| 1.f25 | - | c64 |
| 2.ed3 |
| Regular defence | Treep defence | A dubious alternative |
3.d34-d8x5
6.ixe5-d9x6
7.f56-f0x7
8.f45-f9x6
9.jxg6
Three men and the game!
| 1.f25 |
| 1. ...c64 | 1. ...eg8 | ...e96 | ...f87 | ...c54 | ...c74 | ...bc4 |
| 2.ed3 | 2.fe4 | 2.ge5 |
| Regular defence |
| 7.f45 | 7.hg6 |
| Treep defence |
| 5.g56 | 5.e13 | 5.fe4 | 5.ge4 |
| A dubious alternative |
| One way out | Another way out |