Logic Masters Deutschland e.V.

Originally published as part of Sudokuvania: Digits of Despair.

Rules:

Sudoku - place digits from 1-9 into each cell without repeating in a row, column, or 3x3 box.

Skyscraper - digits outside the grid are skyscraper clues, and indicate the number of cells in the adjacent row or column seen by the clue. Digits seen by the clue block sight of any subsequent smaller digits in the row/column.

Arrows - digits on an arrow sum to the digit in the attached circle.

Kropki - black dots separate digits where one is double the other (not all such relationships are marked).

Play the puzzle on Sudokupad

I hope you enjoy the puzzle! :-)