USCF player statistics
Zhou, Yunbo
Official US Chess recordRegular rating
Published rating · Sep 2026 · 10 published updates since Dec 2025
Other formats against Regular
+7 Quick vs Regular
No national baseline for this rating band yet.
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- +95
- Apr 2026 to May 2026
- Biggest drop
- —
- No drop between published updates yet
- Longest rise
- 2 updates
- +99 from Mar 2026 to May 2026
- Current run
- 1 update
- Unchanged since Aug 2026
- Typical move
- ±11
- Mean absolute change; spread ±31.4
Regular rating in context
United States
#48,780of 83,635 rated members · higher than 41.6%
34,801 lower · 55 same rating · 48,779 higher · ties share a rank
Massachusetts
#1,233of 1,677 rated members · higher than 26.4%
444 lower · 1 same rating · 1,232 higher · ties share a rank
Where this rating sits · United States
83,635 rated members in 50-point bands · median 800–849 · 9,970 within 100 points of 690 (this player included)
650–699: 2,499 members (2.9%) · highlighted band is the player’s · dashed line is the target
42.2% below 700 (35,335 of 83,635; 41.6% below 690)
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 | 690no change | 697-1 |
| Aug 2026 | 690+2 | 698-34 |
| Jul 2026 | 688no change | 732no change |
| Jun 2026 | 688no change | 732no change |
| May 2026 | 688+95 | 732+46 |
| Apr 2026 | 593+4 | 686-16 |
| Mar 2026 | 589no change | 702no change |
| Feb 2026 | 589no change | 702no change |
| Jan 2026 | 589no change | 702no change |
| Dec 2025 | 589 | 702 |