Ruy Lopez Nurnberg Variation (1.e4 e5 2.Nf3 Nc6 3.Bb5 f6 / 1.e4 e5 2.Nf3 Nc6) Chess Puzzles

I don’t have enough reliable, specific documentation to state the exact defining move order for the “Ruy Lopez Nurnberg Variation” with confidence. In practice, this label is used for a particular Ruy Lopez sideline, but the precise transposition/critical moves that distinguish it from close siblings aren’t consistently standardized across sources. If you share the move list you’re using (or a Lichess study/link), I can identify the exact defining move(s) and explain the resulting plans precisely.