theoretical just means idea. novelty just means new. new idea. although in this case, it seems to waste a tempo, misplace the bishop, and still only threaten what Bb5 would have done to begin with.
How come this is a 'Theoretical Novelty"?

theoretical just means idea. novelty just means new. new idea. although in this case, it seems to waste a tempo, misplace the bishop, and still only threaten what Bb5 would have done to begin with.
There.
Modified it.

theoretical just means idea. novelty just means new. new idea. although in this case, it seems to waste a tempo, misplace the bishop, and still only threaten what Bb5 would have done to begin with.
What should Black play there then. After, White's 3 Bb5?

I would guess Nf6 attacking the e4 pawn. white has transposed into a Ruy Lopez a tempo down with no Nf3.

"3...d5 or 3...Nd4 are both more than adequate"
d5 allows for a doubling of pawns attack. And after 3...Nd4, White can move 4 Bc4 and have an advantage.

3...Nf3 is fine too
That's probably even worse than 3...d5, as it makes doubled paws for Black, with no compensation.

I thought you guys were deliberately acting stupid and ignorant and even lying in Math.
Now I see you are that bad in Chess as well.

3..., Nf6 is perfectly playable. white doesn't want to play 4. Bxc6,... before he plays Nf3. Black responds 4.Bxc6, dxc6 and is fine. go study the exchange variation of the Ruy Lopez. with Bc4 and Bb5 by white he has crossed two different lines. one in the Bishops opening and one in the Ruy Lopez.

3..., Nf6 is perfectly playable. white doesn't want to play 4. Bxc6,... before he plays Nf3. Black responds 4.Bxc6, dxc6 and is fine. go study the exchange variation of the Ruy Lopez. with Bc4 and Bb5 by white he has crossed two different lines. one in the Bishops opening and one in the Ruy Lopez.
Not convincing at all.
Why not BxN?

It's because 2...Nc6 to White's 2 Bc4, us quite an obnoxious move

#15, go study the exchange variation of the Ruy Lopez. it should answer all your questions. the base problem of this suggested position is white has mixed a line of the Bishops opening with the Ruy Lopez.

The Morphy Defense
3...a6 Forces White to move his Bishop twice in a row as well.
So what is your point?
With my 'Theoretical Novelty' it is a choice, if White's.

#18, yes, 3...,a6 would force white to move the bishop twice if he doesn't take on c6. if you go study the mainline variation of the Ruy Lopez , technically it moves three times. white wants the light squared bishop on c2 bearing down on blacks castled king side.

3 Bd5 technically does not waste a tempo.
For less development after 4 BxN it's worth it for it leaves Black with doubled pawns, and an inferior position.
https://www.chess.com/explorer?moveList=e4+e5+Bc4+Nc6&ply=4
3) Bd5 or Bb5