Logic Masters Deutschland e.V.

1) Standard Sudoku rules apply:
Place the digits 1-9 into each cell of the grid. None of the rows, columns or boldly outlined 3x3 boxes contain repeated digits.

2) Standard Between Sudoku rules apply:
The digits on a line that connect two big circles (Between Lines) must lie between the two digits in the circles it connects.

3) Standard Thermo Sudoku rules apply:
Digits must increase along lines with a small circle at one end, (thermometers) starting from the circles.(bulb ends)

This is the puzzle:

You can try the puzzle here. As usual, all comments and ratings are always welcome.

Hints

1)

Color cells that are high and low. (according to 5) You will not know which color represents which until you carry the coloring to the thermometer but the coloring will help with the logic on Between Lines. To understand this approach, it is recommended that you try the puzzle linked above because it also requires this kind of coloring but it is easier to do the logic on Between Lines.

2)

The break-in uses the triangle of Between Lines. The reason that the triangle is restricted is that there is always at least one pair of linked circles that is not a high-low pair. You can use this together with the restriction on 1 and 9 in Row 1 and Column 9. After you do that, the Between Line in Box 7, the long Between Line that covers Row 1 and Column 9 and the triangle will interact.

If these hints are not helpful for the point you got stuck in, please leave a hidden comment so that I can help.

I am not a native German speaker, I just use the translations of Google Translate. Therefore, corrections on the German text are highly appreciated.