Nimzo-Indian Defense: Classical Variation
Variations
Nimzo-Indian Defense: Classical Variation, Berlin Variation
O-O 5. e3 d5 6. Nf3 c5
Nimzo-Indian Defense: Classical Variation, Keres Defense
O-O 5. a3 Bxc3+ 6. Qxc3 b6
Nimzo-Indian Defense: Classical Variation, Vitolins-Adorjan Gambit
O-O 5. a3 Bxc3+ 6. Qxc3 b5