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ECO C30: King's Gambit Declined & King's Gambit

ECO C30 is part of volume C, Open Games. The Lichess chess-openings dataset files 32 named lines under it, from 2 different openings. The shortest is King's Gambit: 1. e4 e5 2. f4.

That position has come up in 48,263,232 Lichess games between players rated 1600 to 2500: White won 51.6%, 3.6% were drawn and Black won 44.8%.

OpeningMovesGamesLength
King's Gambit 1. e4 e5 2. f4 48.3M 2 moves
King's Gambit Declined: Classical Variation 1. e4 e5 2. f4 Bc5 1.9M 2 moves
King's Gambit Declined: Keene's Defense 1. e4 e5 2. f4 Qh4+ 622K 2 moves
King's Gambit Declined: Mafia Defense 1. e4 c5 2. f4 e5 361K 2 moves
King's Gambit Declined: Norwalde Variation 1. e4 e5 2. f4 Qf6 207K 2 moves
King's Gambit Declined: Panteldakis Countergambit 1. e4 e5 2. f4 f5 236K 2 moves
King's Gambit Declined: Petrov's Defense 1. e4 e5 2. f4 Nf6 1M 2 moves
King's Gambit Declined: Queen's Knight Defense 1. e4 e5 2. f4 Nc6 10.2M 2 moves
King's Gambit Declined: Zilbermints Double Countergambit 1. e4 e5 2. f4 g5 3,736 2 moves
King's Gambit Declined: Classical Variation, Walthoffen Attack 1. e4 e5 2. f4 Bc5 3. Qh5 6,161 3 moves
King's Gambit Declined: Keene's Defense 1. e4 e5 2. f4 Qh4+ 3. g3 616K 3 moves
King's Gambit Declined: Keene Defense 1. e4 e5 2. f4 Qh4+ 3. g3 Qe7 339K 3 moves
King's Gambit Declined: Miles Defense 1. e4 e5 2. f4 Nc6 3. Nf3 f5 315K 3 moves
King's Gambit Declined: Panteldakis Countergambit, Greco Variation 1. e4 e5 2. f4 f5 3. exf5 Qh4+ 9,011 3 moves
King's Gambit Declined: Panteldakis Countergambit, Schiller's Defense 1. e4 e5 2. f4 f5 3. exf5 Bc5 2,048 3 moves
King's Gambit Declined: Senechaud Countergambit 1. e4 e5 2. f4 Bc5 3. Nf3 g5 411 3 moves
King's Gambit Declined: Soller-Zilbermints Gambit 1. e4 e5 2. f4 f6 3. fxe5 Nc6 5,625 3 moves
King's Gambit Declined: Zilbermints Double Gambit 1. e4 e5 2. f4 Nc6 3. Nf3 g5 1,352 3 moves
King's Gambit Declined: Classical Variation 1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. c3 322K 4 moves
King's Gambit Declined: Classical Variation, Rotlewi Countergambit 1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. b4 10K 4 moves
King's Gambit Declined: Classical, Soldatenkov Variation 1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. fxe5 131K 4 moves
King's Gambit Declined: Norwalde Variation, Schubert Variation 1. e4 e5 2. f4 Qf6 3. Nc3 Qxf4 4. d4 964 4 moves
King's Gambit Declined: Classical Variation, Rubinstein Countergambit 1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. c3 f5 4,147 4 moves
King's Gambit Declined: Classical, Hanham Variation 1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. Nc3 Nd7 1,773 4 moves
King's Gambit Declined: Hobbs-Zilbermints Gambit 1. e4 e5 2. f4 Nc6 3. Nf3 g5 4. fxg5 h6 394 4 moves
King's Gambit Declined: Panteldakis Countergambit, Shirazi Line 1. e4 e5 2. f4 f5 3. exf5 exf4 4. Qh5+ Ke7 11K 4 moves
King's Gambit Declined: Norwalde Variation, Bücker Gambit 1. e4 e5 2. f4 Qf6 3. Nc3 Qxf4 4. Nf3 Bb4 5. Bc4 1,345 5 moves
King's Gambit Declined: Classical Variation, Euwe Attack 1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. c3 Bg4 5. fxe5 dxe5 6. Qa4+ 1,376 6 moves
King's Gambit Declined: Panteldakis Countergambit, Pawn Sacrifice Line 1. e4 e5 2. f4 f5 3. exf5 exf4 4. Qh5+ g6 5. fxg6 Qe7+ 6. Kd1 258 6 moves
King's Gambit Declined: Panteldakis Countergambit, Symmetrical Variation 1. e4 e5 2. f4 f5 3. exf5 exf4 4. Nf3 d5 5. d4 Bd6 6. Bd3 1,400 6 moves
King's Gambit Declined: Classical, Réti Variation 1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. c3 f5 5. fxe5 dxe5 6. d4 exd4 7. Bc4 5 7 moves
King's Gambit Declined: Classical, Svenonius Variation 1. e4 e5 2. Bc4 Nc6 3. Nc3 Nf6 4. d3 Bc5 5. f4 d6 6. Nf3 Bg4 7. h3 Bxf3 8. Qxf3 exf4 1,730 8 moves

https://chesscodex.org/eco/C30