| Tournament | Round | Marilyn Mackie | Elwyn Chalk |
| 15.02.1998 Fremantle (WA) | 3 | 345 | 355 |
| 12.07.1998 WA Masters (WA) | 16 | 452 | 319 |
| 13.06.1999 Advanced Intermediate Recreation (WA) | 6 | 393 | 354 |
| 11.07.1999 Western Australian Masters (WA) | 10 | 357 | 376 |
| 19.09.1999 Spring Subiaco (WA) | 3 | 399 | 357 |
| 17.10.1999 Rockingham (WA) | 2 | 331 | 371 |
| 13.02.2000 Fremantle (WA) | 6 | 389 | 366 |
| 15.11.2000 Coogee (WA) | 3 | 389 | 344 |
| 24.03.2002 WA Marathon (WA) | 4 | 364 | 364 |
| 24.03.2002 WA Marathon (WA) | 9 | 389 | 327 |
| 10.11.2002 Coogee (WA) | 4 | 376 | 327 |
| 30.11.2003 Hamersley (WA) | 4 | 380 | 330 |
| Head-to-head after 12 games | 8.5 | 3.5 | |
| Average score | 380.33 | 349.16 | |
| Spread: | 374 | -374 | |