Hardest Mate in 2 puzzle - Chess Forums - Chess.com
What is the hardest mate-in-2 puzzle? - Quora
Checkmate in Two Puzzles Test (Very Hard) - Chess.com
Champions Chess Tour on Twitter: ".@DavidHowellGM said this is the most difficult mate in two he had ever seen... then he solved it in like 20 seconds. Can you solve the checkmate
Chess Tactics: Study 2 - Mate in 2 - TheChessWorld