Wins
1
Indexed tournament wins
Player record
Marc Koltnow
Losses
1
Indexed tournament losses
Matches
2
Decisive results
Win rate
50.0%
Across indexed matches
Peak rating
942
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
Atsuko Chang
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 28, 2026, 2:28 AM
| Date | Tournament | Rating in | Rating after | Points changed | Record |
|---|---|---|---|---|---|
| May 30, 2019 | 2019 Meiklejohn North American Seniors OpenTournament · View matches · Initial rating 942 | Unrated | 942 | 0+4 / -4 | 1W / 1L |
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