ECO E42 · Nimzo-Indian Defense
Nimzo-Indian Defense: Rubinstein System, Rubinstein Variation, Main Line
The position after 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Ne2 cxd4 6.exd4 O-O 7.a3.
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Ne2 cxd4 6. exd4 O-O 7. a3
Nimzo-Indian Defense: Rubinstein System, Rubinstein Variation, Main Line is filed under ECO E42, a variation of Nimzo-Indian Defense: Rubinstein System, Rubinstein Variation. It is the position after 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Ne2 cxd4 6.exd4 O-O 7.a3 — 13 half-moves in, with Black to move. Named theory ends here; beyond this the position is yours to work out.