A Retrograde Analysis Puzzle- description and story in comments : r/chess

The chess mysteries of Sherlock Holmes : 50 tantalizing problems of chess detection : Smullyan, Raymond M : Free Download, Borrow, and Streaming : Internet Archive

Masterworks of Retro Analysis

Retro chess — simply entertaining

Retrograde Analysis Chess Puzzles - Look Into the Past!

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All Blog – Chess House

What is a chess puzzle? - Quora

Retrograde Analysis Presentation

Masterworks of Retro Analysis

Chess Mysteries of Sherlock Holmes: Fifty Tantalizing Problems of Chess Detection by Raymond M. Smullyan

Chess Puzzles - Retrograde Analysis - Introduction