USCF player statistics
Armstrong, Sydney
Official US Chess recordRegular rating
Published rating · Sep 2026 · 10 published updates since Dec 2025
Other formats against Regular
+9 Quick vs Regular
No national baseline for this rating band yet.
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- +65
- Apr 2026 to May 2026
- Biggest drop
- -150
- Jul 2026 to Aug 2026
- Longest rise
- 2 updates
- +115 from Mar 2026 to May 2026
- Current run
- 1 update
- Unchanged since Aug 2026
- Typical move
- ±34
- Mean absolute change; spread ±61.3
Regular rating in context
United States
#58,873of 83,635 rated members · higher than 29.5%
24,706 lower · 57 same rating · 58,872 higher · ties share a rank
Pennsylvania
#1,982of 2,639 rated members · higher than 24.7%
654 lower · 4 same rating · 1,981 higher · ties share a rank
Where this rating sits · United States
83,635 rated members in 50-point bands · median 800–849 · 10,961 within 100 points of 499 (this player included)
450–499: 2,720 members (3.2%) · highlighted band is the player’s · dashed line is the target
29.6% below 500 (24,763 of 83,635; 29.5% below 499)
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 | 499no change | 508-2 |
| Aug 2026 | 499-150 | 510-148 |
| Jul 2026 | 649no change | 658+10 |
| Jun 2026 | 649no change | 648no change |
| May 2026 | 649+65 | 648+65 |
| Apr 2026 | 584+50 | 583+34 |
| Mar 2026 | 534no change | 549+1 |
| Feb 2026 | 534+3 | 548-4 |
| Jan 2026 | 531-36 | 552-41 |
| Dec 2025 | 567 | 593 |