The Spachuabish Gambit
So I just had an opponent play the following against me:
1. e4 e5 2. Nf3 a6
Alright, that's fine. There are all sorts of lines which people like and I'm not writing to question 2. ... a6. My issue came when I looked in the game explorer and noticed that 3 out of 6 of the games had the response Bb5 (the other 3 being c4).
It seems that any reasonable person playing black would not need to put much thought into their third move, as they would obviously play Nc6. Wait, what?!?! Yes, according to the chess.com game explorer, all three games had black playing 3. ... Nc6.