I know that symmetrical variations of some openings are good up to a certain point, after which White gets a significant advantage (like gaining a piece or even mating the opponent's king). One such example is the match below, following the Italian variation of the Four Knights Game (C50):

[Event "?"]
[Site "?"]
[Date "?"]
[Eventdate "?"]
[Round "?"]
[Result "1-0"]
[White "NN"]
[Black "NN"]
[ECO "C50"]
[WhiteElo "?"]
[BlackElo "?"]
[Plycount "27"]
[FEN "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"]

1.e4 e5 2.Nf3 Nf6 3.Nc3 Nc6 4.Bc4 Bc5 5.O-O O-O 6.d3 d6 7.Bg5 Bg4 8.Nd5 Nd4 9.Qd2 Qd7 10.Bxf6 Bxf3 11.Ne7+ Kh8 12.Bxg7+ Kxg7 13.Qg5+ Kh8 14.Qf6#
1-0

After the move 9. ..Qd7, White gains a significant advantage in which Black will have to sacrifice some pieces (even the queen in one line) or he is getting checkmated.

My question is: do you know any other example of situations like this, where White gets a significant advantage after a few moves performed in a symmetrical fashion?

• This question seems to allow a lot of trivial answers like 1.e4 e5 2.Qg4 Qg5?! 3.Qxg5. What kind of answer are you looking for? Commented Jul 22, 2019 at 13:13
• You're right, I didn't think about examples like this. I do not want to take into consideration "stupid" moves by Black such as giving the queen or a piece for nothing. I want to consider (at least almost) standard openings, from move 3/4 to move 9/10. For instance, in my example 9. ..Qd7 might seem a "natural" move for an inexperienced player, he just missed a tactic in the upcoming five moves. I hope my answer is clear. Commented Jul 22, 2019 at 13:24
• @RewanDemontay That's not exactly true because Black could play 4. ..Qe7 and all is fine for Black, he broke the symmetry for no reason. Commented Jul 23, 2019 at 15:17