Choose an irregular jigsaw sudoku to play online
60,000 irregular jigsaw sudoku to choose from


Irregular sudoku puzzle Each puzzle consists of a 9x9 grid containing numbers in various squares. Your task is to fill all the blank squares so that the numbers 1 to 9 appear once in each row, column and irregular shaped box.

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

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


Choose a random puzzle: 
Levels:  OK button
Forms:  Symmetric      Asymmetric 

Select a puzzle 
Levels:  OK button
Number:    (From 1 to 10,000)
Forms:  Symmetric      Asymmetric 



Directions:

Choice of puzzles: Our irregular sudoku were designed and graded so that at the same level the higher the puzzle number, the more difficult the solution, with this nuance that in our classification, at equal levels and numbers, symmetrical puzzles are a little easier to solve than asymmetrical ones. Indeed, the symmetrical ones have an additional constraint - precisely to be symmetrical - so they have fewer empty squares to solve. Also note that the aspect of difficulty is subjective, because different solving techniques suit different people.

Why play irregular sudoku? Irregular sudoku is a variation of sudoku. It allows veterans 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 of grids to play online:

• 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 techniques similar to those of regular sudoku, see: General help.


Symmetrical and asymmetrical puzzles:

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


Printing:

Our irregular jigsaw sudoku are printable through the menu IRREGULAR SUDOKU and the link Print grids.
You can select prints in white, gray, hatched or colored.


Free reproduction:

All irregular jigsaw puzzles offered on this site are created by top-sudoku.com. These puzzles can be reproduced free on condition that the link to en.top-sudoku.com appears on every reproduced page.



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