Sudoku Solver Python

Generating and solving sudoku puzzles with a unique solution in python using a backtracking depth first search algorithm. In part 1 of this sudoku solver with python tutorial i explain how we are going to go about solving the problem and discuss the algorithm known as backtracking backtracking is simply reverting back to the previous step or solution as soon as we determine that our current solution cannot be continued into a complete one. In this post i m going to walk through how to write a sudoku solver using logic and basic python data structures.

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From now on you will win all sudoku challenges.

Sudoku solver python. It solves the two files of 50 easy and 95 hard puzzles see also the 95 solutions eleven puzzles i found under a search for hardest sudoku and a selection of random puzzles. Install python 2 pip install py sudoku python 3 pip3 install py sudoku usage basic usage from sudoku import sudoku initializes a sudoku puzzle with 3 x 3 sub grid and generates a puzzle with half of the cells empty puzzle sudoku 3. Solved 50 of 50 easy puzzles avg 0 01 secs 86 hz max 0 03 secs. Neil reported it took him about three hours to write his solver mine took a similar time but i was distracted by trying to solve a very nasty puzzle i found online which i now suspect to be impossible or at least ambigous.

A simple python program that generates and solves m x n sudoku puzzles. In this post i am going to share with you a sudoku solver written in python. There are several algorithms that can be used to solve sudoku puzzles and in this post we will use a backtracking algorithm to both generate and solve the puzzles. Simple sudoku solver in python august 31 2013.

Below is the output from running the program at the command line. Some of us even bet on this game but did you know that you can use python to make a sudoku solver. This puzzle solving ai like many artificial intelligence tasks doesn t need. We all know that sudoku is a great game.

Python sudo py all tests pass. My python sudoku solver is available to download here.