USCF player statistics
Mulcahy, William
Official US Chess recordRegular rating
Published rating · Sep 2026 · 10 published updates since Dec 2025
Other formats against Regular
+18 Quick vs Regular (provisional)
No national baseline for this rating band yet.
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- +66
- Feb 2026 to Mar 2026
- Biggest drop
- -155
- Aug 2026 to Sep 2026
- Longest rise
- 1 update
- +66 from Feb 2026 to Mar 2026
- Updates that moved
- 3 of 9
- Latest -155, Aug 2026 to Sep 2026
- Typical move
- ±28
- Mean absolute change; spread ±59
Regular rating in context
United States
#58,180of 83,635 rated members · higher than 30.3%
25,407 lower · 49 same rating · 58,179 higher · ties share a rank
Virginia
#1,893of 2,595 rated members · higher than 27%
701 lower · 2 same rating · 1,892 higher · ties share a rank
Where this rating sits · United States
83,635 rated members in 50-point bands · median 800–849 · 10,969 within 100 points of 511 (this player included)
500–549: 2,741 members (3.2%) · highlighted band is the player’s · dashed line is the target
32.8% below 550 (27,504 of 83,635; 30.3% below 511)
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 | 511-155 | 529 P-171 · 23 games |
| Aug 2026 | 666 Pno change · 20 games | 700 Pno change · 15 games |
| Jul 2026 | 666 Pno change · 20 games | 700 Pno change · 15 games |
| Jun 2026 | 666 Pno change · 20 games | 700 Pno change · 15 games |
| May 2026 | 666 Pno change · 20 games | 700 Pno change · 15 games |
| Apr 2026 | 666 P-34 · 20 games | 700 Pno change · 15 games |
| Mar 2026 | 700 P+66 · 15 games | 700 P+68 · 15 games |
| Feb 2026 | 634 Pno change · 15 games | 632 Pno change · 15 games |
| Jan 2026 | 634 Pno change · 12 games | 632 Pno change · 12 games |
| Dec 2025 | 634 P12 games | 632 P12 games |