King's pawn game (C20)
e4 e5
e4 e5
| Alapin's opening (C20) Ne2 | Bc4 Bishop's opening (C23) |
| Bishop's opening (C23) Bc4 | Nc3 Vienna game (C25) |
| Centre game (C21) d4 ed | Ne2 Alapin's opening (C20) |
| KP Indian opening (C20) d3 | Nf3 King's knight opening (C40) |
| KP King's head opening (C20) f3 | Qf3 KP Napoleon's opening (C20) |
| KP Lopez opening (C20) c3 | Qh5 KP Patzer opening (C20) |
| KP Mengarini's opening (C20) a3 | a3 KP Mengarini's opening (C20) |
| KP Napoleon's opening (C20) Qf3 | c3 KP Lopez opening (C20) |
| KP Patzer opening (C20) Qh5 | d3 KP Indian opening (C20) |
| King's gambit (C30) f4 | d4 ed Centre game (C21) |
| King's knight opening (C40) Nf3 | f3 KP King's head opening (C20) |
| Vienna game (C25) Nc3 | f4 King's gambit (C30) |