yes but if white plans to play e4 then bxc3 is better than Qxc3. Firstly white has the d-pawn protected,secondly he has a central pawn mass,thirdly white's queen supports e4.

weak move. in the nimzo-indian you wanna play c5,that is a part of the main line.

no. He may want to play e5 instead,opening up his light squared bihop and his dark squared bishop is now outside the pawn chain. in my point of view 5. ... d6 looks solid at the moment.

now that white has such a strong grip on d5 my previous comment about e5 is allowed. 7. ... h6 was tempo wasting probably. white has a beautiful central pawn mass which black needs to fight.

d5 was probably bad. black has less controll over the c5 and e5 squares.

this move does weaken white's c1 bishop but in my experience,the c1 bishop always gets badly placed in queens pawn game.

you are execluding the fact that if Rg8 black gets a strong g-file to compensate for the pawns. a rather interesting position. now if only black could castle on the queen-side i'd imagine black gets a strong king-side-attack

the ''queenside expansion'' isn't critical at all. More importanly,this move allows white's bishop to get in the game.

hmmmm....resonable....