Logic Masters Deutschland e.V.

Standard irregular Sudoku rules - each row, column, and 9-cell region must contain the digits 1-9. Diagonal constraint applies - each main diagonal of the puzzle must include the digits 1-9. Standard arrow rules - the digit i the circle must be the sum of the digits along the arrow.

Trying arrows instead of thermos for part 3 of the series. Penpa link included for solvers who would like to use letters as placeholders for unknown digits.

Puzzle is available at F-puzzles or Penpa.

As always, any feedback you have is highly appreciated, especially for a first try with arrows.