How to play
Fill the grid with 0s and 1s so that every row and column
follows these rules:
- No three in a row. The same digit can't appear three times in a row, in either
direction.
011100
- Balanced rows and columns. Each row and column has the same number of 0s and
1s.
110101
- No duplicate lines. No two rows are identical, and no two columns are
identical.
A cell that breaks a rule turns red as soon as you place it, so you always know where to look.
Controls
- Click or Space cycles a cell through blank, 0, and 1.
- ← ↑ ↓ → move focus between cells.
- Enter submits the puzzle once it's full.
- Ctrl+Z (Cmd+Z on Mac) undoes a move,
Ctrl+Shift+Z or Ctrl+Y redoes it.
Or use the Undo/Redo buttons above the board.