The hardest mate in 1 puzzle I've seen! (White to move, mate in 1

White to Move and NOT Mate in 1

One of the hardest/trickiest Checkmate in 1 puzzle

The hardest mate in 1 puzzle I've seen! (White to move, mate in one) : r/AnarchyChess

Coded Message chess puzzle. - Chess Forums

What is the hardest mate-in-2 puzzle? - Quora

John Nunn's Chess Puzzle Book by Nunn, John

The hardest mate in 1 puzzle I've seen! (White to move, mate in 1) : r/AnarchyChess

What is the hardest mate-in-3 puzzle? - Quora

Mate in 1 Chess Puzzles - HubPages

Mate in 4 Chess Puzzle 1 - Brain Easer