Logic Masters Deutschland e.V.

• Normal sudoku rules apply: Place the digits 1-9 once each in every row, column, and 3x3 box.
• XY Sandwiches: Clues outside the grid give the sum of the digits between the Xth and Yth cells seen from the direction of the clue, where X and Y are the first two cells seen from the direction of the clue. For example, a row reading 581346792 could have an XY Sandwich clue of 13 on the left, summing the digits between the 5th and 8th cell from the left, and a clue of 29 on the right, summing the digits between the 2nd and 9th cell from the right.

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