The goal is to fill every empty cell so that each row, each column, and each of the sixteen 4x4 boxes contains a complete set of symbols, with no repeats anywhere.
contains all characters from 0 to F without repetition. Why You Should Print Your Hexadoku Puzzles hexadoku 16x16 sudoku puzzles to print
There is no shame in using full notation (writing all 16 candidates in tiny numbers). For expert-level Hexadoku, this is mandatory. Many printable puzzle sheets include a tiny grid inside each cell specifically for this purpose. The goal is to fill every empty cell
Fill every row, column, and 4×4 block with each symbol . For expert-level Hexadoku, this is mandatory
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If two cells in a 4x4 block can only contain the same two numbers (e.g., 'A' or 'B'), you know those two cells are occupied by those two numbers, allowing you to eliminate 'A' and 'B' from all other cells in that row, column, or 4x4 block. Where to Find Printable 16x16 Puzzles
Pick a single character—for example, the letter . Look at adjacent rows and columns of 4x4 blocks. Use the "A"s already on the board to eliminate rows and columns, narrowing down exactly where "A" must live in an unsolved block. 3. Track Alphanumeric Pairs