| Tournament | Round | Betty Mitchell | Melva Lehmann |
| 20.08.2000 Unley (SA) | 1 | 360 | 402 |
| 07.11.2002 September (SA) | 1 | 273 | 459 |
| 21.06.2003 Unley June (SA) | 5 | 349 | 331 |
| 20.07.2003 Hove (SA) | 4 | 394 | 330 |
| 10.08.2003 Unley August (SA) | 2 | 322 | 446 |
| 13.09.2003 Southern Tournament (SA) | 5 | 307 | 426 |
| 08.02.2004 February Open (SA) | 6 | 336 | 318 |
| 07.03.2004 South Australian Championships (SA) | 13 | 268 | 436 |
| 29.08.2004 Unley August (SA) | 3 | 336 | 341 |
| 18.09.2004 Southern Tournament (SA) | 5 | 344 | 365 |
| 16.10.2004 Unley October (SA) | 2 | 305 | 449 |
| 12.03.2006 South Australian Championships (SA) | 4 | 498 | 231 |
| 19.08.2006 SA August Tournament (SA) | 6 | 361 | 407 |
| Head-to-head after 13 games | 4 | 9 | |
| Average score | 342.53 | 380.07 | |
| Spread: | -488 | 488 | |