Wins
37
Indexed tournament wins
Player record
Jefferson, Jeff
Losses
29
Indexed tournament losses
Matches
66
Decisive results
Win rate
56.1%
Across indexed matches
Peak rating
1,144
Highest rating in the available history.
Biggest upset
Grecinger, Aaron
Minn Junior Fund Raiser Open · Jun 23, 1996 · +217 rating
Open →Biggest loss
Joe Podvin
Star of the North Winter Sport · Feb 1, 1998 · -731 rating
Open →Most frequent opponent
Kenyon, Richard
3 matches
Open →Rating trajectory
Published rating movement across recorded events.
Tournament history
7 tournament appearances · synced Aug 9, 2026, 2:27 AM
| Date | Tournament | Rating in | Rating after | Points changed | Record |
|---|---|---|---|---|---|
| Feb 1, 1998 | Star of the North Winter SportTournament · View matches | 1,128 | 1,078 | -50 | 3W / 2L |
| Feb 23, 1997 | Twin Cities Winter OpenTournament · View matches | 1,128 | 1,128 | 0+0 / 0 | 1W / 3L |
| Jan 19, 1997 | Star of the North Winter SportTournament · View matches | 1,106 | 1,128 | +22+49 / -27 | 7W / 6L |
| Nov 10, 1996 | Minnesota Fall Classic OpenTournament · View matches | 1,063 | 1,106 | +43 | 5W / 4L |
| Aug 11, 1996 | St. Louis Gateway OpenTournament · View matches | 1,144 | 1,063 | -81+2 / -83 | 4W / 5L |
| Jun 23, 1996 | Minn Junior Fund Raiser OpenTournament · View matches | 1,066 | 1,144 | +78 | 6W / 5L |
| May 4, 1996 | 2nd Annual North American ChalTournament · View matches · Initial rating 1,066 | Unrated | 1,066 | — | 11W / 4L |
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