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!

Tool/solver to resolve irregular sudoku 7x7, ie with a 7x7 grid, but with non-square irregular blocks, the rule of rows and columns remain unchanged.

Answers to Questions

How to solve a 7x7 Sudoku grid?

A 7x7 sudoku is similar to a 9x9 classic sudoku, the difference is in the blocks that are irregular and whose shape depends on the played grids (the so-called blocks of size 7 form some sort of puzzle in the grid).

The sudoku7x7 resolution uses the same deduction steps as classical sudoku, but is limited to 7 digits (or 7 distinct characters).

On dCode, the resolution is done by indicating the contents of the boxes (only letters or numbers). NB: possibility to copy and paste 49 characters with a space as empty box.

To indicate the blocks of 7 boxes, click under the grid on one of the predefined examples or fill them manually by pointing the contours.

Example: The content 1 2 5 3 4 6 7 can be pasted in the first box to get

1

2

5

3

4

6

7

How does the step by step works?

The program resolves the 7x7 sudoku by simulating the deduction steps of a player and displays each of the steps in the resolution with an explanation.

Source code

dCode retains ownership of the source code of the script 7x7 Sudoku Solver online. Except explicit open source licence (indicated Creative Commons / free), any algorithm, applet, snippet, software (converter, solver, encryption / decryption, encoding / decoding, ciphering / deciphering, translator), or any function (convert, solve, decrypt, encrypt, decipher, cipher, decode, code, translate) written in any informatic langauge (PHP, Java, C#, Python, Javascript, Matlab, etc.) which dCode owns rights will not be released for free. To download the online 7x7 Sudoku Solver script for offline use on PC, iPhone or Android, ask for price quote on contact page !