Looking for free online chess engines that have (roughly) known

In short, I am looking for an online free chess engine that has either: a.) multiple engines with multiple ratings, some as low as 1500-1600, and some as high as 2200 or better, or b.) is a single

Why is Stockfish willing to give up the queen? I played the lines later and it seems that I can save it without having a worse outcome. : r/chess

Chess Analysis Board Online Free and puzzles

Why doesn't the chess engine see c4 here? : r/chess

Top Chess Engines to Use in 2023

Best Free Chess Engines Every Chess Player Should Download - HobbyLark

Chess Investigation Finds That U.S. Grandmaster 'Likely Cheated' More Than 100 Times - WSJ

Millennium eONE Electronic Chess Board

How is this possibly the best move? : r/chess

Hans Niemann probably cheated in more than 100 chess games, investigation finds, Chess

9 Toughest Chess Engines You Can Play Against - Geekflare