| Tournament | Round | Betty Irwin | Christine Foot |
| 21.05.2000 Ulladulla (NSW) | 12 | 306 | 439 |
| 24.11.2002 ACT Championships (ACT) | 5 | 356 | 315 |
| 20.05.2007 Ulladulla 2007 (NSW) | 1 | 371 | 383 |
| 20.05.2007 Ulladulla 2007 (NSW) | 14 | 324 | 408 |
| Head-to-head after 4 games | 1 | 3 | |
| Average score | 339.25 | 386.25 | |
| Spread: | -188 | 188 | |