Logic Masters Deutschland e.V.

This is my first time setting a puzzle. I'd love to hear what people think!

Standard sudoku rules apply to the central 9x9 cells, i.e., cells must be filled with the digits 1-9 so that the no row, column, or indicated 3x3 region has a repeated digit.

Cells outside the 9x9 which have marks on them must also contain digits 1-9.

Sandwiches:

The exterior digits in cages are sandwich clues: reading left-to-right (rows) or top-to-bottom (columns) they indicate the sum of the digits between 1 and 9 in the corresponding row or column.

Skyscraper:

The remaining exterior digits are skyscraper clues. They indicate how many cells can be 'seen' from that direction (i.e., when traversing the row/column from that direction how many cells contain digits larger than all of the preceding cells).

Thermometers:

Digits on thermometers must increase from bulb to tip.

Renban:

Digits on a line must be a set of distinct consecutive numbers, but may be in any order.