Well... but there is also the "interesting novelty" 5.a3, which was played by Savielly Tartakower 126 years ago... 
New savage lines in the Scandinavian have been discovered
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Jun 20, 2023
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#3
Even after 5.a3 N4c6 6.d5 Ne5 White overextends with the pawns. +1 for White is nothing, Stockfish doesn't understand openings. It might look uncomfortable, but Black gets comfortable positions in the middlegame after pawn breaks like c5 and e6.
You can say ". +1 for White is nothing, Stockfish doesn't understand openings." as long as you like, but the vast majority of strong players will pick White every time
SimsimusBerbar wrote:
I've been playing around with the analysis board (what were you thinking, not in chess.com). And I have made interesting discoveries in the Scandinavian defense and rassembled them in one study for everyone to see and share to the world. Here's the lichess study where I put the lines. Just to give an image about how wild it can go:
Nb4 is refuted by a3
I've been playing around with the analysis board (what were you thinking, not in chess.com). And I have made interesting discoveries in the Scandinavian defense and rassembled them in one study for everyone to see and share to the world. Here's the lichess study where I put the lines. Just to give an image about how wild it can go: