Wins
72
Indexed tournament wins
Player record
Duah, John
Losses
56
Indexed tournament losses
Matches
128
Decisive results
Win rate
56.3%
Across indexed matches
Peak rating
1,853
Highest rating in the available history.
Biggest upset
Ruderman, Leon
Hawthorne/Northrop Open · Mar 13, 1994 · +335 rating
Open →Biggest loss
Ascoli, Edward
US Open · Jul 9, 1995 · -470 rating
Open →Most frequent opponent
Ralph Guillory
4 matches
Open →Rating trajectory
Published rating movement across recorded events.
Tournament history
26 tournament appearances · synced Aug 8, 2026, 2:16 AM
| Date | Tournament | Rating in | Rating after | Points changed | Record |
|---|---|---|---|---|---|
| Jul 4, 1994 | US OpenTournament · View matches | 1,769 | 1,732 | -37+1 / -38 | 4W / 3L |
| Jun 27, 1994 | Meikle John National Seniors OTournament · View matches | 1,824 | 1,769 | -55+1 / -56 | 1W / 2L |
| Jun 5, 1994 | West Covina 1994 OpenTournament · View matches | 1,830 | 1,824 | -6+1 / -7 | 1W / 1L |
| Apr 9, 1994 | Rialto Spring OpenTournament · View matches | 1,848 | 1,830 | -18 | 5W / 2L |
| Mar 20, 1994 | 1994 Chinese New Year All StarTournament · View matches | 1,853 | 1,848 | -5+0 / -5 | 0W / 1L |
| Mar 13, 1994 | Hawthorne/Northrop OpenTournament · View matches · USATT readjusted 1,619 → 1,825 | 1,619 | 1,853 | +28+31 / -3 | 2W / 2L |
21–26 of 26
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