ECO D19
3 named openings and variations are classified as D19. ECO (Encyclopaedia of Chess Openings) codes group openings from A00 to E99 by their opening moves.
- Slav Defense: Czech Variation, Classical System, Main LineD191. 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
- Slav Defense: Czech Variation, Dutch VariationD191. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 e6 7. Bxc4 Bb4 8. O-O
- Slav Defense: Czech Variation, Dutch Variation, Sämisch VariationD191. 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 Ne4 10. g4