Can You Solve These 5 'Easy' Retrograde Puzzles? - Chess.com
Bill the Lizard: Solution to A Curiously Clever Chess Puzzle
The Chess Mysteries of Sherlock Holmes: Fifty Tantalizing Problems of Chess Detection (Dover Brain Games: Math Puzzles): Smullyan, Raymond M.: 9780486482019: Amazon.com: Books
Chess 4 - Puzzle Prime
Chess Analytical Problem, R. Smullyan. Sherlock Holmes!
Can You Solve These 5 'Easy' Retrograde Puzzles? - Chess.com
The Entertainer - Scientific American
The Chess Mysteries of Sherlock Holmes (Raymond Smullyan, 1979) | Complete Disregard for Spoilers
The Chess Mysteries of the Arabian Knights: Raymond Smullyan: 9780394748696: Amazon.com: Books
Chess mysteries – I, Q.
The chess mystery, solved | Fabulous adventures in coding
The Chess Mysteries of Sherlock Holmes (Raymond Smullyan, 1979) | Complete Disregard for Spoilers
To honor the passing of the famed logician Raymond Smullyan at age 97, I present one of his many chess puzzles: True or False? No pawn has ever reached the 8th rank. :
Looking back – Christmas puzzles | ChessBase
Queen's Death - Puzzle Prime
BEST RETROGRADE PUZZLE EVER? ♖ What Is On h4? ♖ Chess Logic Puzzle ♔ Raymond Smullyan - YouTube
What is the hardest mate-in-2 puzzle? - Quora
My favorite retrograde puzzle. (Raymond Smullyan) Where's the invisible white rook? : r/chess
Chess 4 - Puzzle Prime
Retro-Corner, A Collection of Instructive Problems
What is your favorite chess puzzle? - Quora
Retro chess — simply entertaining | ChessBase
