Our jigsaw hexadoku puzzles are 16 X 16 fiendish sudoku. Instead of nine 3 X 3 square areas, we have 16 regions of irregular shapes each with 16 squares. The rules of the game are the same as for a classic sudoku. You need to find by reasoning 16 different digits by row, column and region.

To facilitate entering values and to reduce the size of the grid on the screen, the numbers are represented here by the following hexadecimal digits: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E and F.
The hexadecimal number system, is a number system that uses 16 unique symbols to represent a particular value. Those symbols are 0-9 and A-F. The hexadecimal is especially useful in computer science because the hexadecimal numbers are a shorthand way to represent binary numbers.

You have 60,000 puzzles presented in two forms and three levels.
Forms: Symmetrical or asymmetrical.
Levels: beginner, confirmed, expert.

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Direct Printing

Our irregular jigsaw hexadoku are printable through the menu 16X16 JIGSAW SUDOKU and the link Print puzzles.
You can select prints in white, gray, hatched or colored.

Description

Each of our problems has only one solution. All our hexadoku are solvable by a sequence of logical reasoning. No unfounded hypothesis or multiple choice is necessary to reach any solution.

To distinguish better between areas, there are four types of download:
• White background.
• Hatched background.
• Shaded background.
• Colored background.

All jigsaw 16x16 sudoku on this site have solutions available for downloading. They are all created by sudoku-puzzles-online.com .

Choice of puzzles pdf: Our jigsaw hexadoku symmetrical puzzles are a little easier to solve than asymmetrical ones. Indeed, the symmetrical ones have an additional necessity - precisely to be symmetrical - so they have fewer empty squares to solve. Also note that the appearance of difficulty is subjective, because different solving techniques suit different people.

Why play jigsaw hexadoku? Irregular hexadoku is a very hard variation of sudoku and classic hexadoku. It allows adepts of sudoku to find new visual configurations. The beginner and confirmed levels are solvable by logical deduction. Only the expert level requires you to pencil in the candidates if you cannot see the solution.

Levels PDF to download

• Puzzles "Beginner" are fully resolvable by "Inclusion" while accepting other methods.
• Puzzles "Confirmed" are fully resolvable by "Inclusion" and "Exclusion" while admitting to other methods.
• Puzzles "Expert" are solvable by "Inclusion", "Exclusion" and "Pairs exclusive".
For more details on these three methods for resolution, identical to the regular sudoku, see: General help.

Symmetrical and asymmetrical PDF

An irregular 16 x 16 sudoku puzzle, is symmetrical when the areas that compose it are arranged equally around the four central squares known as the center of symmetry. This is only esthetic and does not change the resolution mode of the problem. Indeed it is the puzzle that is symmetrical and not the solution. However, the advantage of non-symmetrical grids is that, having one less constraint, they allow the elaboration of more difficult problems.

Broadcast rights

All irregular 16x16 puzzles PDF of this site are created by sudoku-puzzles-online.com and these puzzles can be reproduced free on condition that the link to sudoku-puzzles-online.com appears on every reproduced page.