USCF player statistics
Amato, Zephyr Raia
Official US Chess recordRegular rating
Provisional rating · Sep 2026 · 10 published updates since Dec 2025
Other formats against Regular
+1 Quick vs Regular (provisional)
No national baseline for this rating band yet.
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- +1
- Jan 2026 to Feb 2026
- Biggest drop
- -13
- Jun 2026 to Jul 2026
- Longest rise
- 1 update
- +1 from Jan 2026 to Feb 2026
- Current run
- 2 updates
- Unchanged since Jul 2026
- Typical move
- ±2
- Mean absolute change; spread ±4.4
Regular rating in context
United States
7.4%of the comparison population has a lower rating.
6,265 lower · 52 same rating · 77,318 higher
California
6.3%of the comparison population has a lower rating.
579 lower · 6 same rating · 8,466 higher
Where this rating sits · United States
83,635 rated members in 50-point bands · median 800–849 · 11,105 within 100 points of 143
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; 7.4% below 143)
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: it is a rating comparison, not a prediction of future rank. This player is outside that comparison population; no membership rank is assigned.
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 | 143 Pno change · 12 games | 144 Pno change · 12 games |
| Aug 2026 | 143 Pno change · 12 games | 144 Pno change · 12 games |
| Jul 2026 | 143 P-13 · 12 games | 144 P-12 · 12 games |
| Jun 2026 | 156 Pno change · 9 games | 156 Pno change · 9 games |
| May 2026 | 156 Pno change · 9 games | 156 Pno change · 9 games |
| Apr 2026 | 156 P-1 · 9 games | 156 P-1 · 9 games |
| Mar 2026 | 157 Pno change · 9 games | 157 Pno change · 9 games |
| Feb 2026 | 157 P+1 · 9 games | 157 P+1 · 9 games |
| Jan 2026 | 156 Pno change · 9 games | 156 Pno change · 9 games |
| Dec 2025 | 156 P9 games | 156 P9 games |