How should black play against this system?

I believe this is called the London system

Because I almost exclusively play Nf6 against d4, white's absolute control of e5 becomes a problem because it makes it difficult to make a e4 pawn push....

The London really isn't as good compared to 2.c4...(Yea yea yea I know some ppl are going to say Kamsky uses it blah blah blah but hes Kamsky and he plays stuff like the Ruy too so...)

Just go ahead and play 4...d6, 5...0-0 or 4...0-0 5...d6, it don't think it really matters. The KID setup is effective against the London btw. I guess you could play Nbd7 , but Im clinging towards Nc6 for some reason lol (maybe to route to the kingside I guess with Ne7). Aim for the e5 and f5 pushes I would say.

Don't forget, that with the absence of white's dark squared bishop on c1, a1-h8 diagonal gets weak and you might be able to plan an eventualy Nh5 to kick white's dark square bishop from defending e5, and then follow with a quick f5 after e5 (assuming white plays d5 in response to e5).

This is just my intuitive thought about the middlegame positions and I haven't really done any extensive analysis though so there might be something wrong with this line of thought and feel free to point it out :)

I like it. Unfortunately in the past the e pawn is on e3 for white which gives white's queen access to h5 which prevents Nh5.... 

The pawn @ g6 protects the Nh5 :P...the only thing would be if white plays Be2 though, but his Nf3 is in the way...

But what you mention can lead to an interesting, but not dangerous, tactic which alters the position- I doubt your usual London passive player would bother with it though...

Okay now i believe you :)

With this set up against the London System, play for e5 with Bg7 d6 Nc6 Nf7->d7 and e5

I won't have disdain for it once I figure out how to destroy it! I've taken a liking to the grunfeld and dragon (and maybe even put my caro-kann in this category) because they offer black great attacking options as soon as white is done with his initial thrust.

I think I don't like the London because white doesn't give me any pieces to attack, at least not in the same way that I'm used to it. 

Hehe I hate pretty much all 1.d4 w/o 2.c4 (or  2.Nf3 3.c4, with the exception of delaying c4 against the Dutch-and I can understand someone picking like 2.Nc3 or 2.Bg5 against it though)

I just feel that the London isn't ambitious like 2.c4 and that it is practically a must for white to go for an advantage all the time-even if white wants a draw, play drawish lines within 2.c4.

I always thought that this was played by old duffers and that the antidote is d5; e6; Bd6.

The problem is I don't know they're playing the london and I play Nf6 against d4 for all of my openings.

@lavaRook #10:

Agreed.

You can always start with Nf6 & e6 then after Bf4 go for the d5/Bd6 manouver. The main problem from your initial question is the move order that has 2...g6, which is commital but not bad. I would not give up on control of some sort on e5, maybe with d6/Nbd7.

I see a common thread running through all the posts, you all hate the London, but haven't really studied a response. I humbly suggest a rigorous opening study database or text (no matter how distasteful it is). 

1.D4 Nf6  2.C4 is not good because when played, you give black an equal chance of winning.

i personally would open up with 1.C4 firs as it can lead to 7 different types of games.

Um...no that is false on many levels:

If what you said was even remotely true, then the queens gambit/2.c4 would pretty much never be played AT ALL. Yet its the most popular move and 1.d4 > 1.c4 in popularity...

So what if 1.c4 has a lot of trnapositional potential...that doesn't mean anything for winning chances. Not to mention, white always scores higher than Black in 2.c4 based on statistics..

The point is to play openings with less chances of draw.. That's why it's not about playing what is "popular", but to play an opening that your oponent is not familiar with, giving you higher chances of winning. That's why in my opinion 1.C4 is better.

Even though this forum topic was hijacked from the London, I still want to chip in on this c4 vs d4 debate. c4 is worse because it lets black decide the opening... I guess the only advantage might be black's lack of preparedness, but the statistics come from a higher level and really make them irrelevant for our level of play.... so remove those from the debate 

White scores 56-57% with 2.c4 based on your database which is pretty good. Also, how are people less familiar with 1.c4? It is a mainline first move too along with 1.Nf3 and not something like 1.b4...

And the draw percentage given in that database up to move 2 can be decieving though as White can choose drawish lines (e.g. Exchange Slav) and that takes into account ~10,000 games which isn't too many

Based on chess.com database after 1.d4 Nf6 2.c4 e6: