Notre Dame researcher helps make Sudoku puzzles less puzzling // News // Notre Dame News // University of Notre Dame



Notre Dame researcher helps make Sudoku puzzles less puzzling // News // Notre Dame News // University of Notre Dame

Author: William G. Gilroy Published: October 11, 2012 A Sudoku puzzle. For anyone who has ever struggled while attempting to solve a Sudoku puzzle, University of Notre Dame complex networks researcher Zoltan Toroczkai and Notre Dame postdoctoral researcher Maria Ercsey-Ravasz are riding to the rescue. They can not only explain why some Sudoku puzzles are harder than others, they have also developed a mathematical algorithm that solves Sudoku puzzles very quickly, without any guessing or backtracking. Toroczkai and Ercsey-Ravasz, of Romania's Babeş-Bolyai University, began studying Sudoku as part of their research into the theory of optimization and computational complexity. They note that most Sudoku enthusiasts use what is known as a "brute force" system to solve problems, combined with a good deal of guessing. Brute force systems essentially deploy all possible combinations of numbers in a Sudoku puzzle until the correct answer is found. While the method is successful,

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