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2020-Jan-20: For my more popular puzzles (including Sudoku, Kakuro, Inkies) I am now offering a "booklet" formatting option that produces two-puzzles per page, sideways. You can print these double-sided, fold & staple them to produce a booklet with the pages in the right order. You'll find this option on the final download screen for most one-per-page puzzles. Here's a sample. Answers are usually on a separate sheet so you can omit them, if you like.

Hexadecimal Sudoku Puzzles by Krazydad

Hexadecimal Sudokus (also known as 16x16 Sudoku) are a larger version of regular Sudoku that feature a 16 x 16 grid, and 16 hexadecimal digits. Each row, column and 4x4 block contains all the digits 0 thru F (or numbers from 1 to 16, in the decimal versions).

My Hexadecimal Sudoku puzzles are collected in 100 printable booklets per volume. Within each volume, the puzzles are also ordered by ascending difficulty. Each booklet contains eight puzzles, instructions, hints, and answers.

Puzzles are available in both hexadecimal (0-F) and decimal (1-16) notation.


Select a difficulty level:

How to use the hints

My puzzles contain a page of hints in addition to a page of answers.

The hints are puzzles grids that contain numbers showing the order in which the squares were solved by the computer. Although this is not necessarily the order you would solve the puzzle, it's probably pretty close.

Follow the numbered squares in order 1,2,3,4,5... until you find a square you haven't solved yet. This square (or the one or two immediately after it) is a good candidate to solve next.