ECO A29 · English Opening
English Opening: King's English Variation, Four Knights Variation, Fianchetto Line
The position after 1.c4 e5 2.Nc3 Nf6 3.Nf3 Nc6 4.g3.
1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3
English Opening: King's English Variation, Four Knights Variation, Fianchetto Line is filed under ECO A29, a variation of English Opening: King's English Variation, Four Knights Variation. It is the position after 1.c4 e5 2.Nc3 Nf6 3.Nf3 Nc6 4.g3 — 7 half-moves in, with Black to move. Named theory ends here; beyond this the position is yours to work out.