Wins
591
Indexed tournament wins
Player record
Changping Duan
Losses
234
Indexed tournament losses
Matches
825
Decisive results
Win rate
71.6%
Across indexed matches
Peak rating
2,294
Highest rating in the available history.
Biggest upset
Guo, Peng
2005 N. American Teams Open Ch · Nov 27, 2005 · +325 rating
Open →Biggest loss
Fadi Kaddoura
Eastern Open on the 2004 Stiga · Jul 25, 2004 · -281 rating
Open →Most frequent opponent
David Sakai
9 matches
Open →Rating trajectory
Published rating movement across recorded events.
Tournament history
107 tournament appearances · synced Aug 7, 2026, 3:14 AM
| Date | Tournament | Rating in | Rating after | Points changed | Record |
|---|---|---|---|---|---|
| Jul 4, 2012 | US OpenTournament · View matches | 2,132 | 2,122 | -10 | 1W / 1L |
| Jun 9, 2012 | Manor June OpenTournament · View matches | 2,144 | 2,132 | -12+1 / -13 | 2W / 2L |
| Jun 3, 2012 | Meiklejohn North American Seniors OpenTournament · View matches | 2,152 | 2,144 | -8+3 / -11 | 4W / 3L |
| Dec 17, 2011 | 2011 US NationalsTournament · View matches | 2,172 | 2,152 | -20+3 / -23 | 3W / 2L |
| Jul 4, 2011 | 2011 US OpenTournament · View matches | 2,178 | 2,172 | -6+4 / -10 | 5W / 2L |
| Dec 18, 2010 | 2010 US NationalsTournament · View matches | 2,183 | 2,178 | -5+9 / -14 | 4W / 2L |
| Jul 3, 2010 | 2010 US OpenTournament · View matches | 2,193 | 2,183 | -10+2 / -12 | 4W / 2L |
| Mar 7, 2010 | Newgy Texas Wesleyan OpenTournament · View matches | 2,197 | 2,193 | -4 | 4W / 4L |
| Dec 19, 2009 | 2009 US NationalsTournament · View matches | 2,197 | 2,197 | 0+8 / -8 | 6W / 2L |
| Dec 20, 2008 | USATT Nationals ChampionshipsTournament · View matches | 2,215 | 2,197 | -18+1 / -19 | 4W / 2L |
| Jul 5, 2008 | U.S. OpenTournament · View matches | 2,225 | 2,215 | -10+0 / -10 | 1W / 1L |
| Dec 16, 2006 | U.S. National ChampionshipsTournament · View matches | 2,263 | 2,225 | -38+0 / -38 | 3W / 2L |
| Nov 26, 2006 | 2006 N. American Teams Open ChampionshipTournament · View matches | 2,252 | 2,263 | +11 | 5W / 0L |
| Jul 8, 2006 | U.S. OpenTournament · View matches | 2,282 | 2,252 | -30 | 4W / 2L |
| Dec 17, 2005 | 2005 US Nationals ChampionshipTournament · View matches | 2,294 | 2,282 | -12+6 / -18 | 6W / 2L |
| Nov 27, 2005 | 2005 N. American Teams Open ChTournament · View matches · USATT readjusted 2,151 → 2,274 | 2,151 | 2,294 | +20+57 / -37 | 3W / 7L |
| Jun 12, 2005 | Butterfly MDTTC OpenTournament · View matches | 2,167 | 2,151 | -16+0 / -16 | 1W / 2L |
| May 29, 2005 | Matthew Murad Memorial Open 20Tournament · View matches | 2,163 | 2,167 | +4+4 / 0 | 3W / 0L |
| Dec 18, 2004 | 2004 USA Nationals ChampionshipTournament · View matches | 2,187 | 2,163 | -24+5 / -29 | 3W / 2L |
| Nov 28, 2004 | 2004 N. American Teams Open TTTournament · View matches | 2,170 | 2,187 | +17 | 5W / 2L |