ECO A02: Bird Opening

ECO A02 is part of volume A — Flank Openings. The Lichess chess-openings dataset files 19 named lines under it. The shortest is Bird Opening: 1. f4.

That position has come up in 28,641,334 Lichess games between players rated 1600 to 2500: White won 49.7%, 4.6% were drawn and Black won 45.7%.

Opening	Moves	Plies
Bird Opening	`1. f4`	1
Bird Opening: From's Gambit	`1. f4 e5`	2
Bird Opening: Hobbs Gambit	`1. f4 g5`	2
Bird Opening: Horsefly Defense	`1. f4 Nh6`	2
Bird Opening: Myers Defense	`1. f4 b5`	2
Bird Opening: From's Gambit, Bahr Gambit	`1. f4 e5 2. Nc3`	3
Bird Opening: Mujannah	`1. f4 Nf6 2. c4`	3
Bird Opening: Wagner-Zwitersch Gambit	`1. f4 f5 2. e4`	3
Bird Opening: Double Duck Formation	`1. f4 f5 2. d4 d5`	4
Bird Opening: Hobbs-Zilbermints Gambit	`1. f4 h6 2. Nf3 g5`	4
Bird Opening: Lasker Gambit	`1. f4 e5 2. fxe5 f6`	4
Bird Opening: Platz Gambit	`1. f4 e5 2. fxe5 Ne7`	4
Bird Opening: Schlechter Gambit	`1. f4 e5 2. fxe5 Nc6`	4
Bird Opening: Batavo-Polish Attack	`1. f4 Nf6 2. Nf3 g6 3. b4`	5
Bird Opening: From's Gambit, Langheld Gambit	`1. f4 e5 2. fxe5 d6 3. exd6 Nf6`	6
Bird Opening: Siegener Gambit	`1. f4 e5 2. d4 exd4 3. Nf3 c5 4. c3`	7
Bird Opening: Swiss Gambit	`1. f4 f5 2. e4 fxe4 3. Nc3 Nf6 4. g4`	7
Bird Opening: From's Gambit, Lasker Variation	`1. f4 e5 2. fxe5 d6 3. exd6 Bxd6 4. Nf3 g5`	8
Bird Opening: From's Gambit, Lipke Variation	`1. f4 e5 2. fxe5 d6 3. exd6 Bxd6 4. Nf3 Nh6 5. d4`	9