Promote to Knight Chess Puzzle - SparkChess

There are cases where an underpromotion would be useful. Here's a position in which White is in trouble, that not even a promotion to Queen would solve.

What is the name of the chess puzzle that requires a white pawn to

Recently grabbed a tactics book. This was in the easy section

The Cunning Cavalry of Chess - SparkChess

Promotion (chess) - Wikipedia

Spicy Chess - Product Information, Latest Updates, and Reviews

Promote to Knight Chess Puzzle - SparkChess

Family Day Chess - SparkChess

The Cunning Cavalry of Chess - SparkChess

Robert Thacker vs. Bobby Fischer Chess Puzzle - SparkChess