ECO D17 · Slav Defense
Slav Defense: Czech Variation, Krause Attack
The position after 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Ne5.
1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5
Slav Defense: Czech Variation, Krause Attack is filed under ECO D17, a variation of Slav Defense: Czech Variation. It is the position after 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Ne5 — 11 half-moves in, with Black to move. From here theory names one continuation, e6.