| Tournament | Round | Karen Richards | Cheah Siu Hean |
| 05.04.1999 Australian Championships (NSW) | 17 | 365 | 400 |
| 01.04.2002 Australian Championships (WA) | 5 | 371 | 466 |
| 12.04.2004 Australian Championships (ACT) | 13 | 297 | 529 |
| 09.04.2007 Australian Championships (NSW) | 5 | 296 | 447 |
| 25.04.2011 Aus Championship (ACT) | 10 | 326 | 528 |
| Head-to-head after 5 games | 0 | 5 | |
| Average score | 331 | 474 | |
| Spread: | -715 | 715 | |