Game of the Day!, Game of the Day!, By Chess ON

I got this terrible puzzle as 2nd puzzle in survival. In no world is finding the best move sub 200 elo. : r/chess

My second composed puzzle. White to play and mate in 3 : r/chess

Mate in 2 Puzzle : r/chess

Attributions, anticipations, and plagiarism in chess compositions

Chess puzzle I got from chess.com : r/chess

Reddit - Dive into anything

This was rated as a 2800 level puzzle on chess.com, but isn't the move a little too obvious to be a grandmaster level puzzle? Am I missing something? : r/chess

Crazy 3000 rated puzzle! Find the continuation that results in

Plastic Folding 20” Chess Board And Black And White Medieval Chess

Lichess puzzle ratings are completely puzzling. For example this is rated 1813. I would expect a complete novice to solve this. Whereas I've seen mate in 6 with brilliant moves being rated