USCF player statistics

Wieczorek, Stefania Jozefina

USCF 30910786FloridaUpdated: Oct 2026

Official US Chess record

Gender: Female
US Chess reported rank: #62,135 national · #3,151 in state
Floor: Regular 150 · Quick 150

US Chess record as of Sep 16, 2026

Find USCF-rated tournamentsBrowse upcoming events and entry requirements.

Regular rating

520+260 since Sep 2026

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

Oct 2026520 Regular

Compare format

Dec 2025Oct 2026

11 updates in this window · +241 first to last · open points are provisional · guides mark US Chess classes · unpublished months are skipped, not inactivity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

-26 Quick vs Regular
Typical for 500–599 regular players: -3 (middle half -12 to +9, 2,124 established members). This gap is below the typical range.

How this rating moves

Between consecutive published observations, provisional included.

Biggest gain: +260; Sep 2026 to Oct 2026
Biggest drop: -19; Aug 2026 to Sep 2026
Longest rise: 1 update; +260 from Sep 2026 to Oct 2026
Updates that moved: 2 of 10; Latest +260, Sep 2026 to Oct 2026
Typical move: ±28; Mean absolute change; spread ±83.1

Regular rating in context

Oct 2026 update

United States

#57,245of 82,596 rated members · higher than 30.6%

25,296 lower · 56 same rating · 57,244 higher · ties share a rank

Florida

#2,986of 4,341 rated members · higher than 31.1%

1,352 lower · 4 same rating · 2,985 higher · ties share a rank

Where this rating sits · United States

82,596 rated members in 50-point bands · median 800–849 · 10,692 within 100 points of 520 (this player included)

Player · 520

01,4502,900

500–549: 2,652 members (3.2%) · highlighted band is the player’s · dashed line is the target

Target 550

32.4% below 550 (26,829 of 82,596; 30.6% below 520)

Percentile over time · United States

30.6% higher than · Oct 2026 · rank #57,245 of 82,596

Since Dec 2025
+15 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 Florida 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 Wieczorek, Stefania Jozefina
Month	Regular	Quick
Oct 2026	520+260	494+223
Sep 2026	260-19	271-18
Aug 2026	279no change	289no change
Jul 2026	279no change	289no change
Jun 2026	279no change	289no change
May 2026	279no change	289no change
Apr 2026	279no change	289no change
Mar 2026	279no change	289no change
Feb 2026	279no change	289no change
Jan 2026	279no change	289no change
Dec 2025	279	289

Chess67 DiscordChat with the Chess67 community.Open Find a chess tournamentUpcoming events near you.Browse Find a chess clubClubs and meetups near you.Browse