USCF player statistics
Brock, Sierra
- Gender
- Female
- US Chess reported rank
- #44,865 national · #1,751 in state
- Floor
- Regular 132
- Rated games
- Regular 5
US Chess record as of Sep 18, 2026
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- +649
- Sep 2026 to Oct 2026
- Biggest drop
- —
- No drop between published updates yet
- Longest rise
- 1 update
- +649 from Sep 2026 to Oct 2026
- Updates that moved
- 1 of 1
- Latest +649, Sep 2026 to Oct 2026
- Typical move
- ±649
- Mean absolute change per update
Regular rating in context
United States
#25,871of 82,596 rated members · higher than 68.6%
56,689 lower · 37 same rating · 25,870 higher · ties share a rank
New Jersey
#1,071of 3,069 rated members · higher than 65%
1,997 lower · 2 same rating · 1,070 higher · ties share a rank
Where this rating sits · United States
82,596 rated members in 50-point bands · median 800–849 · 6,918 within 100 points of 1,248 (this player included)
1,200–1,249: 1,811 members (2.1%) · highlighted band is the player’s · dashed line is the target
68.7% below 1,250 (56,755 of 82,596; 68.6% below 1,248)
Percentile over time · United States
68.6% higher than · Oct 2026 · rank #25,871 of 82,596
Since Sep 2026
+32.6 pts
How these comparisons are calculated
Chess67 calculations from the Oct 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 |
|---|---|
| Oct 2026 | 1,248 P+649 · 11 games |
| Sep 2026 | 599 P5 games |
| Aug 2026 | — |