USCF player statistics
Guerra, William Modesto
Official US Chess recordRegular rating
Published rating · Sep 2026 · 10 published updates since Dec 2025
Other formats against Regular
+16 Quick vs Regular
No national baseline for this rating band yet.
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- +115
- Dec 2025 to Jan 2026
- Biggest drop
- -79
- Feb 2026 to Mar 2026
- Longest rise
- 1 update
- +115 from Dec 2025 to Jan 2026
- Current run
- 5 updates
- Unchanged since Apr 2026
- Typical move
- ±23
- Mean absolute change; spread ±49.5
Regular rating in context
United States
#61,822of 83,635 rated members · higher than 26%
21,766 lower · 48 same rating · 61,821 higher · ties share a rank
Texas
#7,120of 10,810 rated members · higher than 34%
3,682 lower · 9 same rating · 7,119 higher · ties share a rank
Where this rating sits · United States
83,635 rated members in 50-point bands · median 800–849 · 10,983 within 100 points of 445 (this player included)
400–449: 2,735 members (3.2%) · highlighted band is the player’s · dashed line is the target
26.3% below 450 (22,043 of 83,635; 26% below 445)
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 | 445no change | 461no change |
| Aug 2026 | 445no change | 461no change |
| Jul 2026 | 445no change | 461no change |
| Jun 2026 | 445no change | 461no change |
| May 2026 | 445no change | 461no change |
| Apr 2026 | 445-13 | 461-12 |
| Mar 2026 | 458 P-79 · 20 games | 473 P-74 · 20 games |
| Feb 2026 | 537 P-1 · 20 games | 547 Pno change · 20 games |
| Jan 2026 | 538 P+115 · 15 games | 547 P+122 · 15 games |
| Dec 2025 | 423 P5 games | 425 P5 games |