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