USCF player statistics
Guan, Isabelle
Regular rating
Provisional rating · Sep 2026 · 9 published updates since Jan 2026
Other formats against Regular
-9 Quick vs Regular (provisional)
No national baseline for this rating band yet.
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- +107
- Jul 2026 to Aug 2026
- Biggest drop
- -45
- Jun 2026 to Jul 2026
- Longest rise
- 1 update
- +107 from Jul 2026 to Aug 2026
- Current run
- 1 update
- Unchanged since Aug 2026
- Typical move
- ±26
- Mean absolute change; spread ±45.6
Regular rating in context
United States
11.8%of the comparison population has a lower rating.
9,898 lower · 48 same rating · 73,689 higher
Where this rating sits · United States
83,635 rated members in 50-point bands · median 800–849 · 9,980 within 100 points of 219
200–249: 2,417 members (2.8%) · highlighted band is the player’s · dashed line is the target
13.6% below 250 (11,415 of 83,635; 11.8% below 219)
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 |
|---|---|---|
| Sep 2026 | 219 Pno change · 21 games | 210 Pno change · 21 games |
| Aug 2026 | 219 P+107 · 21 games | 210 P+98 · 21 games |
| Jul 2026 | 112 P-45 · 17 games | 112 P-41 · 17 games |
| Jun 2026 | 157 P+52 · 13 games | 153 P+48 · 13 games |
| May 2026 | 105 Pno change · 5 games | 105 Pno change · 5 games |
| Apr 2026 | 105 Pno change · 5 games | 105 Pno change · 5 games |
| Mar 2026 | 105 Pno change · 5 games | 105 Pno change · 5 games |
| Feb 2026 | 105 Pno change · 5 games | 105 Pno change · 5 games |
| Jan 2026 | 105 P5 games | 105 P5 games |
| Dec 2025 | — | — |