Wins
4
Indexed tournament wins
Player record
Jeffrey Kosoff
Losses
4
Indexed tournament losses
Matches
8
Decisive results
Win rate
50.0%
Across indexed matches
Peak rating
1,218
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
Louis Cantor
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 26, 2026, 2:26 AM
| Date | Tournament | Rating in | Rating after | Points changed | Record |
|---|---|---|---|---|---|
| Oct 25, 2009 | TCTTA Fall Open Double RRTournament · View matches · Initial rating 1,218 | Unrated | 1,218 | — | 4W / 4L |
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