USCF player statistics
Cullen, Zachary
Official US Chess recordRegular rating
Provisional rating · Sep 2026 · 6 published updates since Apr 2026
Other formats against Regular
+9 Quick vs Regular (provisional)
No national baseline for this rating band yet.
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- +20
- Apr 2026 to May 2026
- Biggest drop
- -25
- May 2026 to Jun 2026
- Longest rise
- 1 update
- +20 from Apr 2026 to May 2026
- Current run
- 1 update
- Unchanged since Aug 2026
- Typical move
- ±13
- Mean absolute change; spread ±18.1
Regular rating in context
United States
#69,842of 83,635 rated members · higher than 16.4%
13,745 lower · 49 same rating · 69,841 higher · ties share a rank
California
#7,756of 9,051 rated members · higher than 14.2%
1,292 lower · 4 same rating · 7,755 higher · ties share a rank
Where this rating sits · United States
83,635 rated members in 50-point bands · median 800–849 · 10,278 within 100 points of 296 (this player included)
250–299: 2,532 members (3%) · highlighted band is the player’s · dashed line is the target
16.6% below 300 (13,947 of 83,635; 16.4% below 296)
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 | 296 Pno change · 20 games | 305 Pno change · 20 games |
| Aug 2026 | 296 P+18 · 20 games | 305 P+24 · 20 games |
| Jul 2026 | 278 Pno change · 15 games | 281 Pno change · 15 games |
| Jun 2026 | 278 P-25 · 15 games | 281 P-28 · 15 games |
| May 2026 | 303 P+20 · 8 games | 309 P+24 · 8 games |
| Apr 2026 | 283 P4 games | 285 P4 games |