Logic Masters Deutschland e.V.

Normal Sudoku rules apply.
Digits on Thermos increase from the bulb to the end.
The sum of the digits of each arrow is denoted in the two-cell circle.
Digits on each arrow do not repeat.
Any two same digits on arrows that are not the first digit (as read from the center to the arrow heads), will share the same preceeding digit. (e.g. if a 2 on one arrow is preceeded by a 1, a 2 on any other arrow will also have a 1 before it)
The six digit numbers of the arrows (as read from the center to the arrow heads), share a six-digit common denominator. (e.g. 222222 and 333333 can be divided by 111111 and thus share a 6-digit common denominator)

Sudokupad