Glossary

(Unofficial) skyscraping jargon

Closed

In contrast to an Open Skyscrapers, a closed Skyscrapers has clues along every lane, such that it’s ‘closed off’.


	2	2	3	3	1
2						1
2						2
1						4
4						2
3						3
	2	3	1	2	4

With the maximum number of clues available, these Skyscrapers tend to require more work than thought, and aren’t particularly fun.

Couple

Main article: Technique: Couple

Pencil marks in 2 cells in a lane, which contain the same pair of digits.



		1
		2
		34
		34
3	4	5	12	12

Lane

A general term for either a row or column; any line of digits in the puzzle grid.

Open

In contrast to a closed Skyscrapers, an open Skyscrapers does not have clues along every lane, but only a select few. This leaves parts of the edges of the grid ‘open’.


	1	2

2

4
3
	3	1

With fewer but impactful clues, these Skyscrapers are much more ‘directed’ and challenging.