Theme: Middle Numbers (Originally for the 2015 Polish Puzzle Championship Online Qualifier)
Author/Opus: This is the 29th puzzle from our contributing puzzlemaster Tom Collyer.
Rules: Standard Skyscrapers rules.
Answer String: Enter the 2nd row from left to right, followed by a comma, followed by the 6th row from left to right.
Time Standards (highlight to view): Grandmaster = 9:00, Master = 18:00, Expert = 36:00