USCF player statistics

Chu, Rosalyn

USCF 30566652CaliforniaUpdated: Oct 2026

Official US Chess record

Gender: Female
FIDE: FIDE 39956180
US Chess reported rank: #16,600 national · #970 in state
Floor: Regular 1,200 · Quick 150 · Blitz 150

US Chess record as of Sep 15, 2026

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Regular rating

1,342-15 since Sep 2026

Published rating · Oct 2026 · 11 published updates since Dec 2025

Oct 20261,342 Regular

Compare format

Dec 2025Oct 2026

11 updates in this window · +61 first to last · open points are provisional · guides mark US Chess classes · unpublished months are skipped, not inactivity

Compare with another playerOverlays their published ratings on the chart; the link keeps the comparison.

Other formats against Regular

-152 Quick vs Regular
Typical for 1,300–1,399 regular players: -72 (middle half -140 to -27, 1,944 established members). This gap is below the typical range.
-275 Blitz vs Regular
Typical for 1,300–1,399 regular players: -199 (middle half -330 to -58, 571 established members). This gap is within the typical range.

How this rating moves

Between consecutive published observations, provisional included.

Biggest gain: +83; Jun 2026 to Jul 2026
Biggest drop: -79; Aug 2026 to Sep 2026
Longest rise: 3 updates; +110 from Apr 2026 to Jul 2026
Updates that moved: 8 of 10; Latest -15, Sep 2026 to Oct 2026
Typical move: ±27; Mean absolute change; spread ±40.9

Regular rating in context

Oct 2026 update

United States

#22,648of 82,596 rated members · higher than 72.5%

59,914 lower · 35 same rating · 22,647 higher · ties share a rank

California

#2,741of 9,083 rated members · higher than 69.8%

6,340 lower · 3 same rating · 2,740 higher · ties share a rank

Where this rating sits · United States

82,596 rated members in 50-point bands · median 800–849 · 6,938 within 100 points of 1,342 (this player included)

Player · 1,342

01,4502,900

1,300–1,349: 1,765 members (2.1%) · highlighted band is the player’s · dashed line is the target

Target 1,350

72.8% below 1,350 (60,192 of 82,596; 72.5% below 1,342)

Percentile over time · United States

72.5% higher than · Oct 2026 · rank #22,648 of 82,596

Since Dec 2025
+2.4 pts

Dec 2025Oct 2026

Each month against that month’s active pool, so pool growth and rating drift both count.

How these comparisons are calculated

Chess67 calculations from the Oct 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.

United States statistics California statistics

Published ratings by month

P marks a provisional rating; the small figure is the change since the previous published observation.

Monthly USCF ratings for Chu, Rosalyn
Month	Regular	Quick	Blitz
Oct 2026	1,342-15	1,190no change	1,067no change
Sep 2026	1,357-79	1,190-42	1,067no change
Aug 2026	1,436no change	1,232no change	1,067+2
Jul 2026	1,436+83	1,232no change	1,065no change
Jun 2026	1,353+16	1,232-9	1,065no change
May 2026	1,337+11	1,241no change	1,065no change
Apr 2026	1,326-10	1,241-72	1,065no change
Mar 2026	1,336+22	1,313+72	1,065no change
Feb 2026	1,314no change	1,241no change	1,065no change
Jan 2026	1,314+33	1,241+14	1,065no change
Dec 2025	1,281	1,227	1,065

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