USCF player statistics
Petersen, Sidney
Official US Chess record- FIDE
- FIDE 39916146
Regular rating
Published rating · Sep 2026 · 10 published updates since Dec 2025
Other formats against Regular
-187 Quick vs Regular
No national baseline for this rating band yet.
-533 Blitz vs Regular
No national baseline for this rating band yet.
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- +21
- Feb 2026 to Mar 2026
- Biggest drop
- -14
- Aug 2026 to Sep 2026
- Longest rise
- 4 updates
- +58 from Jan 2026 to May 2026
- Updates that moved
- 6 of 9
- Latest -14, Aug 2026 to Sep 2026
- Typical move
- ±8
- Mean absolute change; spread ±11
Regular rating in context
United States
#6,588of 83,635 rated members · higher than 92%
77,021 lower · 27 same rating · 6,587 higher · ties share a rank
North Carolina
#195of 2,742 rated members · higher than 92.8%
2,546 lower · 2 same rating · 194 higher · ties share a rank
Where this rating sits · United States
83,635 rated members in 50-point bands · median 800–849 · 5,073 within 100 points of 1,835 (this player included)
1,800–1,849: 1,567 members (1.8%) · highlighted band is the player’s · dashed line is the target
92.5% below 1,850 (77,390 of 83,635; 92% below 1,835)
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 | Blitz |
|---|---|---|---|
| Sep 2026 | 1,835-14 | 1,648no change | 1,302no change |
| Aug 2026 | 1,849+4 | 1,648no change | 1,302no change |
| Jul 2026 | 1,845no change | 1,648no change | 1,302-1 |
| Jun 2026 | 1,845no change | 1,648no change | 1,303no change |
| May 2026 | 1,845+19 | 1,648no change | 1,303no change |
| Apr 2026 | 1,826+4 | 1,648no change | 1,303no change |
| Mar 2026 | 1,822+21 | 1,648no change | 1,303no change |
| Feb 2026 | 1,801+14 | 1,648no change | 1,303no change |
| Jan 2026 | 1,787no change | 1,648no change | 1,303no change |
| Dec 2025 | 1,787 | 1,648 | 1,303 |