Understanding soundness and motivations in chess puzzles, problems, and studies

What makes chess puzzles, problems, and endgame studies sound – or unsound? Why do some puzzles seem to contain “sub-optimal” moves by the opposing side? Is a problem or a study faulty if its thematic variation isn’t apparently “forced”? These sorts of questions are often raised, and it’s certainly important

Difficult Chess Puzzles for Advanced Players

PDF) Energy Consumption in the Chess WSN: A MoDeST Case Study

Why are chess puzzles so difficult? Are there any tricks to help solve them? - Quora

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2020 Archives - Page 2 of 13 - British Chess News

logical deductions - FasterCapital

Keyword:rational reasoning - FasterCapital

Am I missing something or does the following puzzle not make sense? White to play and mate. : r/chess

Chess problems vs puzzles and more on 'The Queen's Gambit' scene

I've improved my chess by being methodical, but now I timeout in winning positions (5 min blitz). How can I see strong moves faster? - Quora

chess studies – Daily Chess Musings

Are chess tactics and puzzles critical for learning chess?

Chess Puzzles Brilliant Math & Science Wiki

Part II - Good Thinking