| Tournament | Round | Sybil Boyt | Doris Schwenn |
| 22.02.1998 Unley February (SA) | 3 | 337 | 428 |
| 29.03.1998 Unley (SA) | 3 | 337 | 428 |
| 24.05.1998 South Australian Championships (SA) | 11 | 407 | 327 |
| 14.02.1999 South Australian Championships (SA) | 1 | 250 | 479 |
| Head-to-head after 4 games | 1 | 3 | |
| Average score | 332.75 | 415.5 | |
| Spread: | -331 | 331 | |