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.

Promotion (chess) - Wikipedia

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Promote to Knight Chess Puzzle - SparkChess

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

Robert Thacker vs. Bobby Fischer Chess Puzzle - SparkChess

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An Amazing Knight Sac to Promote a Pawn in a 2900 rated puzzle

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