Sudoku Skyscrapers - 200 Hard to Master Puzzles 9x9 (Volume 22) by Dart Veider (
15,98 €
By Dart Veider. Author Dart Veider. Skyscrapers consists of a square grid. The numbers along the edge of the puzzle indicate the number of buildings which you would see from that direction if there was a series of skyscrapers with heights equal the entries in that row or column.
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