USCF player statistics
Yam, Aaron
Official US Chess recordRegular rating
Published rating · Sep 2026 · 10 published updates since Dec 2025
Other formats against Regular
-89 Quick vs Regular
No national baseline for this rating band yet.
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- +102
- Dec 2025 to Jan 2026
- Biggest drop
- -53
- Aug 2026 to Sep 2026
- Longest rise
- 1 update
- +102 from Dec 2025 to Jan 2026
- Updates that moved
- 5 of 9
- Latest -53, Aug 2026 to Sep 2026
- Typical move
- ±25
- Mean absolute change; spread ±41.2
Regular rating in context
United States
#33,017of 83,635 rated members · higher than 60.4%
50,576 lower · 43 same rating · 33,016 higher · ties share a rank
California
#3,856of 9,051 rated members · higher than 57.3%
5,192 lower · 4 same rating · 3,855 higher · ties share a rank
Where this rating sits · United States
83,635 rated members in 50-point bands · median 800–849 · 7,780 within 100 points of 1,047 (this player included)
1,000–1,049: 1,959 members (2.3%) · highlighted band is the player’s · dashed line is the target
60.6% below 1,050 (50,700 of 83,635; 60.4% below 1,047)
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 | 1,047-53 | 958-53 |
| Aug 2026 | 1,100+29 | 1,011+17 |
| Jul 2026 | 1,071no change | 994no change |
| Jun 2026 | 1,071no change | 994no change |
| May 2026 | 1,071+32 | 994no change |
| Apr 2026 | 1,039no change | 994no change |
| Mar 2026 | 1,039+10 | 994+9 |
| Feb 2026 | 1,029no change | 985no change |
| Jan 2026 | 1,029+102 | 985+107 |
| Dec 2025 | 927 | 878 |