Logic Masters Deutschland e.V.

Rules:

• Normal sudoku rules apply:each row, column, and region indicated by thick borders in the grid must contain the digits 1 to 9 once each.
• Cells in cages must sum to the clue given in the top left corner of the cage. Digits cannot repeat in a cage.
• Each pair of diagonally adjacent cells which are both a knight’s move away from a gray cell must sum to the digit in that gray cell. E.g. the 9 in the following image is a knight. All red cells are knights moves from the 9 and form four diagonally adjacent pairs of cells summing to 9. (The pairs do not have to be unique)

You can play this puzzle here:

• fpuzzle: https://f-puzzles.com/?id=yj3kc7vm
• CTC app: tinyurl.com/4jb6bhrb

Good luck! Always open to constructive criticism.