The best engine you can challenge online

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Kielinkei

I'm wondering what is the strongest engine you can play against on the internet. It'd be great if I could get the engine play moves against me without showing other lines or evaluation. A takeback option would also be appreciated since that way the engine could show me its ideas against many possible replies in the opening and early middlegame. E.g. the chess.com and lichess max-level bots are quite weak compared to Stockfish. 

InvyGD
Stockfish for sure, figuring out how to get it the way you want I simply can’t give an exact answer.