| Tournament | Round | Alastair Richards | Mary McMahon |
| 07.03.2004 South Australian Championships (SA) | 4 | 486 | 389 |
| 07.03.2004 South Australian Championships (SA) | 14 | 399 | 403 |
| 17.04.2006 Australian Championships (QLD) | 7 | 385 | 404 |
| 17.04.2006 Australian Championships (QLD) | 21 | 433 | 318 |
| 10.06.2006 vic06 3 DAY (VIC) | 24 | 341 | 369 |
| 11.06.2007 Victorian Championships (VIC) | 17 | 439 | 342 |
| 29.12.2009 DECATHON (VIC) | 2 | 434 | 375 |
| 27.06.2010 Trans Tasman Support (VIC) | 5 | 467 | 367 |
| 28.03.2016 Australian Championship (SA) | 5 | 471 | 288 |
| Head-to-head after 9 games | 6 | 3 | |
| Average score | 428.33 | 361.66 | |
| Spread: | 600 | -600 | |