USCF player statistics

Li, Mason Jin

USCF 16739697PennsylvaniaUpdated: Oct 2026

Official US Chess record

Gender: Male
FIDE: FIDE 39900720
US Chess reported rank: #1,608 national · #50 in state
Floor: Regular 1,900 · Quick 1,800 · Blitz 1,400 · Online Regular 1,400 · Online Quick 100

US Chess record as of Sep 15, 2026

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Regular rating

2,091-2 since Sep 2026

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

Oct 20262,091 Regular

Compare format

Dec 2025Oct 2026

11 updates in this window · -29 first to last · open points are provisional · guides mark US Chess classes · unpublished months are skipped, not inactivity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

-108 Quick vs Regular
Typical for 2,000–2,099 regular players: -142 (middle half -228 to -82, 1,051 established members). This gap is within the typical range.
-482 Blitz vs Regular
Typical for 2,000–2,099 regular players: -217 (middle half -323 to -104, 703 established members). This gap is below the typical range.
-489 Online Regular vs Regular
Typical for 2,000–2,099 regular players: -475 (middle half -690 to -264, 251 established members). This gap is within the typical range.
-832 Online Quick vs Regular
Typical for 2,000–2,099 regular players: -420 (middle half -667 to -242, 224 established members). This gap is below the typical range.

How this rating moves

Between consecutive published observations, provisional included.

Biggest gain: +24; Jul 2026 to Aug 2026
Biggest drop: -56; Jun 2026 to Jul 2026
Longest rise: 1 update; +24 from Jul 2026 to Aug 2026
Updates that moved: 9 of 10; Latest -2, Sep 2026 to Oct 2026
Typical move: ±15; Mean absolute change; spread ±23

Regular rating in context

Oct 2026 update

United States

#1,957of 82,596 rated members · higher than 97.6%

80,626 lower · 14 same rating · 1,956 higher · ties share a rank

Pennsylvania

#68of 2,576 rated members · higher than 97.3%

2,508 lower · 1 same rating · 67 higher · ties share a rank

Where this rating sits · United States

82,596 rated members in 50-point bands · median 800–849 · 2,222 within 100 points of 2,091 (this player included)

Player · 2,091

01,4502,900

2,050–2,099: 527 members (0.6%) · highlighted band is the player’s · dashed line is the target

Target 2,100

97.7% below 2,100 (80,711 of 82,596; 97.6% below 2,091)

Percentile over time · United States

97.6% higher than · Oct 2026 · rank #1,957 of 82,596

Since Dec 2025
-0.3 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 Pennsylvania 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 Li, Mason Jin
Month	Regular	Quick	Blitz	Online Regular	Online Quick
Oct 2026	2,091-2	1,983+7	1,609no change	1,602no change	1,259no change
Sep 2026	2,093-23	1,976no change	1,609no change	1,602no change	1,259no change
Aug 2026	2,116+24	1,976+41	1,609no change	1,602no change	1,259no change
Jul 2026	2,092-56	1,935+44	1,609no change	1,602no change	1,259no change
Jun 2026	2,148+20	1,891+42	1,609no change	1,602no change	1,259no change
May 2026	2,128no change	1,849no change	1,609no change	1,602no change	1,259no change
Apr 2026	2,128-2	1,849no change	1,609no change	1,602no change	1,259no change
Mar 2026	2,130+4	1,849no change	1,609no change	1,602no change	1,259no change
Feb 2026	2,126-6	1,849no change	1,609no change	1,602no change	1,259no change
Jan 2026	2,132+12	1,849no change	1,609+24	1,602no change	1,259no change
Dec 2025	2,120	1,849	1,585	1,602	1,259

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