Lichess puzzle ratings are completely puzzling. For example this

Chess Puzzles from the Games of Bobby Fischer

The 0-1000 rated puzzles on chess.com have been training me for

Mate in 2 Puzzle : r/chess

Gautam chess

Wanna checkmate your friends, solve puzzles, and watch top events

Interesting Mate in 3 Puzzle! White to move and rekt Black : r/chess

Board Vision Puzzle: How many Checkmates are there? : ChessPuzzles

Chess: 5334 Problems, Combinations and Games: Polgár, László, Pandolfini, Bruce: 9781579125547: : Books

Niche use for it, but I set up the chess puzzle on chess.com if it's easier for some players to study : r/BG3

A neat puzzle from Laszlo Polgar's Chess: 5334 Problems, Combinations, and Games. White to move, and show your logic as well as your tactical skill. : r/chess