A15 Zukertort Opening, with 1...Nf6 and ...b6

1.Nf3 Nf6 2.c4 b6

• A05 Zukertort Opening

  1.Nf3 Nf6 2.g3 b6 3.Bg2 Bb7 4.O‑O e6

• A15 English Opening: Anglo-Indian Defense, Queen's Indian Formation

  1.Nf3 Nf6 2.c4 b6

• A15 English Opening: Anglo-Indian Defense, Queen's Indian Formation

  3.g3 Bb7 4.Bg2 e6 5.O‑O Be7 6.b3 O‑O 7.Bb2 c5

• A15 English Opening: Anglo-Indian Defense, Queen's Indian Formation

  3.g3 Bb7 4.Bg2 e6 5.O‑O Be7 6.Nc3 O‑O