Tool / solver to solve irregular 8x8 Sudokus, with an 8x8 grid with blocks to be defined, the other rules (rows and columns) remain unchanged.
8x8 Sudoku Solver - dCode
Tag(s) : Number Games
dCode is free and its tools are a valuable help in games, maths, geocaching, puzzles and problems to solve every day!
A suggestion ? a feedback ? a bug ? an idea ? Write to dCode!
An 8x8 sudoku is a sudoku of 64 cells (eight rows and eight columns) that can be solved like a classic 9x9 sudoku except for its irregular blocks, whose format depends on the grids played.
The 8x8 sudokus resolution follows the same reflection steps as classical sudokus, but with only 8 digits (or 8 distinct characters).
On dCode, indicate the contents of the boxes (with only digits or letters).
Example: The content 8 6 3 5 4 2 7 1
can be pasted in the first box to get
8 | ␣ | ␣ | ␣ | ␣ | ␣ | ␣ | ␣ |
␣ | ␣ | ␣ | ␣ | ␣ | ␣ | 6 | ␣ |
␣ | ␣ | ␣ | 3 | ␣ | ␣ | ␣ | ␣ |
␣ | ␣ | 5 | ␣ | ␣ | ␣ | ␣ | ␣ |
␣ | ␣ | ␣ | ␣ | ␣ | 4 | ␣ | ␣ |
␣ | ␣ | ␣ | ␣ | 2 | ␣ | ␣ | ␣ |
␣ | 7 | ␣ | ␣ | ␣ | ␣ | ␣ | ␣ |
␣ | ␣ | ␣ | ␣ | ␣ | ␣ | ␣ | 1 |
To indicate the blocks/groups of 8 cells, click under the grid on a predefined example or fill countours manually by pointing them.
The program resolves the 8x8 sudoku by simulating each of the deduction steps of the player and displays each resolution steps with their explanations.
dCode retains ownership of the "8x8 Sudoku Solver" source code. Any algorithm for the "8x8 Sudoku Solver" algorithm, applet or snippet or script (converter, solver, encryption / decryption, encoding / decoding, ciphering / deciphering, breaker, translator), or any "8x8 Sudoku Solver" functions (calculate, convert, solve, decrypt / encrypt, decipher / cipher, decode / encode, translate) written in any informatic language (Python, Java, PHP, C#, Javascript, Matlab, etc.) or any database download or API access for "8x8 Sudoku Solver" or any other element are not public (except explicit open source licence like Creative Commons). Same with the download for offline use on PC, mobile, tablet, iPhone or Android app.
Reminder: dCode is an educational and teaching resource, accessible online for free and for everyone.
The content of the page "8x8 Sudoku Solver" and its results may be freely copied and reused, including for commercial purposes, provided that dCode.fr is cited as the source.
Exporting the results is free and can be done simply by clicking on the export icons ⤓ (.csv or .txt format) or ⧉ (copy and paste).
To cite dCode.fr on another website, use the link:
In a scientific article or book, the recommended bibliographic citation is: 8x8 Sudoku Solver on dCode.fr [online website], retrieved on 2025-04-16,