[ECO code A17]
ENGLISH OPENING to NIMZO-INDIAN DEFENCE
Black transposes into the Nimzo-Indian Defence by developing his King's Bishop to pin White's QKt to its king, preventing White playing a defended 4.P-K4 for centre control and seeking to impose doubled pawns on White. He also enables castling. B-Alt.
White Black Transp.White Black 1. P-QB4 Kt-KB3 (1. P-Q4 Kt-KB3) 2. Kt-QB3 P-K3 (2. P-QB4 P-K3 ) 3. P-Q4 B-Kt5 (3. Kt-QB3 B-Kt5 )
Continue: or Undo or Jump or Clear