Logic Masters Deutschland e.V.

Rules:

• Sudoku: Place the digits 1-9 once each in every row, column and box.
• Disjoint Groups: Cells in the same position relative to their 3x3 box may not contain the same digit. (For example: The cells in the top-left position of the 3x3 boxes such as R1C1, R4C7 and R7C4 may not contain the same digits.)
• Palindrome: The gray line is a palindrome, digits on it read the same in both directions.
• Killer Cages: Digits in a cage must sum to the total in the top-left corner of the cage.
• Sandwich Sums: Clues outside the grid show the sum of the digits between 1 and 9 in that column.

Solve the sudoku here:
SudokuPad