USCF player statistics
Ahn, Seung
- Gender
- Male
- US Chess reported rank
- #54,320 national · #378 in state
- Floor
- Regular 121 · Quick 130
- Rated games
- Regular 14 · Quick 19
US Chess record as of Sep 17, 2026
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- +62
- Oct 2026 to Nov 2026
- Biggest drop
- -23
- Aug 2026 to Sep 2026
- Longest rise
- 1 update
- +62 from Oct 2026 to Nov 2026
- Updates that moved
- 4 of 11
- Latest +62, Oct 2026 to Nov 2026
- Typical move
- ±8
- Mean absolute change; spread ±20.6
Regular rating in context
United States
#59,867of 83,032 rated members · higher than 27.8%
23,110 lower · 56 same rating · 59,866 higher · ties share a rank
Alabama
#450of 602 rated members · higher than 25%
151 lower · 2 same rating · 449 higher · ties share a rank
Where this rating sits · United States
83,032 rated members in 50-point bands · median 850–899 · 10,722 within 100 points of 478 (this player included)
450–499: 2,670 members (3.2%) · highlighted band is the player’s · dashed line is the target
29.1% below 500 (24,225 of 83,032; 27.8% below 478)
Percentile over time · United States
27.8% higher than · Nov 2026 · rank #59,867 of 83,032
Since Dec 2025
+2 pts
How these comparisons are calculated
Chess67 calculations from the Nov 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 |
|---|---|---|
| Nov 2026 | 478 P+62 · 18 games | 528 P+6 · 23 games |
| Oct 2026 | 416 Pno change · 14 games | 522 Pno change · 19 games |
| Sep 2026 | 416 P-23 · 14 games | 522 P-41 · 19 games |
| Aug 2026 | 439 Pno change · 12 games | 563 Pno change · 17 games |
| Jul 2026 | 439 Pno change · 12 games | 563 P+138 · 17 games |
| Jun 2026 | 439 Pno change · 12 games | 425 Pno change · 12 games |
| May 2026 | 439 Pno change · 12 games | 425 Pno change · 12 games |
| Apr 2026 | 439 Pno change · 12 games | 425 Pno change · 12 games |
| Mar 2026 | 439 Pno change · 12 games | 425 Pno change · 12 games |
| Feb 2026 | 439 P-1 · 12 games | 425 P-1 · 12 games |
| Jan 2026 | 440 P+1 · 12 games | 426 P+1 · 12 games |
| Dec 2025 | 439 P12 games | 425 P12 games |