[Taek]

Elsewhere in the thread he revealed that he achieved these results around the year 2015, which means we was playing against Stockfish 6 or earlier, estimated to have about 400 less ELO than today's Stockfish 18. Stockfish 6 didn't even have NNUE, so the real issue seems to be that he thinks his results from 2015 hold any relevance to the chess engines of today.

[galkk]

Quick search shows elo of stockfish 6=3278 (1 cpu).

To assume that a human can beat that is just delusional.

[Taek]

No not at all! You can find plenty of videos on YouTube of humans taking down 2015-era stockfish. Usually it involves exploiting specific weaknesses in the engine, for example bringing the game to a stalled position where the game nearly reaches the 50 move rule, and then the engine makes a disadvantaged move to avoid a draw.

Especially pre-NNUE, chess engines were often not fully well-rounded, and therefore a human with specific knowledge of the chess engine's weaknesses could take it down with enough attempts.