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Each row or column contains skyscrapers of different height (from 1 to n); numbers outside the grid indicate how many skyscrapers are visible from that direction.



  • With empty fields: Additionally to the skyscrapers in every row and every column an empty field exists.
  • At the borders the sum of the visible skyscrapers is given.
  • At the borders the products of the visible skyscrapers is given.
  • Crypto version: The numbers at the borders are replaced with letters.
  • Sudoku-Skyscraper: Additionally to the Skyscraperrules there are 3x3-areas like Sudoku.
  • As easy as ABC: Beside the skyscrapers every field has an assoziated letter, in a way that alle given combinations appear exactly once.