Obviously he didn't cheat in every game, just look at his rating. So trust lichess, he did it in some games. As far as I know cheater detection is very good here. As for your game: Every human would take the queen, but he threatens mate, it seems to me that you cannot. The biggest tips & tricks library, search for hack and cheat codes for top mobile games and apps. About lichess. Free Online Chess. Built for the love of chess, this application is begin source and free for all. 150 000 individual users everyday and growing fast. Play bullet, blitz, classical, and correspondence chess - Play in arena.
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So, once again - even if in general a 'smart' cheater plays almost indistinguishable from a grandmaster, he still can be caught in trifles, like instantly made brilliant sacrifices or perfectly calculated (with 10 seconds left on the clock in a bullet game) long mating combinations. Check your games with the chess engine on analysis board, for example at lichess (you can load FEN of the specific position or PGN of the whole game there). We also have our own online calculator here. It is recommended to enable 'multipv' option - this will show multiple lines (variations), suggested by the engine. It's important because smart cheater can play second or third best move in order to decrease overall strength of playing and achieve more human-like style through that. And don't forget always to check suspicious games for number of mistakes and blunders. If there are zero mistakes in 100 moves game, it is very strange. Take a look at screenshot below: DrNykterstein is Magnus Carlsen. As you can see even champions make mistakes.
