| Tournament | Round | Margaret Andrews | Trish Windhurst |
| 12.07.1998 Chatswood (NSW) | 1 | 365 | 394 |
| 15.08.1998 Revesby (NSW) | 5 | 294 | 342 |
| 05.10.1998 New South Wales Championships (NSW) | 10 | 302 | 508 |
| 05.10.1998 New South Wales Championships (NSW) | 14 | 309 | 419 |
| 12.12.1998 North Shore (NSW) | 2 | 416 | 334 |
| 10.07.1999 Chatswood (NSW) | 5 | 370 | 338 |
| 04.10.1999 New South Wales Championships (NSW) | 4 | 260 | 404 |
| 07.10.2002 New South Wales Championships (NSW) | 17 | 343 | 363 |
| 20.03.2005 Wyong (NSW) | 5 | 399 | 378 |
| 22.11.2009 Central Coast Championships (NSW) | 2 | 379 | 418 |
| 20.11.2011 CENTRAL COAST Two Days (NSW) | 3 | 319 | 326 |
| Head-to-head after 11 games | 3 | 8 | |
| Average score | 341.45 | 384 | |
| Spread: | -468 | 468 | |