ECO C31
15 named openings and variations are classified as C31. ECO (Encyclopaedia of Chess Openings) codes group openings from A00 to E99 by their opening moves.
- King's Gambit Declined: Falkbeer CountergambitC311. e4 e5 2. f4 d5
- King's Gambit Declined: Falkbeer Countergambit AcceptedC311. e4 e5 2. f4 d5 3. exd5
- King's Gambit Declined: Falkbeer Countergambit, Anderssen AttackC311. e4 e5 2. f4 d5 3. exd5 e4 4. Bb5+
- King's Gambit Declined: Falkbeer Countergambit, Blackburne AttackC311. e4 e5 2. f4 d5 3. Nf3
- King's Gambit Declined: Falkbeer Countergambit, Charousek GambitC311. e4 e5 2. f4 d5 3. exd5 e4 4. d3
- King's Gambit Declined: Falkbeer Countergambit, Charousek Gambit, Morphy DefenseC311. e4 e5 2. Nc3 Nf6 3. f4 d5 4. exd5 e4 5. d3 Bb4 6. Bd2 e3
- King's Gambit Declined: Falkbeer Countergambit, Hinrichsen GambitC311. e4 e5 2. f4 d5 3. d4
- King's Gambit Declined: Falkbeer Countergambit, Miles GambitC311. e4 e5 2. f4 d5 3. exd5 Bc5
- King's Gambit Declined: Falkbeer Countergambit, Milner-Barry VariationC311. e4 e5 2. f4 d5 3. Nc3
- King's Gambit Declined: Falkbeer Countergambit, Modern TransferC311. e4 e5 2. f4 d5 3. exd5 exf4
- King's Gambit Declined: Falkbeer Countergambit, Nimzowitsch-Marshall CountergambitC311. e4 e5 2. f4 d5 3. exd5 c6
- King's Gambit Declined: Falkbeer Countergambit, Pickler GambitC311. e4 e5 2. f4 d5 3. exd5 c6 4. dxc6 Bc5
- King's Gambit Declined: Falkbeer Countergambit, Rubinstein VariationC311. e4 e5 2. f4 d5 3. exd5 e4 4. Nc3 Nf6 5. Qe2
- King's Gambit Declined: Falkbeer Countergambit, Staunton LineC311. e4 e5 2. f4 d5 3. exd5 e4
- Van Geet Opening: Grünfeld Defense, Steiner GambitC311. e4 e5 2. f4 d5 3. Nc3 dxe4 4. Nxe4