USCF player statistics

Mazur, Emma

USCF 30140599MaineUpdated: Oct 2026

Official US Chess record

Gender: Female
US Chess reported rank: #29,607 national · #130 in state
Floor: Regular 150 · Quick 150 · Online Regular 100
Rated games: Online Regular 8

US Chess record as of Sep 15, 2026

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Regular rating

9470 since Sep 2026

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

Oct 2026947 Regular

Compare format

Dec 2025Oct 2026

11 updates in this window · +71 first to last · open points are provisional · guides mark US Chess classes · unpublished months are skipped, not inactivity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

-17 Quick vs Regular
Typical for 900–999 regular players: -19 (middle half -49 to +4, 2,330 established members). This gap is within the typical range.
-521 Online Regular vs Regular (provisional)
Typical for 900–999 regular players: -132 (middle half -260 to +45, 110 established members). This gap is below the typical range.

How this rating moves

Between consecutive published observations, provisional included.

Biggest gain: +71; Apr 2026 to May 2026
Biggest drop: —; No drop between published updates yet
Longest rise: 1 update; +71 from Apr 2026 to May 2026
Current run: 5 updates; Unchanged since May 2026
Typical move: ±7; Mean absolute change; spread ±22.5

Regular rating in context

Oct 2026 update

United States

#37,007of 82,596 rated members · higher than 55.1%

45,545 lower · 45 same rating · 37,006 higher · ties share a rank

Maine

#164of 401 rated members · higher than 59.1%

237 lower · 1 same rating · 163 higher · ties share a rank

Where this rating sits · United States

82,596 rated members in 50-point bands · median 800–849 · 8,237 within 100 points of 947 (this player included)

Player · 947

01,4502,900

900–949: 2,102 members (2.5%) · highlighted band is the player’s · dashed line is the target

Target 950

55.3% below 950 (45,678 of 82,596; 55.1% below 947)

Percentile over time · United States

55.1% higher than · Oct 2026 · rank #37,007 of 82,596

Since Dec 2025
+3.1 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 Maine 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 Mazur, Emma
Month	Regular	Quick	Online Regular
Oct 2026	947no change	930no change	426 Pno change · 8 games
Sep 2026	947no change	930no change	426 Pno change · 8 games
Aug 2026	947no change	930no change	426 Pno change · 8 games
Jul 2026	947no change	930no change	426 Pno change · 8 games
Jun 2026	947no change	930no change	426 Pno change · 8 games
May 2026	947+71	930+68	426 Pno change · 8 games
Apr 2026	876no change	862no change	426 Pno change · 8 games
Mar 2026	876no change	862no change	426 Pno change · 8 games
Feb 2026	876no change	862no change	426 Pno change · 8 games
Jan 2026	876no change	862no change	426 Pno change · 8 games
Dec 2025	876	862	426 P8 games

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