Logic Masters Deutschland e.V.

This puzzle was inspired by XeonRisq using the Remote Sums constraint that he created. This puzzle may be closer to 5-stars for difficulty depending on your experience with X-sums puzzles.

Ratings, comments, and feedback are much appreciated! Please feel free to reach out to me on Discord if you have any comments or questions. Please also feel free to try my other puzzles here.

Rules:

• Normal sudoku rules apply.
• Kropki pairs: Numbers separated by a white dot are consecutive, and numbers separated by a black dot have a 1:2 ratio. Not all dots are given.
• X-sums: Clues outside the grid (gray cells) give the sum of the first N digits in their respective row or column, where N is the digit nearest the clue.
• Remote Sums: A number X in a cage points to a second number Y located X cells away vertically or horizontally. The number in the top left corner of the cage indicates the sum of X+Y; the "?" indicates any positive value. Cages inside the grid may point to cells outside the grid and vice versa.

Penpa+: https://tinyurl.com/2ge57gk4

SudokuPad: https://tinyurl.com/4k23tswr

If solving with SudokuPad, I suggest using corner/center pencil marks to notate the X-sums clues in the gray cells to avoid issues with the conflict checker.