The Skyscraper technique is an advanced Sudoku solving strategy that helps you eliminate candidates in certain complex scenarios. It involves identifying two cells in different rows or columns that can "see" each other, and have the same two candidates.
How to Identify a Skyscraper
A Skyscraper pattern consists of the following characteristics:
Two cells with the same two candidate numbers (X and Y).
The two cells must be in different rows or columns.
The two cells must "see" each other, meaning they are in the same block, row, or column.
How the Skyscraper Technique Works
If the above conditions are met, you can eliminate the candidate number from any cell that is seen by both of the skyscraper's "tops" (the two cells containing the candidates).
Example of the Skyscraper Technique
Tips for Spotting Skyscrapers
Look for cells with only two candidates.
Focus on cells that are in different rows or columns.
