| Tournament | Round | Colleen McCormick | Elwyn Chalk |
| 12.07.1998 WA Masters (WA) | 8 | 367 | 354 |
| 20.09.1998 Advanced Intermediate Recreation (WA) | 4 | 270 | 466 |
| 11.07.1999 Western Australian Masters (WA) | 5 | 377 | 429 |
| 08.08.1999 Bassendean (WA) | 5 | 399 | 369 |
| 17.10.1999 Rockingham (WA) | 3 | 412 | 326 |
| 25.06.2000 Advanced Intermediate Recreation (WA) | 4 | 437 | 326 |
| 24.03.2002 WA Marathon (WA) | 1 | 360 | 331 |
| 24.03.2002 WA Marathon (WA) | 10 | 433 | 337 |
| 21.04.2002 Nedlands (WA) | 2 | 325 | 469 |
| 08.09.2002 Yokine (WA) | 4 | 367 | 346 |
| 02.02.2003 Fremantle (WA) | 5 | 308 | 342 |
| 25.05.2003 Melville (WA) | 5 | 436 | 288 |
| 31.10.2004 Coogee (WA) | 6 | 371 | 368 |
| 06.02.2005 Fremantle (WA) | 3 | 361 | 382 |
| Head-to-head after 14 games | 9 | 5 | |
| Average score | 373.07 | 366.64 | |
| Spread: | 90 | -90 | |