USCF player statistics
Ko, Jasper
Official US Chess record- FIDE
- FIDE 0
Regular rating
Published rating · Sep 2026 · 10 published updates since Dec 2025
Other formats against Regular
0 Quick vs Regular
No national baseline for this rating band yet.
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- +44
- Dec 2025 to Jan 2026
- Biggest drop
- -30
- Mar 2026 to Apr 2026
- Longest rise
- 1 update
- +44 from Dec 2025 to Jan 2026
- Current run
- 3 updates
- Unchanged since Jun 2026
- Typical move
- ±10
- Mean absolute change; spread ±19.3
Regular rating in context
United States
#77,416of 83,635 rated members · higher than 7.3%
6,170 lower · 50 same rating · 77,415 higher · ties share a rank
California
#8,478of 9,051 rated members · higher than 6.3%
571 lower · 3 same rating · 8,477 higher · ties share a rank
Where this rating sits · United States
83,635 rated members in 50-point bands · median 800–849 · 11,010 within 100 points of 141 (this player included)
100–149: 6,615 members (7.9%) · highlighted band is the player’s · dashed line is the target
7.9% below 150 (6,615 of 83,635; 7.3% below 141)
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 | 141no change | 141no change |
| Aug 2026 | 141no change | 141no change |
| Jul 2026 | 141no change | 141no change |
| Jun 2026 | 141 P+16 · 22 games | 141 P+16 · 22 games |
| May 2026 | 125 Pno change · 16 games | 125 Pno change · 16 games |
| Apr 2026 | 125 P-30 · 16 games | 125 P-31 · 16 games |
| Mar 2026 | 155 Pno change · 10 games | 156 Pno change · 10 games |
| Feb 2026 | 155 Pno change · 10 games | 156 Pno change · 10 games |
| Jan 2026 | 155 P+44 · 10 games | 156 P+45 · 10 games |
| Dec 2025 | 111 P10 games | 111 P10 games |