[Retros] Raymond Smullyan

[andrew buchanan]

Dear retro friends,
I have received second-hand information that the logician and musician Raymond Smullyan passed away peacefully last night after a stroke.
Amongst many other books of logic puzzles, he was the author of the very well-written "Chess Mysteries of Sherlock Holmes", which remains the most common way for most chess players to have encountered chess retrograde analysis.
All the best,
Andrew
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