How to Play Butterfly Sudoku
- Four 9Ã9 grids overlap in a 2Ã2 butterfly pattern (15Ã15 combined grid)
- Each grid follows standard Sudoku: every row, column, and 3Ã3 box must contain 1â9
- The cross-shaped shared region (gold tint) belongs to multiple grids simultaneously
- Tap a cell, then tap a number (1â9) or use your keyboard
- Toggle Notes mode for pencil marks âĸ Use Hint if stuck âĸ Check to find errors