ECO A45: Indian Defense, Trompowsky Attack & more

ECO A45 is part of volume A — Flank Openings. The Lichess chess-openings dataset files 31 named lines under it, from 6 different openings. The shortest is Indian Defense: 1. d4 Nf6.

That position has come up in 181,760,983 Lichess games between players rated 1600 to 2500: White won 48.3%, 5.5% were drawn and Black won 46.2%.

Opening	Moves	Plies
Indian Defense	`1. d4 Nf6`	2
Canard Opening	`1. d4 Nf6 2. f4`	3
Indian Defense: Accelerated London System	`1. d4 Nf6 2. Bf4`	3
Indian Defense: Gibbins-Weidenhagen Gambit	`1. d4 Nf6 2. g4`	3
Indian Defense: Omega Gambit	`1. d4 Nf6 2. e4`	3
Indian Defense: Pawn Push Variation	`1. d4 Nf6 2. d5`	3
Indian Defense: Tartakower Attack	`1. d4 Nf6 2. g3`	3
Paleface Attack	`1. d4 Nf6 2. f3`	3
Trompowsky Attack	`1. d4 Nf6 2. Bg5`	3
Indian Defense: Gibbins-Weidenhagen Gambit Accepted	`1. d4 Nf6 2. g4 Nxg4`	4
Indian Defense: Gibbins-Weidenhagen Gambit, Oshima Defense	`1. d4 Nf6 2. g4 e5`	4
Indian Defense: Lazard Gambit	`1. d4 Nf6 2. Nd2 e5`	4
Indian Defense: Maddigan Gambit	`1. d4 Nf6 2. Nc3 e5`	4
Indian Defense: Reversed Chigorin Defense	`1. d4 Nf6 2. Nc3 c5`	4
Queen's Pawn Game: Chigorin Variation	`1. d4 Nf6 2. Nc3 d5`	4
Trompowsky Attack: Classical Defense	`1. d4 Nf6 2. Bg5 e6`	4
Amazon Attack: Siberian Attack	`1. d4 Nf6 2. Nc3 d5 3. Qd3`	5
Indian Defense: Gedult Attack	`1. d4 Nf6 2. f3 d5 3. g4`	5
Indian Defense: Paleface Attack, Blackmar-Diemer Gambit Deferred	`1. d4 Nf6 2. f3 d5 3. e4`	5
Queen's Pawn Game: Veresov, Richter Attack	`1. d4 Nf6 2. f3 d5 3. Nc3`	5
Trompowsky Attack: Classical Defense, Big Center Variation	`1. d4 Nf6 2. Bg5 e6 3. e4`	5
Trompowsky Attack: Edge Variation	`1. d4 Nf6 2. Bg5 Ne4 3. Bh4`	5
Trompowsky Attack: Raptor Variation	`1. d4 Nf6 2. Bg5 Ne4 3. h4`	5
Trompowsky Attack: Borg Variation	`1. d4 Nf6 2. Bg5 Ne4 3. Bf4 g5`	6
Indian Defense: Gibbins-Weidenhagen Gambit, Maltese Falcon	`1. d4 Nf6 2. g4 Nxg4 3. f3 Nf6 4. e4`	7
Indian Defense: Omega Gambit, Arafat Gambit	`1. d4 Nf6 2. e4 Nxe4 3. Bd3 Nf6 4. Bg5`	7
Trompowsky Attack: Poisoned Pawn Variation	`1. d4 Nf6 2. Bg5 c5 3. d5 Qb6 4. Nc3`	7
Trompowsky Attack: Raptor Variation, Hergert Gambit	`1. d4 Nf6 2. Bg5 Ne4 3. h4 Nxg5 4. hxg5 e5`	8
Indian Defense: Gibbins-Weidenhagen Gambit, Stummer Gambit	`1. d4 Nf6 2. g4 Nxg4 3. e4 d6 4. Be2 Nf6 5. Nc3`	9
Trompowsky Attack: Edge Variation, Hergert Gambit	`1. d4 Nf6 2. Bg5 Ne4 3. Bh4 d5 4. f3 Nf6 5. Nc3 Bf5 6. e4`	11
Trompowsky Attack: Edge Variation, Hergert Gambit	`1. d4 Nf6 2. Bg5 Ne4 3. Bh4 c6 4. Nd2 Qa5 5. c3 Nxd2 6. Qxd2 d5 7. e4`	13