USCF player statistics
Riordan, Isabelle
Official US Chess recordRegular rating
Provisional rating · Sep 2026 · 10 published updates since Dec 2025
Other formats against Regular
-6 Quick vs Regular (provisional)
No national baseline for this rating band yet.
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- +38
- Mar 2026 to Apr 2026
- Biggest drop
- —
- No drop between published updates yet
- Longest rise
- 1 update
- +38 from Mar 2026 to Apr 2026
- Current run
- 5 updates
- Unchanged since Apr 2026
- Typical move
- ±4
- Mean absolute change; spread ±12.7
Regular rating in context
United States
#69,545of 83,635 rated members · higher than 16.7%
14,035 lower · 56 same rating · 69,544 higher · ties share a rank
Illinois
#3,647of 4,678 rated members · higher than 21.9%
1,028 lower · 4 same rating · 3,646 higher · ties share a rank
Where this rating sits · United States
83,635 rated members in 50-point bands · median 800–849 · 10,397 within 100 points of 302 (this player included)
300–349: 2,672 members (3.1%) · highlighted band is the player’s · dashed line is the target
19.8% below 350 (16,619 of 83,635; 16.7% below 302)
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 | 302 Pno change · 9 games | 296 Pno change · 9 games |
| Aug 2026 | 302 Pno change · 9 games | 296 Pno change · 9 games |
| Jul 2026 | 302 Pno change · 9 games | 296 Pno change · 9 games |
| Jun 2026 | 302 Pno change · 9 games | 296 Pno change · 9 games |
| May 2026 | 302 Pno change · 9 games | 296 Pno change · 9 games |
| Apr 2026 | 302 P+38 · 9 games | 296 P+39 · 9 games |
| Mar 2026 | 264 Pno change · 4 games | 257 Pno change · 4 games |
| Feb 2026 | 264 Pno change · 4 games | 257 Pno change · 4 games |
| Jan 2026 | 264 Pno change · 4 games | 257 Pno change · 4 games |
| Dec 2025 | 264 P4 games | 257 P4 games |