Killer Skyscrapers
Solve online in
Apply classic sudoku rules.
Each digit within the 9x9 region represents a skyscraper of that height. Digits outside this region indicate how many buildings can be seen from that direction, where higher buildings block the view of lower buildings. The small numbers in the upper left corner of a cage indicate the sum of the digits in that cage. Within a cage all digits must be different.
[Hint: switch off 'Highlight conflicts' in the user settings!]
Sudokupad (no answer check)
Sudokupad (with answer check)
or
Penpa+.
Solution code: Row 4 (9 digits)
on 26. February 2026, 22:06 by dkfan9
very enjoyable puzzle! the conflict checker does not operate properly though, it catches some conflicts and not others. It did not catch r/c conflicts when they involved box 3 cells, and the left side "skyscraper indicator" column did conflict checking but right/top/bottom did not.
on 25. February 2026, 22:33 by Piatato
Great fun!
on 25. February 2026, 20:49 by Snookerfan
Beautiful puzzle with some really tough steps, especially one in the middle. Thanks!
on 25. February 2026, 17:41 by Franjo
Not easy peasy, but delicious. Thank you very much for creating and sharing another lovely puzzle.
on 25. February 2026, 09:11 by Statistica
Eine meiner Lieblingsvarianten. Danke :-)