Here is a puzzle with a twist – a sudoku made out of the twelve-tone scale. If normal sudoku puzzles are a breeze, give this tricky musical twist a try. Dominik Göbel, a Church musician at Svenska ...

Sudoku is arguably one of the best ways to spend a cold, rainy night at home by yourself. Solving a nine-by-nine sudoku square is a deeply satisfying — and often challenging — experience, and it’s for ...