Wins
28
Indexed tournament wins
Player record
Koch, David
Losses
114
Indexed tournament losses
Matches
142
Decisive results
Win rate
19.7%
Across indexed matches
Peak rating
1,164
Highest rating in the available history.
Biggest upset
Chu, Raymond
2004 Bellevue Spring Open · Apr 25, 2004 · +667 rating
Open →Biggest loss
Cynthia Tan
Viducich Stiga Pacific Rim Ope · Nov 6, 2005 · -723 rating
Open →Most frequent opponent
Alex Sumeri
5 matches
Open →Rating trajectory
Published rating movement across recorded events.
Tournament history
19 tournament appearances · synced Aug 9, 2026, 2:26 AM
| Date | Tournament | Rating in | Rating after | Points changed | Record |
|---|---|---|---|---|---|
| Apr 11, 2009 | 3rd Annual Bill Mason MemorialTournament · View matches | 1,143 | 1,163 | +20+20 / 0 | 3W / 6L |
| Jun 15, 2008 | Rose City Open 2008Tournament · View matches | 1,151 | 1,143 | -8+0 / -8 | 0W / 6L |
| Nov 4, 2007 | Bob Viducich Stiga Pacific RimTournament · View matches | 1,151 | 1,151 | 0+0 / 0 | 0W / 3L |
| Dec 16, 2006 | U.S. National ChampionshipsTournament · View matches | 1,159 | 1,151 | -8 | 0W / 11L |
| Nov 12, 2006 | 18th Annual Viducich Stiga PacificTournament · View matches | 1,139 | 1,159 | +20+20 / 0 | 1W / 2L |
| Jun 18, 2006 | 2006 Rose City OpenTournament · View matches | 1,145 | 1,139 | -6+8 / -14 | 4W / 5L |
| Dec 17, 2005 | 2005 US Nationals ChampionshipTournament · View matches | 1,136 | 1,145 | +9+21 / -12 | 2W / 9L |
| Nov 6, 2005 | Viducich Stiga Pacific Rim OpeTournament · View matches | 1,164 | 1,136 | -28+0 / -28 | 0W / 6L |
| Jun 18, 2005 | 2005 Rose City OpenTournament · View matches · USATT readjusted 1,059 → 1,118 | 1,059 | 1,164 | +46+46 / 0 | 3W / 3L |
| Dec 18, 2004 | 2004 USA Nationals ChampionshipTournament · View matches | 1,023 | 1,059 | +36+41 / -5 | 3W / 8L |
| Nov 14, 2004 | Viducich Stiga Pacific Rim OpenTournament · View matches | 1,023 | 1,023 | 0+0 / 0 | 0W / 3L |
| Jun 13, 2004 | Rose City OpenTournament · View matches | 1,085 | 1,023 | -62+0 / -62 | 2W / 13L |
| Apr 25, 2004 | 2004 Bellevue Spring OpenTournament · View matches | 1,044 | 1,085 | +41 | 3W / 13L |
| Dec 20, 2003 | 2003 USA TT National ChampionshipTournament · View matches | 1,063 | 1,044 | -19+0 / -19 | 1W / 9L |
| Oct 26, 2003 | Viducich Stiga Pacific Rim OpenTournament · View matches | 1,045 | 1,063 | +18+22 / -4 | 2W / 3L |
| Aug 17, 2003 | Portland Summer OpenTournament · View matches | 1,062 | 1,045 | -17+0 / -17 | 0W / 3L |
| Jun 8, 2003 | Paddle Palace 2003 Seattle OpenTournament · View matches | 1,062 | 1,062 | 0+0 / 0 | 0W / 2L |
| May 10, 2003 | Chemeketa Spring OpenTournament · View matches | 1,067 | 1,062 | -5+5 / -10 | 4W / 3L |
| Apr 27, 2003 | Rose City Open TT TournamentTournament · View matches · Initial rating 1,067 | Unrated | 1,067 | — | 0W / 6L |
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