Sanctioned Matchup Predictor
Joan Guggenheim vs Joyce Williams
Past Head-to-Head Rubbers (4)
| Winner | Loser | Score | Event | Rating Delta | |
|---|---|---|---|---|---|
| Joan Guggenheim | def. | Joyce Williams | 2008 Australian Veterans Championships (2008-10-18) | 0 | |
| Joyce Williams | def. | Joan Guggenheim | 2008 Australian Veterans Championships (2008-10-18) | +99 | |
| Joyce Williams | def. | Joan Guggenheim | 9,8,9 | 2010 Australian Veterans Championships (2010-10-24) | +68 |
| Joyce Williams | def. | Joan Guggenheim | 9,-9,3,10 | 2011 Australian Veterans Championships (2011-10-22) | +50 |