nimzo indian vs 4.a3


In the way I played I thought the c4 pawn isn't going anywhere anyways because I have a lock on the c5 square. I was playing on the e4 square and better centre control and I could probably pick the c4 pawn eventually If it came down to it. If white wants to fight for control of the e4 square he probably has to play f3 and weaken his kings side more and now he has two weaknesses. If he doesn't force my knight away I thought my kingside attack would be strong enough that he wouldn't be able to do much else except defend. I think how I played was a bit double edged.

I didn't think about Ne4 so fast. I wanted to prepare a bit more because of the potential trade of pieces with an potentially awkward pawn on e4. That was a pretty beautiful game blueemu. Thanks for the help Bobby!

Actually White's decision to play a3 and then treat the position as a Rubenstein was also rather suspect.
Why play a3 early when you can force Black's Bxc3 just by castling in the Rubenstein?

Yes, it's a well-known line, where white has unnecessarily played a3, giving BxN for free. (There is a game of Alekhine's in his first best games book, that gives the ideas, amongst many others).
Was going to say same about the OP's game, but there both sides make early mistakes. White plays Nf3, not allowing quick f3, and e4. Black doesn't attack c4, with Ba6, and castles which restricts counterplay. In the position after Bg5, without king-side castling, d6, e5 followed by Qe7 and queenside castling would be a typical plan. Sometimes, including h6, g5.