USCF player statistics
Koberstein, Ada
Official US Chess recordRegular rating
Provisional rating · Sep 2026 · 4 published updates since Jun 2026
Other formats against Regular
-2 Quick vs Regular (provisional)
No national baseline for this rating band yet.
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- —
- No gain between published updates yet
- Biggest drop
- -12
- Jun 2026 to Jul 2026
- Longest rise
- —
- No consecutive gains yet
- Current run
- 2 updates
- Unchanged since Jul 2026
- Typical move
- ±4
- Mean absolute change; spread ±6.9
Regular rating in context
United States
#73,931of 83,635 rated members · higher than 11.5%
9,664 lower · 41 same rating · 73,930 higher · ties share a rank
California
#8,168of 9,051 rated members · higher than 9.6%
877 lower · 7 same rating · 8,167 higher · ties share a rank
Where this rating sits · United States
83,635 rated members in 50-point bands · median 800–849 · 10,120 within 100 points of 214 (this player included)
200–249: 2,417 members (2.8%) · highlighted band is the player’s · dashed line is the target
13.6% below 250 (11,415 of 83,635; 11.5% below 214)
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 | 214 Pno change · 4 games | 212 Pno change · 4 games |
| Aug 2026 | 214 Pno change · 4 games | 212 Pno change · 4 games |
| Jul 2026 | 214 P-12 · 4 games | 212 P-13 · 4 games |
| Jun 2026 | 226 P4 games | 225 P4 games |
| May 2026 | — | — |
| Apr 2026 | — | — |
| Mar 2026 | — | — |
| Feb 2026 | — | — |