This Mate in 2 Puzzle Forced FIDE to Change the Rules of Chess 😱 - YouTube
International Chess Federation on Twitter: "White to move and mate in two. 🧩 This problem composed by John Griswold White was published in "Canadian Illustrated News" in 1879. John G. White (1845-1928)
What is the hardest mate-in-2 puzzle? - Quora
The Chess Files: Mate in 2, 3 or 4? – The U.S. Chess Trust
Chess Tactics: Study 1 - Mate in 2 - TheChessWorld
Mate in 2 chess puzzles – Solve Chess Problems Mate in 2 Moves