Logic Masters Deutschland e.V.

Normal sudoku rules apply. Digits may not repeat within cages and must sum to the given value, if present.

The cages with given sums form a line, starting at the grey square. If the value of a cage is given, either the tens digit gives the amount of skyscrapers seen along this line and the ones digit the amount of parity switches, or the other way around. This assignment can differ between cages!

A valid cage (two skyscrapers seen, one parity switch, sums to 21):


For those unfamiliar with the skyscraper rule:
Each number n represents a skyscraper of height n. Imagine someone looking down a column or row. Taller skyscrapers block shorter ones behind them from view. A skyscraper clue indicates the number of skyscrapers our observer can see from that direction.
f-puzzles link here.