ECO D05
Rubinstein Opening
The position after 1.d4 Nf6 2.Nf3 e6 3.e3 c5 4.Bd3 d5 5.b3.
1. d4 Nf6 2. Nf3 e6 3. e3 c5 4. Bd3 d5 5. b3
Rubinstein Opening is filed under ECO D05. It is the position after 1.d4 Nf6 2.Nf3 e6 3.e3 c5 4.Bd3 d5 5.b3 — 9 half-moves in, with Black to move. Named theory ends here; beyond this the position is yours to work out.