Is 1. Nf3 Nf6 2. c4 e6 3. g3 b6 a QID even though White hasn't played d4 yet? What would you recommend me against it? I first thought that starting with 1. Nf3 would avoid the QID. But after thinking about it, this is only true if White plays 1. Nf3 Nf6 2. c4 e6 3. Nc3

The move 3. Nc3 seems really cool since this would probably get out of book most people who play the Nimzo/QID complex (at least at the club level).

Though 3. g3 is also very interesting. But after 1. Nf3 Nf6 2. c4 e6 3. g3 Black has 3... b6

And then we have a position that is very close to a QID, but there is one difference: White didn't play d4 yet.

Does this make a real important difference? Or is this position also considered as a QID? Will White need to play d4 later anyway, and thus transposing to a normal QID?

After 1. Nf3 Nf6 2. c4 e6 3. g3 b6 4. Bg2 Bb7 5. O-O what would you recommend me to play?

After 5...Be7 there are three possible moves:


6.Nc3
6.d4
6.b3


What are all the differences between these three moves?

And finally, what do you think about Wojo's 6. Nc3 O-O 7. Re1 ?
Does this make a real important difference? Or is this position also considered as a QID?


This is definitely not QID, as White hasn't played d4 yet. This is a major difference, that is good for White. Black needs to prevent e4 in the QID and he succeeds in it, but here White has an extra "warrior" for fight for the e4, the d-pawn. If White could get e4 then Black position could become difficult.


  Will White need to play d4 later anyway, and thus transposing to a normal QID?


No, You have a choice: you can "forgive" him for being too hasty ( play d4 and enter standard QID ) or you can try and punish him ( by fighting for e4 ).


  After 1. Nf3 Nf6 2. c4 e6 3. g3 b6 4. Bg2 Bb7 5. O-O what would you recommend me to play?


I would follow the line Kramnik gave in book Khalifman-Opening for White According to Kramnik 1.Nf3 ( 2nd book, 2001 ) and go for Nc3 so I could fight for e4.


  What are all the differences between these three moves?


With d4 you go for the QID ( not bad ), with b3 you go for Reti-like-position and with Nc3 you try to refute Black's play.


  And finally, what do you think about Wojo's 6. Nc3 O-O 7. Re1 ?


This is the plan I would choose in the game ( Kramnik suggested it as well! ). It tries to refute Black's opening play by claiming e4 -> it is the strongest plan in my opinion.