Playing a lot of blitz online, from time to time I meet quite strong players who regularly use very dubious lines that can have some shock or practical value in blitz or bullet chess, such as these, as White:
[FEN ""] 1.e4 e5 2.Bc4 Nf6 3.Bxf7+
Or, as Black:
[FEN ""] 1.e4 e5 2.Nf3 Bc5 3.Nxe5 Nc6
[FEN ""] 1.e4 e5 2.Nf3 d6 3.d4 Bg4 4.dxe5 d6
[FEN ""] 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qe6+ with Qg6 and an early Nc6-b4 attack
I was wondering if all of this means that some players have their private analysis of some (objectively bad) lines for use in speed chess.
Are you aware of other similar lines? As you can see, I don't mean Grob's Gambit or Cochrane's Gambit, but the very bad lines...