4

The variation beginning 4.e3 Bxc3+ is not popular, but it is better than its reputation, and it's a very efficient way of cutting out a lot of theory if you're just taking up the Nimzo-Indian as Black. It hasn't been tried and found wanting; it just hasn't been tried (very much). Essentially, Black would like to set up a darksquare pawn structure and would ...


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