Wins
254
Indexed tournament wins
Player record
Guo, Sylvan
Losses
185
Indexed tournament losses
Matches
439
Decisive results
Win rate
57.9%
Across indexed matches
Peak rating
2,213
Highest rating in the available history.
Biggest upset
David Chow
California Open on the 2004 St · Feb 29, 2004 · +589 rating
Open →Biggest loss
Starkey, Marius
San Francisco Summer Open · Aug 21, 2005 · -373 rating
Open →Most frequent opponent
Lily Zhang
13 matches
Open →Rating trajectory
Published rating movement across recorded events.
Tournament history
42 tournament appearances · synced Aug 8, 2026, 2:14 AM
| Date | Tournament | Rating in | Rating after | Points changed | Record |
|---|---|---|---|---|---|
| Feb 18, 2007 | Western OpenTournament · View matches · USATT readjusted 1,740 → 1,809 | 1,740 | 1,855 | +46+54 / -8 | 6W / 2L |
| Dec 16, 2006 | U.S. National ChampionshipsTournament · View matches | 1,726 | 1,740 | +14 | 10W / 10L |
| Nov 5, 2006 | Concord Cup Youth OpenTournament · View matches | 1,696 | 1,726 | +30+43 / -13 | 6W / 3L |
| Oct 22, 2006 | 2006 Stiga NA Tour FinalsTournament · View matches | 1,709 | 1,696 | -13+43 / -56 | 5W / 8L |
| Sep 3, 2006 | 2006 Berkeley OpenTournament · View matches | 1,654 | 1,709 | +55 | 6W / 6L |
| May 28, 2006 | 2006 Golden State OpenTournament · View matches | 1,635 | 1,654 | +19+25 / -6 | 2W / 5L |
| Apr 22, 2006 | Sacramento Spring OpenTournament · View matches | 1,638 | 1,635 | -3+39 / -42 | 6W / 5L |
| Feb 19, 2006 | 2006 Western OpenTournament · View matches | 1,623 | 1,638 | +15+70 / -55 | 17W / 5L |
| Feb 11, 2006 | Sacramento Winter OpenTournament · View matches · USATT readjusted 1,372 → 1,603 | 1,372 | 1,623 | +20+34 / -14 | 16W / 2L |
| Oct 16, 2005 | Western OpenTournament · View matches | 1,376 | 1,372 | -4+13 / -17 | 3W / 9L |
| Oct 2, 2005 | 2005 Concord Cup Youth OpenTournament · View matches | 1,378 | 1,376 | -2+4 / -6 | 4W / 6L |
| Aug 21, 2005 | San Francisco Summer OpenTournament · View matches | 1,377 | 1,378 | +1 | 4W / 8L |
| Apr 30, 2005 | Sacramento Spring OpenTournament · View matches | 1,279 | 1,377 | +98 | 9W / 7L |
| Feb 26, 2005 | Sacramento Winter OpenTournament · View matches | 1,014 | 1,279 | +265 | 10W / 4L |
| Oct 24, 2004 | Concord Cup Youth TT TournamentTournament · View matches | 1,052 | 1,014 | -38+4 / -42 | 2W / 5L |
| Sep 5, 2004 | Western Open on the 2004 StigaTournament · View matches | 1,009 | 1,052 | +43 | 4W / 5L |
| Aug 15, 2004 | San Francisco Summer OpenTournament · View matches | 1,005 | 1,009 | +4 | 4W / 2L |
| May 30, 2004 | Golden State OpenTournament · View matches | 984 | 1,005 | +21+25 / -4 | 5W / 4L |
| Apr 10, 2004 | Sacramento Spring OpenTournament · View matches | 859 | 984 | +125 | 6W / 3L |
| Feb 29, 2004 | California Open on the 2004 StTournament · View matches | 407 | 859 | +452 | 8W / 3L |