Queen's pawn game (E00)
d4 Nf6 c4 e6
d4 Nf6 c4 e6
| Catalan opening (E00) g3 | Bg5 Neo-Indian attack (E00) |
| Neo-Indian attack (E00) Bg5 | Nc3 Bb4 Nimzo-Indian defence (E20) |
| Nimzo-Indian defence (E20) Nc3 Bb4 | Nf3 Queen's pawn game (E10) |
| Queen's pawn game (E10) Nf3 | g3 Catalan opening (E00) |