Logic Masters Deutschland e.V.

glum_hippo said that the world needed more "First Hidden Skyscraper" puzzles besides these - so you can blame this one on him.

• First Hidden Skyscraper (full odd) by Feadoor
• Elevator Action by glum_hippo

The Rules:

1. [Sudoku] Normal sudoku rules apply - fill every row, column and 3x3 box with the digits from 1 to 9 once each.
2. Clues outside the grid must be deduced, and they are simultaneously a sandwich and 'first hidden skyscraper' clue:
   • [Sandwich]: The sum of the digits in the cells between the 1 and 9 in that row or column
   • [First Hidden Skyscraper]: The numbers in the grid represent the heights of skyscrapers. A clue on the outside represents the first skyscraper that cannot be seen from that direction, where taller skyscrapers hide the view of shorter ones.
     For example, in the row 314592687, on the left hand side, the 1 is the first skyscraper that cannot be seen, hidden by the 3. On the right, the clue would be 6.

The Puzzle:

Play it on Sven's Sudokupad