USCF player statistics
Derew, William
Official US Chess recordRegular rating
Published rating · Sep 2026 · 10 published updates since Dec 2025
Other formats against Regular
-7 Quick vs Regular
No national baseline for this rating band yet.
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- +123
- Jan 2026 to Feb 2026
- Biggest drop
- -21
- Mar 2026 to Apr 2026
- Longest rise
- 3 updates
- +266 from Dec 2025 to Mar 2026
- Current run
- 4 updates
- Unchanged since May 2026
- Typical move
- ±32
- Mean absolute change; spread ±53.8
Regular rating in context
United States
27.9%of the comparison population has a lower rating.
23,346 lower · 52 same rating · 60,237 higher
Where this rating sits · United States
83,635 rated members in 50-point bands · median 800–849 · 10,948 within 100 points of 474
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; 27.9% below 474)
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 | 474no change | 467no change |
| Aug 2026 | 474no change | 467+1 |
| Jul 2026 | 474no change | 466no change |
| Jun 2026 | 474no change | 466no change |
| May 2026 | 474-1 | 466-1 |
| Apr 2026 | 475-21 | 467-28 |
| Mar 2026 | 496+116 | 495+115 |
| Feb 2026 | 380+123 | 380+124 |
| Jan 2026 | 257+27 | 256+26 |
| Dec 2025 | 230 | 230 |