ECO C30
30 named openings and variations are classified as C30. ECO (Encyclopaedia of Chess Openings) codes group openings from A00 to E99 by their opening moves.
- King's GambitC301. e4 e5 2. f4
- King's Gambit Declined: Classical VariationC301. e4 e5 2. f4 Bc5
- King's Gambit Declined: Classical Variation, Euwe AttackC301. e4 e5 2. f4 Bc5 3. Nf3 d6 4. c3 Bg4 5. fxe5 dxe5 6. Qa4+
- King's Gambit Declined: Classical Variation, Rotlewi CountergambitC301. e4 e5 2. f4 Bc5 3. Nf3 d6 4. b4
- King's Gambit Declined: Classical Variation, Rubinstein CountergambitC301. e4 e5 2. f4 Bc5 3. Nf3 d6 4. c3 f5
- King's Gambit Declined: Classical Variation, Walthoffen AttackC301. e4 e5 2. f4 Bc5 3. Qh5
- King's Gambit Declined: Classical, Hanham VariationC301. e4 e5 2. f4 Bc5 3. Nf3 d6 4. Nc3 Nd7
- King's Gambit Declined: Classical, Réti VariationC301. e4 e5 2. f4 Bc5 3. Nf3 d6 4. c3 f5 5. fxe5 dxe5 6. d4 exd4 7. Bc4
- King's Gambit Declined: Classical, Soldatenkov VariationC301. e4 e5 2. f4 Bc5 3. Nf3 d6 4. fxe5
- King's Gambit Declined: Classical, Svenonius VariationC301. e4 e5 2. Bc4 Nc6 3. Nc3 Nf6 4. d3 Bc5 5. f4 d6 6. Nf3 Bg4 7. h3 Bxf3 8. Qxf3 exf4
- King's Gambit Declined: Hobbs-Zilbermints GambitC301. e4 e5 2. f4 Nc6 3. Nf3 g5 4. fxg5 h6
- King's Gambit Declined: Keene DefenseC301. e4 e5 2. f4 Qh4+ 3. g3 Qe7
- King's Gambit Declined: Keene's DefenseC301. e4 e5 2. f4 Qh4+
- King's Gambit Declined: Mafia DefenseC301. e4 c5 2. f4 e5
- King's Gambit Declined: Miles DefenseC301. e4 e5 2. f4 Nc6 3. Nf3 f5
- King's Gambit Declined: Norwalde VariationC301. e4 e5 2. f4 Qf6
- King's Gambit Declined: Norwalde Variation, Bücker GambitC301. e4 e5 2. f4 Qf6 3. Nc3 Qxf4 4. Nf3 Bb4 5. Bc4
- King's Gambit Declined: Norwalde Variation, Schubert VariationC301. e4 e5 2. f4 Qf6 3. Nc3 Qxf4 4. d4
- King's Gambit Declined: Panteldakis CountergambitC301. e4 e5 2. f4 f5
- King's Gambit Declined: Panteldakis Countergambit, Greco VariationC301. e4 e5 2. f4 f5 3. exf5 Qh4+
- King's Gambit Declined: Panteldakis Countergambit, Pawn Sacrifice LineC301. e4 e5 2. f4 f5 3. exf5 exf4 4. Qh5+ g6 5. fxg6 Qe7+ 6. Kd1
- King's Gambit Declined: Panteldakis Countergambit, Schiller's DefenseC301. e4 e5 2. f4 f5 3. exf5 Bc5
- King's Gambit Declined: Panteldakis Countergambit, Shirazi LineC301. e4 e5 2. f4 f5 3. exf5 exf4 4. Qh5+ Ke7
- King's Gambit Declined: Panteldakis Countergambit, Symmetrical VariationC301. e4 e5 2. f4 f5 3. exf5 exf4 4. Nf3 d5 5. d4 Bd6 6. Bd3
- King's Gambit Declined: Petrov's DefenseC301. e4 e5 2. f4 Nf6
- King's Gambit Declined: Queen's Knight DefenseC301. e4 e5 2. f4 Nc6
- King's Gambit Declined: Senechaud CountergambitC301. e4 e5 2. f4 Bc5 3. Nf3 g5
- King's Gambit Declined: Soller-Zilbermints GambitC301. e4 e5 2. f4 f6 3. fxe5 Nc6
- King's Gambit Declined: Zilbermints Double CountergambitC301. e4 e5 2. f4 g5
- King's Gambit Declined: Zilbermints Double GambitC301. e4 e5 2. f4 Nc6 3. Nf3 g5