the van geet?!

I played it over a year and its a really interesting opening but I didnt find any good solutions for D5. Tried Nimzovich defence reversed, but it wasnt satisfactory. I think this is very important opening for the theorethical part of NC3 roll in the game. What you think?

1 Nc3 is a solid move, develops a knight on its natural square.
1 Nc3 d5 2 d4 transposes
1 Nc3 d5 2 e4 is good too
What was not satisfactory? What problem did you experience?

Yes, 1...d5 is the main problem of 1. Nc3. U can try the Mexican Attack / White Knights Tango 2. Nf3 :

in d5 e4 black get space and white strog knights and black can refude the knights 
and d4 is worse q pawn opening becuse of c2 pown block by the knight 
i try the veresov attack and its fine ... alittle boring for me

black look fine here

this is my best game

The van geet is a playable, unusual, but not ideal opening. You typically get cramped positions and it is quite difficult to win if black knows what they are doing.

But for one, if black plays d5 you should immediately play e4. This is the point. Do not play e3. This is even the same idea in the mexican defense. You play e6 when you can't play e5 (typically because white plays Nf3). But back to the Van geet, after e4, and then the response d4, you then move your knight to g3. If everything goes to plan, you get a nice tactical struggle. If your opponent plays h5 when possible (Nf3 has to be played first), your position is typically tough to play. 

Anyway, whenever your opponent plays h5 you should always look for h4. But I wanted to show one of the serious issues with the Van Geet if you allow ...h4.

black is very agressive here b5 is  a move here hehehe

Idk what's the problem with d5? You just play d4 and if e6 you get a French after e4. If Nf6 you have Bf4(Jobova) and Bg5(Veresov) both which are great.

Yes, but it marks a transition to the Queen's Pawn Game. Is there any sense to start with 1. Nc3 in this case ?!? 🙄

But it's one of his best options