USCF player statistics
Kupferman, Rafael
Official US Chess recordRegular rating
Provisional rating · Sep 2026
Sep 2026
641 provisional
The comparison field
Regular rating in context
United States
of the comparison population has a lower rating.
Where this rating sits
83,635 rated members · 50-point bands
Median falls in
800–849
10,306 members have ratings within 100 points of 641.
Highlighted band: player rating · Dashed line: target rating
600–649: 2,641 members (3.1%). Select a band to explore the distribution.
Explore a target rating
Compare a rating with this published population.
39.2% have ratings below 650.
32,836 of 83,635 members. At 641, the figure is 38.7%.
The population stays fixed. This is a rating comparison, not a prediction of future rank or results.
How these comparisons are calculated
Calculated from the Sep 2026 supplement, using the same population as Chess67’s USCF statistics: US members classified as active by the supplement rules, excluding lifetime-coded records. Includes provisional ratings. These are Chess67 calculations, not official US Chess rankings. “Lower” is strictly lower; ties share a rank. National and state groups overlap. This player is outside that comparison population; no membership rank is assigned.
Published ratings by supplement
All available formats. P indicates a provisional rating.
| Supplement | Regular | Quick |
|---|---|---|
| Sep 2026 | 641 P | 626 P |
| Aug 2026 | 641 P | 626 P |
| Jul 2026 | 641 P | 626 P |
| Jun 2026 | 641 P | 626 P |
| May 2026 | 641 P | 626 P |
| Apr 2026 | 641 P | 626 P |
| Mar 2026 | 641 P | 626 P |
| Feb 2026 | 641 P | 626 P |
| Jan 2026 | 641 P | 626 P |
| Dec 2025 | 641 P | 626 P |
US Chess membership
Register or renew through Chess67. If you already have a USCF ID, use your existing ID when renewing.
Register or renew membershipFind a chess tournament
Browse upcoming events and check each tournament’s sections, rating requirements and registration details.
Find USCF-rated tournaments