| Tournament | Round | Ruth Probert | Lois Usher |
| 16.06.2002 Advanced Intermediate Recreation (WA) | 2 | 328 | 263 |
| 23.02.2003 Kwinana (WA) | 2 | 293 | 342 |
| 06.04.2003 Nedlands (WA) | 3 | 345 | 338 |
| 25.05.2003 Melville (WA) | 3 | 276 | 313 |
| 30.05.2004 Melville (WA) | 5 | 295 | 351 |
| 01.04.2007 Nedlands (WA) | 6 | 330 | 284 |
| 03.02.2008 Fremantle (WA) | 6 | 282 | 362 |
| Head-to-head after 7 games | 3 | 4 | |
| Average score | 307 | 321.85 | |