ECO A21: English Opening
ECO A21 is part of volume A — Flank Openings.
The Lichess chess-openings dataset files 6 named lines under it.
The shortest is English Opening: King's English Variation, Reversed Sicilian:
1. c4 e5 2. Nc3.
That position has come up in 18,498,372 Lichess games between players rated 1600 to 2500: White won 51.7%, 4.9% were drawn and Black won 43.4%.
| Opening | Moves | Plies |
|---|---|---|
| English Opening: King's English Variation, Reversed Sicilian | 1. c4 e5 2. Nc3 |
3 |
| English Opening: King's English Variation, Kramnik-Shirov Counterattack | 1. c4 e5 2. Nc3 Bb4 |
4 |
| English Opening: King's English Variation | 1. c4 e5 2. Nc3 d6 3. Nf3 |
5 |
| English Opening: King's English Variation, Keres Defense | 1. c4 e5 2. Nc3 d6 3. g3 c6 |
6 |
| English Opening: King's English Variation, Smyslov Defense | 1. c4 e5 2. Nc3 d6 3. Nf3 Bg4 |
6 |
| English Opening: King's English Variation, Troger Defense | 1. c4 e5 2. Nc3 Nc6 3. g3 d6 4. Bg2 Be6 |
8 |