White has difficulties in simultaneously defending the pawn P/g5 and the knight N/d1. In other cases like 40 Qg4, White's pawn P/e4 is also weak, while White's king is vulnerable to checks. Therefore, I hoped that Black had good drawing chances. I had the following plan: after 40 Nf2 Qxg5 41 Qg4 Qxg4 42 Nxg4, Black's king quickly moves to the queenside and takes the pawn P/b5. After that, perhaps Black succeeds to sacrifice one's knight against two pawns to achieve a theoretical draw K + N vs K + 2P.
40. b6
With this move, White offered a draw that was accepted. Note that White's last move gives away the extra pawn that is also a passed pawn. If White makes such a move and offers a draw, it is a piece of solid evidence that White is sure that Black can make a draw, whatever move White makes. However, how can White know for sure that the game ends with the draw in such a complicated position? The only explanation I see is that White, who accused Black of using the chess engine in the previous move, was itself using a chess engine. Anyway, now I hesitate to play chess on Red Hot Pawn. On the Forum, I have been labelled as "racist" and "far-right" without any reason, and two of my stronger opponents who failed to win me, have sent me insulting and accusing messages.