 Complete the following phrase:  In the Nimzo-Indian, Black is generally prepared to concede the bishop pair by playing Bxc3. As dynamic compensation, they often double Whites c-pawns, which represent a static weakness, and gains play against the central light squares d5 and e4, even in those instances where White is able to recapture with a piece after ...Bxc3. Black will aim to close the position to reduce the scope of Whites bishops. To this end, Black must blockade the white pawn centre from advancing and neutralise Whites attacking chances on the . An example of Blacks strategy carried out successfully is the game Mikhail BotvinnikSamuel Reshevsky from the 