E49 - Nimzo-Indian: 4.e3 O-O 5.Bd3 d5 6.a3

Variation: Nimzo-Indian: 4.e3 O-O 5.Bd3 d5 6.a3

Initial Move: The final theoretical extension of the 4.e3 Nimzo-Indian. It represents a total mastery of classical development and central control. Learn this opening step by step