USCF player statistics
Mendez, Guillermo
Official US Chess recordRegular rating
Published rating · Sep 2026 · 10 published updates since Dec 2025
Other formats against Regular
+81 Quick vs Regular (provisional)
No national baseline for this rating band yet.
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- +253
- Mar 2026 to Apr 2026
- Biggest drop
- -66
- May 2026 to Jun 2026
- Longest rise
- 1 update
- +253 from Mar 2026 to Apr 2026
- Current run
- 3 updates
- Unchanged since Jun 2026
- Typical move
- ±45
- Mean absolute change; spread ±94.4
Regular rating in context
United States
#59,354of 83,635 rated members · higher than 28.9%
24,225 lower · 57 same rating · 59,353 higher · ties share a rank
Texas
#6,762of 10,810 rated members · higher than 37.3%
4,039 lower · 10 same rating · 6,761 higher · ties share a rank
Where this rating sits · United States
83,635 rated members in 50-point bands · median 800–849 · 10,973 within 100 points of 490 (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; 28.9% below 490)
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 | 490no change | 571 Pno change · 20 games |
| Aug 2026 | 490no change | 571 Pno change · 20 games |
| Jul 2026 | 490no change | 571 Pno change · 20 games |
| Jun 2026 | 490-66 | 571 Pno change · 20 games |
| May 2026 | 556 Pno change · 20 games | 571 Pno change · 20 games |
| Apr 2026 | 556 P+253 · 20 games | 571 P+257 · 20 games |
| Mar 2026 | 303 P-34 · 12 games | 314 P-38 · 12 games |
| Feb 2026 | 337 Pno change · 12 games | 352 Pno change · 12 games |
| Jan 2026 | 337 P-54 · 7 games | 352 P-39 · 7 games |
| Dec 2025 | 391 P4 games | 391 P4 games |