Logic Masters Deutschland e.V.

Since so many people are making sudokus, I decided to make one as well! I'm not so good at making sudokus so I made a small one. Enjoy!

Normal Sudoku rules apply. Fill the grid with the digits 1 to 4 so that each row, column, box contains the digits 1 to 4 exactly once.

Each of the four sides is a different type of clue from: Skyscrapers, X-Sums, Sandwich, Little Killer. The clue types are to be determined.

Skyscrapers: Digits in the grid correspond to building heights. Buildings that are taller obstruct the sight of shorter buildings behind them. Skyscraper clues outside the grid see that many buildings in its row or column.

X-Sums: The clue gives the sum of the first X digits nearest to it in its row or column, where X is the nearest digit in its row or column.

Sandwich: The clue gives the sum of the digits between the highest and lowest digits (1 & 4) in its row or column.

Little Killer: Draw an arrow on the clue that points diagonally towards the grid. The clue then gives the sum of all digits along the diagonal. The arrow is to be determined.