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
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