Logic Masters Deutschland e.V.

Rules:
Sudoku: Place the digits 1-9 into each row, column and 3x3 box without repeats.

Numbers outside the grid are either Outside clues or Sum Frame clues:
Outside: The digits given outside the grid have to appear in the first three cells of that row or column in the corresponding direction.
Sum Frame: Numbers outside the grid indicate the sum of the first three digits in the corresponding row or column.

No clue can be valid for both Outside and Sum Frame at the same time. If a 3 cell sequence satisfies the Sum Frame, they cannot satisfy Outside, and vice-versa.

Example: A 12 clue means either:

• The first 3 cells sum to 12, OR (not AND!)
• The first 3 cells contain the digits 1 AND 2. (Both need to be included, just one isn't enough.)

Puzzle Links: You can play the puzzle in:

• F-Puzzles
• CTC
• Penpa+