A20 — English Opening: King's English Variation
Flank & English openings (A00–A99)
ECO A20 covers English Opening: King's English Variation and related lines (English Opening: King's English Variation, English Opening: King's English Variation, Nimzowitsch Variation, English Opening: Drill Variation, English Opening: King's English Variation, Nimzowitsch-Flohr Variation). Main line 1. c4 e5 with variations, statistics, and the best responses.
5 lines under A20
English Opening: King's English Variation, Nimzowitsch Variation
1. c4 e5 2. Nf3
English Opening: Drill Variation
1. c4 e5 2. g3 h5
English Opening: King's English Variation, Nimzowitsch-Flohr Variation
1. c4 e5 2. Nf3 e4
English Opening: King's English Variation, Kahiko-Hula Gambit
1. c4 e5 2. e3 Nf6 3. f4 exf4 4. Nf3