USCF player statistics
Su, Eric Yinwen
Official US Chess recordRegular rating
Provisional rating · Sep 2026 · 6 published updates since Apr 2026
Other formats against Regular
-26 Quick vs Regular (provisional)
No national baseline for this rating band yet.
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- +43
- Aug 2026 to Sep 2026
- Biggest drop
- —
- No drop between published updates yet
- Longest rise
- 1 update
- +43 from Aug 2026 to Sep 2026
- Updates that moved
- 1 of 5
- Latest +43, Aug 2026 to Sep 2026
- Typical move
- ±9
- Mean absolute change; spread ±19.2
Regular rating in context
United States
#54,561of 83,635 rated members · higher than 34.7%
29,026 lower · 49 same rating · 54,560 higher · ties share a rank
California
#6,188of 9,051 rated members · higher than 31.5%
2,859 lower · 5 same rating · 6,187 higher · ties share a rank
Where this rating sits · United States
83,635 rated members in 50-point bands · median 800–849 · 10,663 within 100 points of 578 (this player included)
550–599: 2,691 members (3.2%) · highlighted band is the player’s · dashed line is the target
36.1% below 600 (30,195 of 83,635; 34.7% below 578)
How these comparisons are calculated
Chess67 calculations from the Sep 2026 monthly rating update, using the same population as the USCF statistics pages: US members classified as active in the published monthly records, excluding lifetime-coded records, provisional ratings included. Ties share a rank; “lower” is strictly lower; national and state groups overlap. The target explorer keeps the population fixed, with this player at their recorded rating: it is a rating comparison, not a prediction of future rank.
Published ratings by month
P marks a provisional rating; the small figure is the change since the previous published observation.
| Month | Regular | Quick |
|---|---|---|
| Sep 2026 | 578 P+43 · 11 games | 552 P+42 · 11 games |
| Aug 2026 | 535 Pno change · 8 games | 510 Pno change · 8 games |
| Jul 2026 | 535 Pno change · 8 games | 510 Pno change · 8 games |
| Jun 2026 | 535 Pno change · 8 games | 510 Pno change · 8 games |
| May 2026 | 535 Pno change · 8 games | 510 Pno change · 8 games |
| Apr 2026 | 535 P8 games | 510 P8 games |