USCF player statistics
Sewall, Isabella
Official US Chess record- FIDE
- FIDE 0
Regular rating
Published rating · Sep 2026 · 10 published updates since Dec 2025
Other formats against Regular
+23 Quick vs Regular
No national baseline for this rating band yet.
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- +5
- Jan 2026 to Feb 2026
- Biggest drop
- -1
- Dec 2025 to Jan 2026
- Longest rise
- 1 update
- +5 from Jan 2026 to Feb 2026
- Current run
- 7 updates
- Unchanged since Feb 2026
- Typical move
- ±1
- Mean absolute change; spread ±1.7
Regular rating in context
United States
#64,104of 83,635 rated members · higher than 23.2%
19,479 lower · 53 same rating · 64,103 higher · ties share a rank
Texas
#7,483of 10,810 rated members · higher than 30.6%
3,317 lower · 11 same rating · 7,482 higher · ties share a rank
Where this rating sits · United States
83,635 rated members in 50-point bands · median 800–849 · 10,893 within 100 points of 403 (this player included)
400–449: 2,735 members (3.2%) · highlighted band is the player’s · dashed line is the target
26.3% below 450 (22,043 of 83,635; 23.2% below 403)
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 | 403no change | 426no change |
| Aug 2026 | 403no change | 426no change |
| Jul 2026 | 403no change | 426no change |
| Jun 2026 | 403no change | 426no change |
| May 2026 | 403no change | 426no change |
| Apr 2026 | 403no change | 426no change |
| Mar 2026 | 403no change | 426+1 |
| Feb 2026 | 403+5 | 425+4 |
| Jan 2026 | 398-1 | 421-1 |
| Dec 2025 | 399 | 422 |