Normal 4x4 Sudoku: Place the digits 1-4 exactly once in every row, column, and 2x2 box.
Skyscrapers: Digits in the grid represent skyscrapers, with their values corresponding to their heights. Taller skyscrapers obscure all shorter skyscrapers behind them. Clues outside the grid indicate the number of skyscrapers that can be seen in that row/column, from the line of sight of the clue.
Clones: Gray cells contain exactly the same digit.
*** Solution checker includes the gray cells outside the grid.
Solve online at this SudokuPad link.
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Solution code: Row 4
on 6. November 2025, 11:38 by Aronana
awe man took me ages!
on 16. October 2025, 02:50 by SanFranSam
I thought it was a good introduction to skyscrapers. Can't get too confused with only four numbers. ;)
on 15. October 2025, 17:33 by Myfyr MJ
Very nice, interesting logic. Thank you.
on 15. October 2025, 13:58 by Will Power
Very nice logic. Thank you. -Will Power