King's gambit (C30)
e4 e5 f4
e4 e5 f4
| KGD 2...Nf6 (C30) Nf6 | Bc5 KGD classical variation (C30) |
| KGD Falkbeer counter-gambit (C31) d5 | Nf6 KGD 2...Nf6 (C30) |
| KGD Keene's defence (C30) Qh4 g3 Qe7 | Qf6 KGD Norwalde variation (C30) |
| KGD Mafia defence (C30) c5 | Qh4 g3 Qe7 KGD Keene's defence (C30) |
| KGD Norwalde variation (C30) Qf6 | c5 KGD Mafia defence (C30) |
| KGD classical variation (C30) Bc5 | d5 KGD Falkbeer counter-gambit (C31) |
| King's gambit accepted (C33) ef | ef King's gambit accepted (C33) |