| Date | Tournament | State | Round | Betty Irwin | Heather Sorensen |
|---|---|---|---|---|---|
| 05/12/1999 | ACT Christmas Capers | ACT | 10 | 391 | 312 |
| 27/05/2001 | Ulladulla | NSW | 7 | 399 | 292 |
| 09/12/2001 | ACT Championships | ACT | 8 | 341 | 299 |
| 26/05/2002 | Ulladulla | NSW | 2 | 407 | 352 |
| 23/11/2003 | ACT Championships | ACT | 12 | 384 | 328 |
| 21/02/2004 | Wollongong | NSW | 6 | 343 | 359 |
| 22/05/2005 | Ulladulla | NSW | 11 | 377 | 356 |
| 28/05/2006 | Ulladulla Championship | NSW | 5 | 351 | 390 |
| 17/06/2006 | Wollongong Marj Babb | NSW | 2 | 404 | 325 |
| 20/05/2007 | Ulladulla 2007 | NSW | 10 | 365 | 346 |
| 18/05/2008 | Ulladulla | NSW | 2 | 318 | 395 |
| 14/06/2008 | Wollongong | NSW | 7 | 261 | 395 |
| 02/11/2008 | Nowra Bomaderry 2008 | NSW | 5 | 331 | 387 |
| 02/11/2008 | Nowra Bomaderry 2008 | NSW | 12 | 416 | 358 |
| 31/10/2009 | Nowra 2009 | NSW | 6 | 287 | 372 |
| 06/11/2010 | Nowra | NSW | 12 | 311 | 385 |
| Head-to-head after 16 games | 9 | 7 | |||
| Average score | 355.38 | 353.19 | |||
| Spread | 35 | -35 | |||