USCF player statistics

Alfonso, Katie

USCF 30333856ArizonaUpdated: Nov 2026

Official US Chess record

Gender: Female
FIDE: FIDE 0
US Chess reported rank: #59,361 national · #1,159 in state
Floor: Regular 150 · Quick 150

US Chess record as of Sep 15, 2026

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Regular rating

431+114 since Oct 2026

Published rating · Nov 2026 · 12 published updates since Dec 2025

Nov 2026431 Regular

Compare format

Dec 2025Nov 2026

12 updates in this window · +129 first to last · open points are provisional · guides mark US Chess classes · unpublished months are skipped, not inactivity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

0 Quick vs Regular
Typical for 400–499 regular players: -1 (middle half -9 to +7, 1,654 established members). This gap is within the typical range.

How this rating moves

Between consecutive published observations, provisional included.

Biggest gain: +114; Oct 2026 to Nov 2026
Biggest drop: -1; Aug 2026 to Sep 2026
Longest rise: 1 update; +114 from Oct 2026 to Nov 2026
Updates that moved: 3 of 11; Latest +114, Oct 2026 to Nov 2026
Typical move: ±12; Mean absolute change; spread ±34.3

Regular rating in context

Nov 2026 update

United States

#62,462of 83,032 rated members · higher than 24.6%

20,506 lower · 65 same rating · 62,461 higher · ties share a rank

Arizona

#1,313of 1,707 rated members · higher than 23%

394 lower · 1 same rating · 1,312 higher · ties share a rank

Where this rating sits · United States

83,032 rated members in 50-point bands · median 850–899 · 10,812 within 100 points of 431 (this player included)

Player · 431

01,4252,850

400–449: 2,739 members (3.2%) · highlighted band is the player’s · dashed line is the target

Target 450

25.9% below 450 (21,555 of 83,032; 24.6% below 431)

Percentile over time · United States

24.6% higher than · Nov 2026 · rank #62,462 of 83,032

Since Dec 2025
+7.6 pts

Dec 2025Nov 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 Nov 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 Arizona 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 Alfonso, Katie
Month	Regular	Quick
Nov 2026	431+114	431+114
Oct 2026	317no change	317no change
Sep 2026	317-1	317no change
Aug 2026	318no change	317no change
Jul 2026	318no change	317no change
Jun 2026	318+16	317+15
May 2026	302no change	302no change
Apr 2026	302no change	302no change
Mar 2026	302no change	302no change
Feb 2026	302no change	302no change
Jan 2026	302no change	302no change
Dec 2025	302	302

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