USCF player statistics
Ma, Sean
Official US Chess record- FIDE
- FIDE 39900150
Regular rating
Published rating · Sep 2026 · 10 published updates since Dec 2025
Other formats against Regular
-263 Quick vs Regular
No national baseline for this rating band yet.
-508 Blitz vs Regular (provisional)
No national baseline for this rating band yet.
-191 Online Regular vs Regular
No national baseline for this rating band yet.
-352 Online Quick vs Regular (provisional)
No national baseline for this rating band yet.
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- —
- No gain between published updates yet
- Biggest drop
- —
- No drop between published updates yet
- Longest rise
- —
- No consecutive gains yet
- Current run
- 9 updates
- Unchanged since Dec 2025
- Typical move
- ±0
- Mean absolute change; spread ±0
Regular rating in context
United States
84.1%of the comparison population has a lower rating.
70,400 lower · 40 same rating · 13,195 higher
Where this rating sits · United States
83,635 rated members in 50-point bands · median 800–849 · 6,657 within 100 points of 1,615
1,600–1,649: 1,832 members (2.1%) · highlighted band is the player’s · dashed line is the target
85.5% below 1,650 (71,512 of 83,635; 84.1% below 1,615)
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: it is a rating comparison, not a prediction of future rank. This player is outside that comparison population; no membership rank is assigned.
Published ratings by month
P marks a provisional rating; the small figure is the change since the previous published observation.
| Month | Regular | Quick | Blitz | Online Regular | Online Quick |
|---|---|---|---|---|---|
| Sep 2026 | 1,615no change | 1,352no change | 1,107 Pno change · 22 games | 1,424no change | 1,263 Pno change · 17 games |
| Aug 2026 | 1,615no change | 1,352no change | 1,107 Pno change · 22 games | 1,424no change | 1,263 Pno change · 17 games |
| Jul 2026 | 1,615no change | 1,352no change | 1,107 Pno change · 22 games | 1,424no change | 1,263 Pno change · 17 games |
| Jun 2026 | 1,615no change | 1,352no change | 1,107 Pno change · 22 games | 1,424no change | 1,263 Pno change · 17 games |
| May 2026 | 1,615no change | 1,352no change | 1,107 Pno change · 22 games | 1,424no change | 1,263 Pno change · 17 games |
| Apr 2026 | 1,615no change | 1,352no change | 1,107 Pno change · 22 games | 1,424no change | 1,263 Pno change · 17 games |
| Mar 2026 | 1,615no change | 1,352no change | 1,107 Pno change · 22 games | 1,424no change | 1,263 Pno change · 17 games |
| Feb 2026 | 1,615no change | 1,352no change | 1,107 Pno change · 22 games | 1,424no change | 1,263 Pno change · 17 games |
| Jan 2026 | 1,615no change | 1,352no change | 1,107 Pno change · 22 games | 1,424no change | 1,263 Pno change · 17 games |
| Dec 2025 | 1,615 | 1,352 | 1,107 P22 games | 1,424 | 1,263 P17 games |