USCF player statistics

Williams, Dereck Arthur

USCF 13428836CaliforniaUpdated: Nov 2026

Official US Chess record

Gender: Male
US Chess reported rank: #35,107 national · #1,926 in state
Floor: Regular 150 · Quick 150 · Blitz 1,200

US Chess record as of Sep 15, 2026

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Regular rating

855+11 since Oct 2026

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

Nov 2026855 Regular

Compare format

Dec 2025Nov 2026

12 updates in this window · -55 first to last · open points are provisional · guides mark US Chess classes · unpublished months are skipped, not inactivity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

+9 Quick vs Regular
Typical for 800–899 regular players: -11 (middle half -31 to +8, 2,426 established members). This gap is above the typical range.
+390 Blitz vs Regular
Typical for 800–899 regular players: -103 (middle half -213 to +39, 205 established members). This gap is above the typical range.

How this rating moves

Between consecutive published observations, provisional included.

Biggest gain: +75; May 2026 to Jun 2026
Biggest drop: -119; Aug 2026 to Sep 2026
Longest rise: 2 updates; +46 from Sep 2026 to Nov 2026
Updates that moved: 11 of 11; Latest +11, Oct 2026 to Nov 2026
Typical move: ±33; Mean absolute change; spread ±49.2

Regular rating in context

Nov 2026 update

United States

#41,253of 83,032 rated members · higher than 50.2%

41,741 lower · 39 same rating · 41,252 higher · ties share a rank

California

#4,860of 9,288 rated members · higher than 47.6%

4,424 lower · 5 same rating · 4,859 higher · ties share a rank

Where this rating sits · United States

83,032 rated members in 50-point bands · median 850–899 · 8,973 within 100 points of 855 (this player included)

Player · 855

01,4252,850

850–899: 2,146 members (2.5%) · highlighted band is the player’s · dashed line is the target

Target 900

52.5% below 900 (43,657 of 83,032; 50.2% below 855)

Percentile over time · United States

50.2% higher than · Nov 2026 · rank #41,253 of 83,032

Since Dec 2025
-3.5 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 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 Williams, Dereck Arthur
Month	Regular	Quick	Blitz
Nov 2026	855+11	864-12	1,245no change
Oct 2026	844+35	876-11	1,245no change
Sep 2026	809-119	887-44	1,245no change
Aug 2026	928+12	931+12	1,245no change
Jul 2026	916-43	919-10	1,245no change
Jun 2026	959+75	929+92	1,245no change
May 2026	884-31	837-52	1,245no change
Apr 2026	915+9	889+5	1,245no change
Mar 2026	906-11	884+20	1,245no change
Feb 2026	917-6	864-57	1,245no change
Jan 2026	923+13	921+7	1,245no change
Dec 2025	910	914	1,245

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