Zukertort Opening: Tennison Gambit, Brigg's Trap
ECO A06
Move order
1. e4 d5 2. Nf3 dxe4 3. Ng5 Nf6 4. Nc3 Bf5 5. Qe2 Qd4
Ideas
ECO A covers irregular and flank openings—systems that skip the main e4/d4 fight early. White stakes a claim in the center and opens lines for the bishop and queen. 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.