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 |
|---|---|---|---|---|---|
| Dec 21, 1997 | US NationalsTournament · View matches | 1,807 | 1,804 | -3+2 / -5 | 2W / 1L |
| Sep 7, 1997 | Pacific Coast OpenTournament · View matches | 1,800 | 1,807 | +7+10 / -3 | 2W / 2L |
| Jul 20, 1997 | 1997 AGBUTournament · View matches | 1,800 | 1,800 | 0+24 / -24 | 3W / 3L |
| Jun 8, 1997 | Meiklejohn Nat'l Seniors TTTTournament · View matches | 1,829 | 1,800 | -29+7 / -36 | 1W / 2L |
| Mar 16, 1997 | Hawthorne/Northrop OpenTournament · View matches | 1,829 | 1,829 | 0+0 / 0 | 1W / 0L |
| Dec 22, 1996 | 1996 U.S. NationalsTournament · View matches | 1,804 | 1,829 | +25+30 / -5 | 7W / 3L |
| Dec 1, 1996 | Loma Linda US Nationals Warm-uTournament · View matches | 1,816 | 1,804 | -12+0 / -12 | 0W / 2L |
| Nov 3, 1996 | Pacific Coast Memorial OpenTournament · View matches | 1,837 | 1,816 | -21+0 / -21 | 0W / 2L |
| Jul 22, 1996 | AGBU TTTTournament · View matches | 1,840 | 1,837 | -3+10 / -13 | 3W / 2L |
| Jun 23, 1996 | California State OpenTournament · View matches | 1,849 | 1,840 | -9+1 / -10 | 1W / 3L |
| Jun 9, 1996 | Meiklejohn National Seniors TTTournament · View matches | 1,824 | 1,849 | +25+61 / -36 | 2W / 2L |
| Mar 24, 1996 | Rialto Spring OpenTournament · View matches | 1,822 | 1,824 | +2+2 / 0 | 2W / 1L |
| Dec 18, 1995 | USATT National ChampionshipsTournament · View matches | 1,840 | 1,852 | +12+23 / -11 | 4W / 2L |
| Nov 26, 1995 | Rialto OpenTournament · View matches | 1,736 | 1,840 | +104 | 8W / 3L |
| Oct 1, 1995 | Pacific CoastTournament · View matches | 1,727 | 1,736 | +9+20 / -11 | 4W / 2L |
| Jul 9, 1995 | US OpenTournament · View matches | 1,773 | 1,727 | -46+9 / -55 | 6W / 4L |
| Mar 12, 1995 | Hawthorne/Northrop OpenTournament · View matches | 1,769 | 1,773 | +4+10 / -6 | 3W / 1L |
| Feb 5, 1995 | Dr. Wang Chinese New Year OpenTournament · View matches | 1,767 | 1,769 | +2+4 / -2 | 1W / 2L |
| Dec 18, 1994 | US NationalsTournament · View matches | 1,725 | 1,767 | +42 | 8W / 5L |
| Nov 20, 1994 | Pacific Coast OpenTournament · View matches | 1,732 | 1,725 | -7 | 1W / 3L |
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