USCF player statistics
Kolar, Sofia
Official US Chess recordRegular rating
Published rating · Sep 2026 · 10 published updates since Dec 2025
Other formats against Regular
-32 Quick vs Regular
No national baseline for this rating band yet.
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- +183
- Jun 2026 to Jul 2026
- Biggest drop
- -89
- Jan 2026 to Feb 2026
- Longest rise
- 6 updates
- +454 from Feb 2026 to Aug 2026
- Updates that moved
- 9 of 9
- Latest -50, Aug 2026 to Sep 2026
- Typical move
- ±73
- Mean absolute change; spread ±81.8
Regular rating in context
United States
#42,759of 83,635 rated members · higher than 48.8%
40,829 lower · 48 same rating · 42,758 higher · ties share a rank
California
#4,918of 9,051 rated members · higher than 45.5%
4,126 lower · 8 same rating · 4,917 higher · ties share a rank
Where this rating sits · United States
83,635 rated members in 50-point bands · median 800–849 · 9,142 within 100 points of 816 (this player included)
800–849: 2,310 members (2.7%) · highlighted band is the player’s · dashed line is the target
50.6% below 850 (42,370 of 83,635; 48.8% below 816)
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 | 816-50 | 784-48 |
| Aug 2026 | 866+10 | 832+11 |
| Jul 2026 | 856+183 | 821+181 |
| Jun 2026 | 673+42 | 640+199 |
| May 2026 | 631+120 | 441-66 |
| Apr 2026 | 511+38 | 507+39 |
| Mar 2026 | 473+61 | 468+65 |
| Feb 2026 | 412-89 | 403-91 |
| Jan 2026 | 501+65 | 494+64 |
| Dec 2025 | 436 | 430 |