| Tournament | Round | Mary McMahon | Rene Chelton |
| 08.06.1998 Victorian Championships (VIC) | 18 | 457 | 421 |
| 14.06.1999 Victorian Championships (VIC) | 13 | 443 | 438 |
| 12.06.2000 Victorian Championships (VIC) | 9 | 491 | 400 |
| 16.04.2001 Australian Championships (VIC) | 2 | 346 | 399 |
| 09.06.2003 Quen Elizabeth Derby (VIC) | 4 | 332 | 419 |
| 14.06.2004 Victorian Championships (VIC) | 14 | 466 | 310 |
| 17.04.2006 Australian Championships (QLD) | 9 | 392 | 333 |
| 13.06.2016 Queen's Birthday (VIC) | 2 | 431 | 305 |
| Head-to-head after 8 games | 6 | 2 | |
| Average score | 419.75 | 378.12 | |
| Spread: | 333 | -333 | |