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