Logic Masters Deutschland e.V.

- Normal sudoku rules apply.

- Clues outside the grid are X-Sandwhich clues. Where the first 1 or 2 digits seen from that clue, when read in reading order from left-to-right or top-to-bottom, give the sum of the digits between 1 and 9 in their respective row or column.

- All valid clues are given.

Below is a 6x6 example puzzle