Normal sudoku rules apply, except the numbers in the cells contained within dotted lines add up to the figures in the corner. No number can be repeated within each shape formed by dotted lines. To see ...

Normal sudoku rules apply, except the numbers in the cells contained within dotted lines add up to the figures in the corner. No number can be repeated within each shape formed by dotted lines. To see ...

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 ...