Thomas Snyder (aka Dr. Sudoku) is a three-time World Sudoku Champion and six-time US Puzzle Champion, as well as the author of several books of puzzles. His puzzles are hand-crafted, with artistic ...

I suspect that among the readers of this column, few are unfamiliar with Sudoku. The same cannot be said about Sudokill, a game invented for a graduate class I teach. Sukokill is a two-person game in ...

You might think it's simply a puzzle for whiling away the time, but the mathematics of sudoku is at the heart of modern communication Last month Finnish mathematician Arto Inkala challenged the world ...