Case: Silhouette
Clue of 1
When we have a clue of , we know the tallest skyscraper must lie immediately in front of that clue.
| 1 | ||||||
| 5 | ||||||
| 5 | 1 | |||||
Since we can only see 1 skyscraper, it has to be the tallest one blocking all the rest. If it were anything else, we’d be able to see the tallest skyscraper behind it as well.
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This is usually the first kind of deduction you make at the start of skyscrapers, when locating the skyscrapers.