Medium Hexadoku Puzzles
Download free printable Hexadoku puzzles. A 16×16 twist on classic Sudoku, Hexadoku uses numbers 1-9 and letters A-G. Our printable puzzles come in medium levels and include answers to check your work. Download and print your Hexadoku puzzles today to improve your number-solving skills!
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16x16 Hexadoku - Medium - 18
16x16 Hexadoku - Medium - 19
16x16 Hexadoku - Medium - 20
16x16 Hexadoku - Medium - 5
16x16 Hexadoku - Medium - 4
16x16 Hexadoku - Medium - 15
16x16 Hexadoku - Medium - 17
16x16 Hexadoku - Medium - 2
16x16 Hexadoku - Medium - 10
16x16 Hexadoku - Medium - 13
16x16 Hexadoku - Medium - 6
16x16 Hexadoku - Medium - 16
16x16 Hexadoku - Medium - 3
16x16 Hexadoku - Medium - 14
16x16 Hexadoku - Medium - 9
Hexadoku / Hexadecimal Sudoku
Hexadoku, also known as 16×16 Sudoku, is an advanced variation of the classic 9×9 Sudoku puzzle. Instead of numbers 1-9, Hexadoku grids use hexadecimal digits: 1-9 and A-G. The rules remain the same as classic Sudoku; i.e. fill each row, column, and 4×4 region with unique symbols without repetition.
Basic Rules / How to Play
- Grid Size: The puzzle has 16x16 grid size made up of sixteen 4x4 sub-grids.
- Unique Numbers: Each row, column, and sub-grid must contain all digits from 1 to 9 and letters from A to G without repetition.
- Pre-Filled Numbers: The numbers given at the start of the puzzle must remain unchanged.
Need Help?
If you're stuck or want to learn advanced strategies, check out our Full Sudoku Guide.
How to Download & Print
Click the puzzle thumbnail to open the printable PDF. For the best results, select "Fit to Page" or "Scale to 100%" in your printer settings.
Need Help?
To get started, check out these instructions, goals and rules for how to solve Sudoku
How to Download & Print
Click the puzzle thumbnail to open the printable PDF. In the print dialog, ensure "Actual Size" is selected for the sharpest grid lines.
