Mega Sudoku (16×16)
The ultimate Sudoku challenge! 256 cells using digits 1-9 and letters A-G. This can take hours to solve.
Rules:
- Each row must contain 1-9 and A-G (16 unique characters)
- Each column must contain 1-9 and A-G (no repeats)
- Each 4×4 block must contain 1-9 and A-G (no repeats)
- Use keyboard to type numbers or letters
Characters: 1 2 3 4 5 6 7 8 9 A B C D E F G
Use 1-9 and A-G to fill the mega 16×16 grid!