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Tool/solver to resolve irregular sudoku (any size), ie with a NxN grid and non-square blocks, the rule of rows and columns remain unchanged.

Answers to Questions

How to fill the Jigsaw Sudoku grid?

Irregular Sudoku NxN (called Jigsaw or Chaos) is identical to a classic sudoku, except for the blocks that are no longer regular square elements, but polyominoes that form a kind of jigsaw puzzle.

Indicates cells values one by one (it is also possible to make a copy-paste with space as empty cell) as in a classic sudoku.

Only letters or digits are allowed.

Blocks of 9 cells can be selected within predefined examples under the grid or indicated manually by clicking on borders.

Example: A 9x9 grid (copy/paste) forms nonominos 97 1 5 5 9 2 18 4 8 7 26 92 3 6 2 9 19 457 to get:

9

7

1

5

5

9

2

1

8

4

8

7

2

6

9

2

3

6

2

9

1

9

4

5

7

For larger grids, the solver only accepts one character per cell, so use letters.

Example: Write A for 10, B for 11 etc.

How does the step by step works?

Software solves the Sudoku, similarly to an human, and display each step of its progress to understand without explaining.

Source code

dCode retains ownership of the online 'Irregular NxN Sudoku Solver' tool source code. Except explicit open source licence (indicated CC / Creative Commons / free), any algorithm, applet or snippet (converter, solver, encryption / decryption, encoding / decoding, ciphering / deciphering, translator), or any function (convert, solve, decrypt / encrypt, decipher / cipher, decode / encode, translate) written in any informatic language (PHP, Java, C#, Python, Javascript, Matlab, etc.) no data, script or API access will be for free, same for Irregular NxN Sudoku Solver download for offline use on PC, tablet, iPhone or Android !

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