There Is No 16-Clue Sudoku: Solving the Sudoku Minimum Number of Clues Problem via Hitting Set Enumeration

Gary McGuire, Bastian Tugemann, Gilles Civario. There Is No 16-Clue Sudoku: Solving the Sudoku Minimum Number of Clues Problem via Hitting Set Enumeration. Experimental Mathematics, 23(2):190-217, 2014. [doi]

Abstract

Abstract is missing.