USCF player statistics
Sosa, Sebastian
Official US Chess recordQuick rating
Provisional rating · Sep 2026 · 10 published updates since Dec 2025
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
Quick rating in context
United States
42.6%of the comparison population has a lower rating.
33,681 lower · 58 same rating · 45,280 higher
Where this rating sits · United States
79,019 rated members in 50-point bands · median 750–799 · 10,653 within 100 points of 651
650–699: 2,620 members (3.3%) · highlighted band is the player’s · dashed line is the target
45.8% below 700 (36,247 of 79,019; 42.6% below 651)
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 | Quick |
|---|---|
| Sep 2026 | 651 Pno change · 6 games |
| Aug 2026 | 651 Pno change · 6 games |
| Jul 2026 | 651 Pno change · 6 games |
| Jun 2026 | 651 Pno change · 6 games |
| May 2026 | 651 Pno change · 6 games |
| Apr 2026 | 651 Pno change · 6 games |
| Mar 2026 | 651 Pno change · 6 games |
| Feb 2026 | 651 Pno change · 6 games |
| Jan 2026 | 651 Pno change · 6 games |
| Dec 2025 | 651 P6 games |