Wins
0
Indexed tournament wins
Player record
Joanna Kostka
Losses
1
Indexed tournament losses
Matches
1
Decisive results
Win rate
0.0%
Across indexed matches
Peak rating
1,458
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
Amy Feng
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 27, 2026, 2:25 AM
| Date | Tournament | Rating in | Rating after | Points changed | Record |
|---|---|---|---|---|---|
| Sep 4, 1994 | CNE International OpenTournament · View matches | 1,458 | 1,458 | 0+0 / 0 | 0W / 1L |
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