| Tournament | Round | Betty Mitchell | Dieter Jedamski |
| 19.01.2000 January Open (SA) | 4 | 366 | 369 |
| 14.01.2001 January Open (SA) | 6 | 356 | 386 |
| 08.02.2004 February Open (SA) | 1 | 340 | 333 |
| 17.07.2005 July (SA) | 5 | 370 | 391 |
| 28.12.2007 SA Christmas Leftovers (SA) | 2 | 338 | 426 |
| 22.06.2008 SA June Tournament (SA) | 1 | 295 | 475 |
| 14.11.2009 Southern Tournament (SA) | 6 | 420 | 367 |
| 22.11.2009 November SA (SA) | 2 | 337 | 377 |
| 07.02.2010 SA February (SA) | 5 | 370 | 355 |
| 07.03.2010 SA Championship (SA) | 7 | 355 | 511 |
| 23.10.2010 Vic/SA Border Challenge (VIC) | 10 | 376 | 312 |
| 18.10.2015 SA/Vic Border Challenge (SA) | 9 | 314 | 381 |
| Head-to-head after 12 games | 4 | 8 | |
| Average score | 353.08 | 390.25 | |
| Spread: | -446 | 446 | |