USCF player statistics
Ahn, Marcus
Official US Chess record- Biggest rank climb · #43 in Colorado (Online Quick)
- Biggest rank climb · #14 in Colorado (Online Regular)
- Biggest rank climb · #66 in Colorado (Regular)
- Top rated · #90 in Colorado (Online Quick)
- Top rated · #65 in Colorado (Online Regular)
- FIDE
- FIDE 0
Regular rating
Published rating · Sep 2026 · 10 published updates since Dec 2025
Other formats against Regular
-5 Quick vs Regular
No national baseline for this rating band yet.
-459 Online Regular vs Regular (provisional)
No national baseline for this rating band yet.
-335 Online Quick vs Regular
No national baseline for this rating band yet.
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- +1
- Mar 2026 to Apr 2026
- Biggest drop
- -1
- Jan 2026 to Feb 2026
- Longest rise
- 1 update
- +1 from Mar 2026 to Apr 2026
- Current run
- 5 updates
- Unchanged since Apr 2026
- Typical move
- ±0
- Mean absolute change; spread ±0.5
Regular rating in context
United States
#55,388of 83,635 rated members · higher than 33.6%
28,182 lower · 66 same rating · 55,387 higher · ties share a rank
Colorado
#832of 1,027 rated members · higher than 18.9%
195 lower · 1 same rating · 831 higher · ties share a rank
Where this rating sits · United States
83,635 rated members in 50-point bands · median 800–849 · 10,798 within 100 points of 562 (this player included)
550–599: 2,691 members (3.2%) · highlighted band is the player’s · dashed line is the target
36.1% below 600 (30,195 of 83,635; 33.6% below 562)
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 | Online Regular | Online Quick |
|---|---|---|---|---|
| Sep 2026 | 562no change | 557no change | 103 Pno change · 17 games | 227no change |
| Aug 2026 | 562no change | 557no change | 103 Pno change · 17 games | 227no change |
| Jul 2026 | 562no change | 557no change | 103 Pno change · 17 games | 227no change |
| Jun 2026 | 562no change | 557no change | 103 Pno change · 17 games | 227no change |
| May 2026 | 562no change | 557no change | 103 Pno change · 17 games | 227no change |
| Apr 2026 | 562+1 | 557+1 | 103 Pno change · 17 games | 227no change |
| Mar 2026 | 561no change | 556no change | 103 Pno change · 17 games | 227no change |
| Feb 2026 | 561-1 | 556-1 | 103 Pno change · 17 games | 227no change |
| Jan 2026 | 562no change | 557no change | 103 Pno change · 17 games | 227no change |
| Dec 2025 | 562 | 557 | 103 P17 games | 227 |