Wins
66
Indexed tournament wins
Player record
Yam, Bosco
Losses
52
Indexed tournament losses
Matches
118
Decisive results
Win rate
55.9%
Across indexed matches
Peak rating
1,752
Highest rating in the available history.
Biggest upset
William Y. Wong
Sacramento Summer Open · Aug 27, 2016 · +439 rating
Open →Biggest loss
Che, Tiger
California State Championship · May 6, 2016 · -602 rating
Open →Most frequent opponent
Jose Fernandez
3 matches
Open →Rating trajectory
Published rating movement across recorded events.
Tournament history
24 tournament appearances · synced Aug 11, 2026, 2:19 AM
| Date | Tournament | Rating in | Rating after | Points changed | Record |
|---|---|---|---|---|---|
| Aug 15, 2004 | San Francisco Summer OpenTournament · View matches | 924 | 970 | +46+50 / -4 | 4W / 2L |
| May 30, 2004 | Golden State OpenTournament · View matches | 915 | 924 | +9+10 / -1 | 2W / 1L |
| Apr 10, 2004 | Sacramento Spring OpenTournament · View matches · USATT readjusted 694 → 885 | 694 | 915 | +30+30 / 0 | 7W / 1L |
| Feb 7, 2004 | Sacramento Winter OpenTournament · View matches · Initial rating 694 | Unrated | 694 | — | 3W / 1L |
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