally many of each symbol, no three identical sit in a line, and every row and every column is different.
On DIGIGMA the live boards are 6×6 and 8×8. Tap a cell to cycle empty, 0, and 1. The digits already on the board stay put. There is only one way to finish.
Start on 6×6 Beginner. Finish a half, then watch for two identical symbols that would make three in a line. You do not need to guess.