ECO D16 · Slav Defense
Slav Defense: Alapin Variation
The position after 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4.
1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4
Slav Defense: Alapin Variation is filed under ECO D16, a variation of Slav Defense. It is the position after 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 — 9 half-moves in, with Black to move. From here theory names 4 continuations: Bf5, Bg4, Na6, e6.