| Tournament | Round | Bronwyn Piechnick | Betty Mitchell |
| 12.09.1998 September (SA) | 1 | 288 | 365 |
| 25.07.1999 July (SA) | 3 | 328 | 293 |
| 11.09.2010 September (SA) | 1 | 324 | 411 |
| 23.10.2010 Vic/SA Border Challenge (VIC) | 2 | 399 | 407 |
| 03.11.2012 SA November (SA) | 2 | 403 | 298 |
| 09.04.2016 SA April (SA) | 5 | 296 | 332 |
| 14.05.2016 SA May (SA) | 4 | 370 | 398 |
| 18.06.2016 June SA Scrabble (SA) | 2 | 329 | 342 |
| 09.07.2016 AGM July Tourney (SA) | 1 | 345 | 346 |
| 19.11.2016 SA NOVEMBER (SA) | 3 | 390 | 313 |
| 08.07.2017 SA July (SA) | 2 | 303 | 351 |
| Head-to-head after 11 games | 3 | 8 | |
| Average score | 343.18 | 350.54 | |