And play an opening that doesn't require you to pin a knight with your bishop 🤔
what to do with an opponent which first moves are a3 and h3?

Exactly. d5, e5.
yes and than another pawn to c3 or f3 depending on the move, three pawns attack?

And play an opening that doesn't require you to pin a knight with your bishop 🤔
ok tx, i like to do so.....

I just play Nbd7 and Nf6 because you develop your pawns because you try to develop. Then if he still does nothing I play Bd7 and Be6 and castle and I will have a good centre.

My first move in this game was a5. The obvious reason......I just wanted to troll @erik
nice one many traps in this game....

Laugh in frustration of the hours you spent on your pet opening that he/she now just invalidated with such a first obscure move and just start playing chess.

Be careful though because once I played a guy on chesskid and he was like a CM and he played b5 and moves like that and crushed me from the flanks from the c fileand f file with rook

He missed 20.Qa6
You mean 20. Qxa6 right? that would leave the hanging white rook at d1...so after Qxa6, Qxd1+ which will be a dominant position for black
edit: after after Qf1 Qxf1...Kxf1 then R7f8...he will lose his knight sacrifice and rook will be saved by black

i just try this position with analysis of computer of chess.com. That is weird, after this moves and d5 e5 it goes to minus one. But when you move a piece after this it goes back. It isnt that bad?

Develop your pieces. Occupy the center. Use your space advantage to advance into your opponent's territory. Create positional weaknesses in their structure, and pounce when tactics arise.

Be careful about developing most ambitiously. You don't want to get into a sicilian Najdorf colors reversed down a tempo, do you? It's fine if they do stupid moves multiple times, but not once. If they play a3 or h3 or any other stupid looking move (except g4 or b4 maybe, which are different animals) you should always look to get simple equality by playing a london system where a tempo doesn't matter much and be satisfied with comfortable equality

Be careful about developing most ambitiously. You don't want to get into a sicilian Najdorf colors reversed down a tempo, do you? It's fine if they do stupid moves multiple times, but not once. If they play a3 or h3 or any other stupid looking move (except g4 or b4 maybe, which are different animals) you should always look to get simple equality by playing a london system where a tempo doesn't matter much and be satisfied with comfortable equality
yes and what if the person do both?
Exactly. d5, e5.