Rated 'mate in 4' chess puzzles

14 Chess Puzzles for Intermediate Players –

500 Chess Puzzles, Mate in 2, Beginner & Intermediate Level: Solve chess problems and improve your tactical chess skills (I'm progressing in Chess)

Record-breaking Chess Puzzles

Checkmate in 6-9 Moves : A collection of 444 chess puzzles with solutions

Don't Checkmate In One, Solve This If You Are a Genius

Satisfying Chess Puzzle. Can you find the crushing move for Black

chess - An Easy Mate In 1 - Puzzling Stack Exchange

1000 Mate In One, Chess Puzzles: Unique Mate In 1 Chess Puzzles With Solutions: Martin, Josh Ortiz: 9798356431791: : Books

Anastasia's Mate –

10 Reasons To Start Solving Chess Puzzles Today, by Charles Davie, Getting Into Chess