| Tournament | Round | Betty Irwin | Jean Balmer |
| 21.05.2000 Ulladulla (NSW) | 11 | 364 | 336 |
| 27.05.2001 Ulladulla (NSW) | 11 | 330 | 398 |
| 23.02.2002 Wollongong (NSW) | 1 | 328 | 409 |
| 21.02.2004 Wollongong (NSW) | 7 | 309 | 421 |
| 21.02.2006 Ulladulla SUmmer Games Tuesday (NSW) | 1 | 355 | 397 |
| 23.02.2006 Ulladulla Summer Games Thursday (NSW) | 8 | 381 | 383 |
| Head-to-head after 6 games | 1 | 5 | |
| Average score | 344.5 | 390.66 | |
| Spread: | -277 | 277 | |