Logic Masters Deutschland e.V.

- Normal Sudoku rules apply
- On every red X, the sum of the outer 4 digits equals the inner digit
- On every green X, the sum of the digits is an integer multiple of 10
- The sum of the digits on a red or green X is unique in the puzzle, i.e. no two red or green X's with the same sum exist
- Digits separated by a small black X sum to 10 (not all are given)

Play on SudokuPad