USCF player statistics
Grunberg, Zachary
Official US Chess recordRegular rating
Provisional rating · Sep 2026
Sep 2026
323 provisional
The comparison field
Regular rating in context
United States
Among 83,635 rated members; tied ratings share a rank.
Higher than 18% of ratings in this population.
Maryland
Among 1,878 rated members; tied ratings share a rank.
Higher than 18.3% of ratings in this population.
Where this rating sits
83,635 rated members · 50-point bands
Median falls in
800–849
10,530 members have ratings within 100 points of 323, including this player.
Highlighted band: player rating · Dashed line: target rating
300–349: 2,672 members (3.1%). Select a band to explore the distribution.
Explore a target rating
Compare a rating with this published population.
19.8% have ratings below 350.
16,619 of 83,635 members. At 323, the figure is 18%.
The population stays fixed. This is a rating comparison, not a prediction of future rank or results. The published population includes this player at their recorded rating.
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.
Published ratings by supplement
All available formats. P indicates a provisional rating.
| Supplement | Regular | Quick |
|---|---|---|
| Sep 2026 | 323 P | 319 P |
| Aug 2026 | 424 P | 423 P |
| Jul 2026 | 424 P | 423 P |
| Jun 2026 | 424 P | 423 P |
| May 2026 | — | — |
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