On the topic of puzzle rules, I would like to revisit this amazing puzzle problem, that deals with the somewhat ambiguous nature of puzzles! White to move and mate in 2 :
Idiot Chess Puzzles - Chess Forums - Chess.com
The Myth About Chess Tactics and Solving Chess Puzzles
500 Chess Puzzles, Mate in 1, Beginner Level: Solve chess problems and improve your tactical chess skills (I'm progressing in Chess): Akt, Chess: 9798729228126: Amazon.com: Books
Chess Puzzles - KIDS UNLIMITED
Puzzle & Chess for Nintendo Switch - Nintendo Official Site