![]() ![]() However, I found his structure unintuitive. I used his set of 95 hard puzzles and 11 hardest puzzles to test my code. He uses a more comprehensive search and constraint propagation strategy and provides a thorough analysis with multiple puzzles. Her code however cannot solve hard puzzles because it only follows a simple constraint propagation strategy. I liked the overall structure of her code, and used it to refactor some of mine. There are two articles I would like to mention that were particularly helpful. I tackled this problem by myself, before comparing it to other online solvers. ![]() Other solversĪfter a few days of manually playing Sudoku, I naturally decided to write a solver for it. But all are remarkably easy to solve with computers. These puzzles range in difficulty, and some can be surprisingly hard to solve by hand. The goal of Sudoku is to full a 9x9 grid where each row, column and 3x3 region contains each of the numbers from 1 to 9. “Sudoku” is Japanese for “single number”. Introduction A 17-clue Sudoku puzzleĪccording to Wikipedia, this popular brain teaser puzzle rose to prominence in 2004. Also head over to his own website for a tutorial on Eel.Īs an example of the UI, here is the solution for the 13 March 2021 NY Time’s Hard puzzle: solution. You can download the solver and UI code from my GitHub repository. Update 13-03-2021: Erfan Paslar made a neat user interface for my solver using JavaScript and the Eel Python package. Even the most challenging Sudoku puzzles can be quickly and efficiently solved with depth first search and constraint propagation. This post describes a Sudoku solver in Python. ![]()
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