Sudoku Solver
Sudoku is a logic-based number-placement puzzle. The objective is to fill a 9×9 grid with digits so that each column, each row and each 3×3 sub-grid contains all of the digits from 1 to 9. The puzzle creator provides a partially completed grid, which typically has a unique solution.
For more information about this game, you should report to this site.
For example, the following grid
 |
gives the result |  |
A puzzle is represented as a list of lists with digits. A zero value means that the value hasn't been set.
Input: The initial 9x9 grid composed by integers as a list of lists.
Output: The result of the sudoku as a list of lists.
Example:
checkio([[5, 0, 0, 7, 1, 9, 0, 0, 4],
[0, 0, 1, 0, 3, 0, 5, 0, 0],
[0, 0, 0, 0, 0, 0, 0, 0, 0],
[0, 8, 5, 9, 7, 2, 6, 4, 0],
[0, 0, 0, 6, 0, 1, 0, 0, 0],
[0, 2, 6, 3, 8, 5, 9, 1, 0],
[0, 0, 0, 0, 0, 0, 0, 0, 0],
[0, 0, 3, 0, 5, 0, 2, 0, 0],
[8, 0, 0, 4, 9, 7, 0, 0, 6]]) == [[5, 6, 8, 7, 1, 9, 3, 2, 4],
[9, 7, 1, 2, 3, 4, 5, 6, 8],
[2, 3, 4, 5, 6, 8, 7, 9, 1],
[1, 8, 5, 9, 7, 2, 6, 4, 3],
[3, 9, 7, 6, 4, 1, 8, 5, 2],
[4, 2, 6, 3, 8, 5, 9, 1, 7],
[6, 1, 9, 8, 2, 3, 4, 7, 5],
[7, 4, 3, 1, 5, 6, 2, 8, 9],
[8, 5, 2, 4, 9, 7, 1, 3, 6]]
How it is used:
This is a classic constraint satisfaction problem.
CSPs are mathematical problems defined as a set of objects whose state must satisfy a number of constraints or limitations.
CSPs are the subject of intense research in both artificial intelligence and operations research, since the regularity in their formulation provides a common basis to analyze and solve problems of many unrelated families.
And of course now you can use this code to help your gramma solve all of the puzzles.
Precondition: Each test case has only one unique solution.
∀ x ∈ puzzle : 0 ≤ x < 10
CheckiO Extensions allow you to use local files to solve missions. More info in a blog post.
In order to install CheckiO client you'll need installed Python (version at least 3.8)
Install CheckiO Client first:
pip3 install checkio_client
Configure your tool
checkio --domain=py config --key=
Sync solutions into your local folder
checkio sync
(in beta testing) Launch local server so your browser can use it and sync solution between local file end extension on the fly. (doesn't work for safari)
checkio serv -d
Alternatevly, you can install Chrome extension or FF addon
checkio install-plugin
checkio install-plugin --ff
checkio install-plugin --chromium
Read more here about other functionality that the checkio client provides. Feel free to submit an issue in case of any difficulties.
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