Bird Opening: Double Duck Formation
ECO A02
Move order
1. f4 f5 2. d4 d5
Ideas
ECO A covers irregular and flank openings—systems that skip the main e4/d4 fight early. White contests the center aggressively from the flank—the Bird family. The variation is defined by a short, recognizable move order. Use the diagram and SAN list to recognize the tabiya, then try the line against Maia to explore typical plans in practice.