This puzzle is rated 4000 on chess.com and has a 100% fail rate

FIDE introduces the Gender Equality in Chess Index (GECI) : r/chess

2400-->3400 rated puzzle with a 0% pass rate - Chess Forums

From 1400 to 2000 in Blitz on Chess.com - A 10½ Year Journey

Does number of chess puzzles solved influence average player rating after controlling for total hours played? A critical two-factor analysis based on data from lichess.org (statistical analysis - part 6) : r/chess

Ok, what the heck? Puzzle ratings are out of control - Chess Forums - Chess. com

Kids creation International Business Game with Folding Board Game Set for Kids and Adults,Game for Time Pass Party & Fun Games Board Game - International Business Game with Folding Board Game Set

This puzzle is rated 4000 on chess.com and has a 100% fail rate. Black to play and win. Can you solve it? : r/chess

Rated 1827, pass rate 68% : r/chess

Solid Brass Proportional Divider (Set of 5) with 8″ Rosewood Wooden Storage Box, Mathematical Marine Navigational Survey Instruments

Puzzles with very low pass rates now appearing often - Chess Forums - Chess. com