| Tournament | Round | Doris Schwenn | Trevor Halsall |
| 15.04.1998 Australian Championships (TAS) | 10 | 409 | 357 |
| 13.02.2000 South Australian Championships (SA) | 11 | 352 | 342 |
| 08.03.2003 South Australian Championships (SA) | 3 | 348 | 407 |
| 12.04.2004 Australian Championships (ACT) | 1 | 299 | 448 |
| Head-to-head after 4 games | 2 | 2 | |
| Average score | 352 | 388.5 | |
| Spread: | -146 | 146 | |