Wins
2
Indexed tournament wins
Player record
Jack Duffey
Losses
2
Indexed tournament losses
Matches
4
Decisive results
Win rate
50.0%
Across indexed matches
Peak rating
605
Highest rating in the available history.
Biggest upset
Not enough data
No qualifying upset available.
Biggest loss
Not enough data
No qualifying loss available.
Most frequent opponent
Jenny Chen
1 match
Open →Rating trajectory
Published rating movement across recorded events.
Rating history unavailable
More published rating points are needed before a trajectory can be drawn.
Tournament history
1 tournament appearances · synced Aug 29, 2026, 2:31 AM
| Date | Tournament | Rating in | Rating after | Points changed | Record |
|---|---|---|---|---|---|
| Sep 27, 1998 | Daly City War MemorialTournament · View matches · Initial rating 605 | Unrated | 605 | — | 2W / 2L |
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