USCF player statistics
Siu, Nathan Xiujun
Official US Chess recordRegular rating
Published rating · Sep 2026 · 10 published updates since Dec 2025
Other formats against Regular
-10 Quick vs Regular
No national baseline for this rating band yet.
-530 Online Quick vs Regular (provisional)
No national baseline for this rating band yet.
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- +212
- Dec 2025 to Jan 2026
- Biggest drop
- -1
- Jan 2026 to Feb 2026
- Longest rise
- 1 update
- +212 from Dec 2025 to Jan 2026
- Current run
- 1 update
- Unchanged since Aug 2026
- Typical move
- ±24
- Mean absolute change; spread ±70.7
Regular rating in context
United States
#41,208of 83,635 rated members · higher than 50.6%
42,370 lower · 58 same rating · 41,207 higher · ties share a rank
California
#4,759of 9,051 rated members · higher than 47.3%
4,287 lower · 6 same rating · 4,758 higher · ties share a rank
Where this rating sits · United States
83,635 rated members in 50-point bands · median 800–849 · 8,976 within 100 points of 850 (this player included)
850–899: 2,189 members (2.6%) · highlighted band is the player’s · dashed line is the target
53.2% below 900 (44,559 of 83,635; 50.6% below 850)
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 | Online Quick |
|---|---|---|---|
| Sep 2026 | 850no change | 840no change | 320 Pno change · 14 games |
| Aug 2026 | 850-1 | 840no change | 320 Pno change · 14 games |
| Jul 2026 | 851no change | 840no change | 320 Pno change · 14 games |
| Jun 2026 | 851no change | 840no change | 320 Pno change · 14 games |
| May 2026 | 851no change | 840no change | 320 Pno change · 14 games |
| Apr 2026 | 851no change | 840no change | 320 Pno change · 14 games |
| Mar 2026 | 851+1 | 840no change | 320 Pno change · 14 games |
| Feb 2026 | 850-1 | 840no change | 320 Pno change · 14 games |
| Jan 2026 | 851+212 | 840+208 | 320 Pno change · 14 games |
| Dec 2025 | 639 | 632 | 320 P14 games |