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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%.

OpeningMovesGamesLength
Indian Defense 1. d4 Nf6 181.8M 1 move
Canard Opening 1. d4 Nf6 2. f4 1.2M 2 moves
Indian Defense: Accelerated London System 1. d4 Nf6 2. Bf4 25.4M 2 moves
Indian Defense: Gibbins-Weidenhagen Gambit 1. d4 Nf6 2. g4 118K 2 moves
Indian Defense: Omega Gambit 1. d4 Nf6 2. e4 775K 2 moves
Indian Defense: Pawn Push Variation 1. d4 Nf6 2. d5 480K 2 moves
Indian Defense: Tartakower Attack 1. d4 Nf6 2. g3 1.4M 2 moves
Paleface Attack 1. d4 Nf6 2. f3 804K 2 moves
Trompowsky Attack 1. d4 Nf6 2. Bg5 7.8M 2 moves
Indian Defense: Gibbins-Weidenhagen Gambit Accepted 1. d4 Nf6 2. g4 Nxg4 66K 2 moves
Indian Defense: Gibbins-Weidenhagen Gambit, Oshima Defense 1. d4 Nf6 2. g4 e5 809 2 moves
Indian Defense: Lazard Gambit 1. d4 Nf6 2. Nd2 e5 7,628 2 moves
Indian Defense: Maddigan Gambit 1. d4 Nf6 2. Nc3 e5 138K 2 moves
Indian Defense: Reversed Chigorin Defense 1. d4 Nf6 2. Nc3 c5 686K 2 moves
Queen's Pawn Game: Chigorin Variation 1. d4 Nf6 2. Nc3 d5 10.9M 2 moves
Trompowsky Attack: Classical Defense 1. d4 Nf6 2. Bg5 e6 2.2M 2 moves
Amazon Attack: Siberian Attack 1. d4 Nf6 2. Nc3 d5 3. Qd3 88K 3 moves
Indian Defense: Gedult Attack 1. d4 Nf6 2. f3 d5 3. g4 13K 3 moves
Indian Defense: Paleface Attack, Blackmar-Diemer Gambit Deferred 1. d4 Nf6 2. f3 d5 3. e4 162K 3 moves
Queen's Pawn Game: Veresov, Richter Attack 1. d4 Nf6 2. f3 d5 3. Nc3 422K 3 moves
Trompowsky Attack: Classical Defense, Big Center Variation 1. d4 Nf6 2. Bg5 e6 3. e4 920K 3 moves
Trompowsky Attack: Edge Variation 1. d4 Nf6 2. Bg5 Ne4 3. Bh4 509K 3 moves
Trompowsky Attack: Raptor Variation 1. d4 Nf6 2. Bg5 Ne4 3. h4 295K 3 moves
Trompowsky Attack: Borg Variation 1. d4 Nf6 2. Bg5 Ne4 3. Bf4 g5 125K 3 moves
Indian Defense: Gibbins-Weidenhagen Gambit, Maltese Falcon 1. d4 Nf6 2. g4 Nxg4 3. f3 Nf6 4. e4 5,831 4 moves
Indian Defense: Omega Gambit, Arafat Gambit 1. d4 Nf6 2. e4 Nxe4 3. Bd3 Nf6 4. Bg5 13K 4 moves
Trompowsky Attack: Poisoned Pawn Variation 1. d4 Nf6 2. Bg5 c5 3. d5 Qb6 4. Nc3 44K 4 moves
Trompowsky Attack: Raptor Variation, Hergert Gambit 1. d4 Nf6 2. Bg5 Ne4 3. h4 Nxg5 4. hxg5 e5 17K 4 moves
Indian Defense: Gibbins-Weidenhagen Gambit, Stummer Gambit 1. d4 Nf6 2. g4 Nxg4 3. e4 d6 4. Be2 Nf6 5. Nc3 7,348 5 moves
Trompowsky Attack: Edge Variation, Hergert Gambit 1. d4 Nf6 2. Bg5 Ne4 3. Bh4 d5 4. f3 Nf6 5. Nc3 Bf5 6. e4 243 6 moves
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 7 7 moves

https://chesscodex.org/eco/A45