Is the Jobava London even London?

The Queens Pawn Opening Chigorin Variation 3.Nc3 e6 4.f3 a.k.a Jobava London, is even a London system? Recently this guy @rychessmaster1 stated this system and I myself had a try to get the London achievement, by cc says it's not London :/ Here's my game though, don't mind me, it's just for the achievement, didn't really study any theory regarding this and not really a d4 player.

Different names exist for the same basic openings. The Urosov gambit is often called the Ponziani gambit. The Slav defense is technically a Queen’s Gambit Declined.

If you play d4 followed by Bf5, you have entered the accelerated London, but some people call Nc3 a part of the London, but others call it something else, especially if you change the order of the moves. If you play Nc3 first, it’s called the Dunst opening. I’m pretty sure that calling it a variation of the London System is something that has happened only in the last couple of years. Before that it was called the Jobava-Prié.

The lesson? Don’t expect there to be hard, fast rules about what openings are called.

The "Jobava London" is a misnomer.  It is the Jobava-Prie system.  As mentioned, here is how you distinguish the various Bf4 lines with no c4 (in most cases, c4 with Bf4 is going to be a slav or Blackburne QGD of some sort):

 

London - Knights are on d2 and f3

Barry - Knights are on c3 and f3 with Black Kingside Fianchetto and ...d5 (if Black plays ...d6, you are in a Pirc)

Jobava-Prie - Knight on c3, Kingside Knight is delayed.  If it does go to f3 (sometimes goes to e2 or even h3), there usually is no Fianchetto on Black's Kingside, otherwise you are likely in a Barry Attack.

Veresov - Nc3, the Kingside Knight is delayed like the Jobava-Prie, but the Bishop goes to g5 instead of f4.  The Veresov compares to the Jobava-Prie like the Torre compares to the London.

 

No, the Urusov Gambit is in the Bishop's opening, 1.e4 e4 2.Bc4 Nf6 3.d4.

The Ponziani Gambit is a piece sacrifice line by Black in the Ponziani itself.

4. f3 in that game isn’t very good....

Play Nb5 or e3

According to the opening explorer, 1. e4 e5 2. Bc4 Nf6 3. d4 is the Ponziani gambit. If exd4 then Nf3, the e4 pawn is gambited and it’s now “officially” the Urosov gambit. In internet videos, people use them interchangeably.

I was making a larger point, however, that names are used loosely. If everyone starts calling it the Jobava London, then that’s what you’ll have to get used to.

Everyone calls 1. d4 Nf6 2. c4 c5 3. d5 b5 the Benko gambit, but Benko himself didn’t. He thought that it was the Volga and only became the Benko after 4.cxb5 a6.

But nobody listened to Benko and nobody will listen to anyone about the name Jobava-Prié because Simon Williams and Eric Rosen have taken to calling it the Jobava London system, and these days that’s more important.

Sure, not really a d4 player but will have that in mind if I ever played this opening again . The only d4 thing that I know theory is the Trompowsky 

@rychessmaster1 or @ricechessmaster1 ? 

But jobava can be reached via 2. Bf4

To my knowledge the only reason not to play 2. Bf4 is that it allows 2.. b6 and 3. Nc3 Bb7 prevents any sort of good setup 

Also there is 2... c5 3. e3 Qb6 4. Nc3 Qxb2(also 4.. cxd4) which is usually a forced draw

on the other hand though, 2. Bf4 is often met with by e6 or g6, after which 3. Nc3 and you can force black to play a specific variation of the jobava 

Bd6 where?

Good

What is the best London system from a practical standpoint? 

not sure but it's definitely a viable opening, also 4.f3 is not the only move there, I have seen other moves like e3 and Qd2 as well

That is the essential point.  To continue to debate the Jobava-Prie-London naming convention is pointless.  Just as debating the name of the Benko Gambit as the Volga Gambit has been rendered pointless.  Like it or not, continuing this debate is akin to howling at the moon...

Introduction To The London System & Jobava London System...

https://www.chess.com/blog/RussBell/the-london-system

And is the Jobava London considered to be an aggressive opening for white?

 

Yes

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