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