Wins
8
Indexed tournament wins
Player record
D Koscielski
Losses
12
Indexed tournament losses
Matches
20
Decisive results
Win rate
40.0%
Across indexed matches
Peak rating
1,349
Highest rating in the available history.
Biggest upset
M. Marconias
Arizona Open · Feb 20, 1994 · +359 rating
Open →Biggest loss
Not enough data
No qualifying loss available.
Most frequent opponent
H. Barlow
1 match
Open →Rating trajectory
Published rating movement across recorded events.
Tournament history
2 tournament appearances · synced Aug 25, 2026, 2:25 AM
| Date | Tournament | Rating in | Rating after | Points changed | Record |
|---|---|---|---|---|---|
| Dec 7, 1997 | 1997 2nd Annual US Nationals "Tournament · View matches · Initial rating 1,349 | Unrated | 1,349 | -6+6 / -12 | 1W / 3L |
| Feb 20, 1994 | Arizona OpenTournament · View matches | 910 | 1,166 | +256 | 7W / 9L |
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