Logic Masters Deutschland e.V.

Normal sudoku rules apply
Each row, column and 3x3 box contains the digits 1 to 9.

Standard arrow rules apply
Digits along an arrow must sum to the digit in its circle. Digits may repeat along an arrow.

Standard XV rules apply
Cells separated by a V must sum to 5. Cells separated by an X must sum to 10. Not all possible X's and V's are necessarily given (no negative constraint).

Standard thermo rules apply
Digits must increase from the bulb end of a thermometer.

Links
Try the puzzle on:

F-Puzzles
CTC-App