Zukertort Opening: The Walrus
ECO A04
Move order
1. Nf3 e5 2. Nxe5 Nc6 3. Nxc6 dxc6
Ideas
ECO A covers irregular and flank openings—systems that skip the main e4/d4 fight early. White develops a knight and keeps flexible transpositions into d4 or c4 setups. 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.