Ruy Lopez, lines with d3.

b5 followed by Be7 and short castle. Afterwards just d5 with equality, but I prefer black.

White will delay castling and will play Nd2-f1. 

Korchnoi played this line

White may play Nc3

how are you every going to achieve d5?

with black...

Okay: play as black from this position:

castle followed by d5

Qe2

maybe d5 is possible already. I know the e5 pawn is hanging but very often black gets a better version of the Marshall attack.

I don't like 4.d3 because it keeps queens on the board.  Here's my personal database of 4.d3 in the Berlin:

What nonsense???????

NONE of your moves are correct according to my database.

The mainline of the training database is from a Svidler game:

Nielsen's move Nd4 is not the main line. Anyway, after Bg5 and Nd5, white is fine.