1.d4 2.Bf3 3.Nc3


I would not recommend this system for White.
1 d4 Nf6 2 Bf4 e6 3 Nc3 Bb4 =
Black equalizes on move 3. Not very challenging.
If you are looking for unusual d-pawn systems with unclear theory, why not the Torre attack. 1 d4 d5 2 Nf3 Nf6 3 Bg5
Or, the Richter-Veresov: 1.d4 d5 2.Nc3 Nf6 3.Bg5
these are good. The Colle is good too. That's a d4,e3,Nf3,Bd3,00,Re1,c3and build up to d4. Good solid chess.
This thread is over 10 years old. The original poster was discussing an opening known today as the Jobava London System. My chess app ALWAYS exchanges the bishop for the knight on c3 if I challenge it with a3, which seems like a cheap formulaic trick doubling the c pawns. I can't find any recommended continuation after this. None of the analyses even consider this move. It seems like I should try to play e4, but this never works for me. Any suggestions?

I was just wondering about some irregular moves, such as these three, which leave white ready to do some damage in most cases, esp with the first few moves aiming at a fork on Black's Queen side rook and the king.
That whole idea is pointless. There are way too many good ways for Black to meet the threat. He can even just ignore it and meet it with natural developing moves, like this.

This thread is over 10 years old. The original poster was discussing an opening known today as the Jobava London System. My chess app ALWAYS exchanges the bishop for the knight on c3 if I challenge it with a3, which seems like a cheap formulaic trick doubling the c pawns. I can't find any recommended continuation after this. None of the analyses even consider this move. It seems like I should try to play e4, but this never works for me. Any suggestions?
I recommend the "normal London." Basically this:
Of course, there are many variations, but these 2 are probably the most common.
The normal London system definitely seems attractive to me if black plays an early e6. I'm still researching related openings like the Colle-Zukertort and the Trompowski.
it can end up as a london system, specifically the jobava london system. however, it only works well if black has played d5. you can still play it against other setups but it won't be so promising.
you can start with 1 d4 and after 1..d5 play 2 nc3 intending bf4 or 2 bf4 intending nc3 next. you'll find some videos and articles by simon williams about this, and some nuances if you are inclined to go further.
after 1 d4 nf6 you can still play either 2 bf4 or 2 nc3. you just have to play something else if black does not play d5 here. i think simon williams also mentions some ideas but it will be short because it is not really the main topic of his videos and articles. still useful though.
against other first moves besides 1 d5 and 1 nf6 you have to do your own digging. a simple principled approach is to occupy the center with 2 pawns (d4 e4) if the opponent doesn't stop you, and then keep developing pieces and make sure you protect those center pawns, until you get your king to safety, get the rooks into the game, and by then you should be able to start some attack or territorial expansion.