Logic Masters Deutschland e.V.

Normal Sudoku rules apply. Each row, column, and 3x3 box contains each number from 1 to 9 exactly once.

Little Killer Sudoku rules apply. Higher digits at a diagonal pointed at by an arrow, sum up to the number behind the arrow. The digits on a diagonal may repeat (except 1 and 9).

Lower digits at the same diagonal act like sandwich clues (- is 0). They show the sum of the digits sandwiched between 1 and 9 on that diagonal. (The f-puzzles can't handle this, so I recommend you to turn off the hightlight conflicts function).

The puzzle is also available online.