Logic Masters Deutschland e.V.

This puzzle is the puzzle I submitted to Round 1 of Agent's Puzzle Agency Championship(PAC).

Rules:

Normal Sudoku Rules apply.

Killer(Knapp Daneben): Digits in cages must sum to one less or one greater than the number in the top-left corner of the cage. Digits in cages may not repeat.

XY-Difference Pairs (Knapp Daneben): A pair of horizontally connected cells separated by a diamond has a difference of one less than or one greater than the leftmost digit in its row. A pair of vertically connected cells separated by a diamond has a difference of one less than or one greater than the topmost digit in its column. Not all diamonds are necessarily given.

Play the puzzle on SudokuPad.