D19
Slav Defense: Czech Variation, Classical System, Main Line
1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 e6 7. Bxc4 Bb4 8. O-O O-O 9. Qe2
The Slav Defense: Czech Variation, Classical System, Main Line is a chess opening classified under ECO code D19. It is reached after the moves 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 e6 7. Bxc4 Bb4 8. O-O O-O 9. Qe2.
It belongs to the Slav Defense family — one of many ways the line can branch. Understanding the parent system’s plans is the fastest way to play this variation well.
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