Winning By Pinning - Chess Tactics Fundamentals - IM Valeri Lilov
File:Chess pin rook.png - Wikimedia Commons
chess fork,pin and skewer
Chess Basic Tactics
What is a pin in chess? - Chess Terms - Chess.com
Chess Tactics: The Pin - YouTube
100 “Tactical Pin” Chess Puzzles for Beginners (Rating 900-1200): 100 real-life chess tactics puzzles for beginners to make you a better player: Puzzles, Mr Chess: 9781789333497: Amazon.com: Books