ECO D15 · Slav Defense
Slav Defense: Chebanenko Variation, Advance System
The position after 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 a6 5.c5.
1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 a6 5. c5
Slav Defense: Chebanenko Variation, Advance System is filed under ECO D15, a variation of Slav Defense: Chebanenko Variation. It is the position after 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 a6 5.c5 — 9 half-moves in, with Black to move. Named theory ends here; beyond this the position is yours to work out.