Chess Online

3...Nf2 could have been a variation because a 3,4 or 5 move could have been achieved.

But at the same time the whole pattern is not that typical, every move has to be calculated. Looking at it now, I wonder why I only moved the white rook a6 to a5 (to avoid having to input messy Rxg6+ lines), and not the h6 pawn to h7 in order to have only one variation after Rg8+ Kg7 Ne6+ Kf6(!); but asking this question simultaneously answers it: then Ne6+ Kh6 would be possible as an alternative route, too, so it wouldn't matter that much. This way is closest to the original setup.