E23Black12 book lines continue
Spielmann Variation, Romanovsky Gambit
Nimzo-Indian Defense1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qb3 c5 5. dxc5 Nc6
Also known as Nimzo-Indian: Spielmann, 4...c5 5.dxc5 Nc6, Nimzo-Indian Defense, Spielmann Variation, Romanovsky Gambit, Nimzo-Indian; E23.