Dutch Defense: Classical Variation, Blackburne Attack
ECO A91
Move order
1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nh3
Ideas
ECO A covers irregular and flank openings—systems that skip the main e4/d4 fight early. White builds a pawn center and keeps the position more closed than after 1. e4. This entry tracks a longer branch in the opening tree. Use the diagram and SAN list to recognize the tabiya, then try the line against Maia to explore typical plans in practice.