USCF player statistics
Stupak, William
Official US Chess record- FIDE
- FIDE 0
Regular rating
Provisional rating · Sep 2026 · 6 published updates since Apr 2026
Other formats against Regular
+22 Quick vs Regular (provisional)
No national baseline for this rating band yet.
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- —
- No gain between published updates yet
- Biggest drop
- —
- No drop between published updates yet
- Longest rise
- —
- No consecutive gains yet
- Current run
- 5 updates
- Unchanged since Apr 2026
- Typical move
- ±0
- Mean absolute change; spread ±0
Regular rating in context
United States
#39,909of 83,635 rated members · higher than 52.2%
43,683 lower · 44 same rating · 39,908 higher · ties share a rank
California
#4,614of 9,051 rated members · higher than 48.9%
4,431 lower · 7 same rating · 4,613 higher · ties share a rank
Where this rating sits · United States
83,635 rated members in 50-point bands · median 800–849 · 8,833 within 100 points of 879 (this player included)
850–899: 2,189 members (2.6%) · highlighted band is the player’s · dashed line is the target
53.2% below 900 (44,559 of 83,635; 52.2% below 879)
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 | 879 Pno change · 4 games | 901 Pno change · 4 games |
| Aug 2026 | 879 Pno change · 4 games | 901 Pno change · 4 games |
| Jul 2026 | 879 Pno change · 4 games | 901 Pno change · 4 games |
| Jun 2026 | 879 Pno change · 4 games | 901 Pno change · 4 games |
| May 2026 | 879 Pno change · 4 games | 901 Pno change · 4 games |
| Apr 2026 | 879 P4 games | 901 P4 games |