Blog  |   Puzzles  |   Books  |   About

It takes 17 clues to make a Sudoku

The science journal Nature reports that a mathematician has proven that it takes 17 clues to make a Sudoku.

Gary McGuire of University College Dublin showed this in a proof posted online on January 1st (apparently he wasn’t partying on new year’s eve). This means that sudoku puzzles with 16 or fewer clues do not have a unique solution.


Comments are closed.