E23Black3 book lines continue
Spielmann Variation, Stahlberg Variation
Nimzo-Indian Defense1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qb3 c5 5. dxc5 Nc6 6. Nf3 Ne4 7. Bd2 Nxc5
Also known as Nimzo-Indian: Spielmann, San Remo Variation, Nimzo-Indian Defense, Spielmann Variation, San Remo Variation, Nimzo-Indian; Stahlberg Variation.