Wins
0
Indexed tournament wins
Player record
Costello, Jason
Losses
9
Indexed tournament losses
Matches
9
Decisive results
Win rate
0.0%
Across indexed matches
Peak rating
1,799
Highest rating in the available history.
Biggest upset
Not enough data
No qualifying upset available.
Biggest loss
Chuang, Jasmine
2016 Bellevue Fall Open · Oct 22, 2016 · -579 rating
Open →Most frequent opponent
Austin Z. Preiss
1 match
Open →Rating trajectory
Published rating movement across recorded events.
Tournament history
2 tournament appearances · synced Aug 9, 2026, 2:20 AM
| Date | Tournament | Rating in | Rating after | Points changed | Record |
|---|---|---|---|---|---|
| Oct 22, 2016 | 2016 Bellevue Fall OpenTournament · View matches | 1,799 | 1,642 | -157+0 / -157 | 0W / 6L |
| Sep 16, 2012 | 2012 Badger OpenTournament · View matches · Initial rating 1,799 | Unrated | 1,799 | — | 0W / 3L |
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