The odd opening position

Perhaps Benoni: Taimanov?

X must be sum philidor centre surrender variation

 Yes!

 Look for an obscure-ish variation of a very popular opening...

V is dutch laningrad maybe

 Correct!

I: KID, some line in the Saemisch attack

IV: The structure reminds me of the Latvian Gambit, but Black is doing too well, so it can't be that...

IX: Some sort of Kalashnikov

X: Hmm... Cozio Defense?

XI: Almost certainly some variation of the King's Gambit, but I don't really know...

 KID Saemisch and Cozio are correct!

BTW, XI is indeed a King's Gambit... But which variation?

Could IV be some sort of Alekhine's?

 No, very popular opening, not so popular variation...

IX is a Symetrical English?

IV cud be hungarian def, giouco pianisimo

XI, IX and IV still unsolved.

i know IV starts as e4 e5 nf3 nc6 bc4 f5 i dont remember the name

 Close enough, Ruy Lopez:Schliemann is the answer! I assume you meant Bb5.

My Schlieman's don't look like that : 0...

yea scheilman's bb5 but then wat about the g8 knight and the rook in it's place?

 After ...c6 white retreated the bishop to c4 and later on this bishop captured the black knight on g8. Black recaptured with the rook.

aww so close