USCF player statistics

Williamson, Ian Robert

USCF 16764245TexasUpdated: Nov 2026

Official US Chess record

Gender: Male
FIDE: FIDE 39960110
US Chess reported rank: #9,993 national · #783 in state
Floor: Regular 1,500 · Quick 1,500 · Blitz 1,500

US Chess record as of Aug 18, 2026

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Regular rating

1,791+51 since Oct 2026

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

Nov 20261,791 Regular

Compare format

Dec 2025Nov 2026

12 updates in this window · +76 first to last · open points are provisional · guides mark US Chess classes · unpublished months are skipped, not inactivity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

+11 Quick vs Regular
Typical for 1,700–1,799 regular players: -125 (middle half -210 to -72, 1,916 established members). This gap is above the typical range.
-118 Blitz vs Regular
Typical for 1,700–1,799 regular players: -218 (middle half -343 to -100, 926 established members). This gap is within the typical range.

How this rating moves

Between consecutive published observations, provisional included.

Biggest gain: +116; Aug 2026 to Sep 2026
Biggest drop: -62; May 2026 to Jun 2026
Longest rise: 1 update; +116 from Aug 2026 to Sep 2026
Updates that moved: 10 of 11; Latest +51, Oct 2026 to Nov 2026
Typical move: ±30; Mean absolute change; spread ±46.4

Regular rating in context

Nov 2026 update

United States

#8,054of 83,032 rated members · higher than 90.2%

74,956 lower · 23 same rating · 8,053 higher · ties share a rank

Texas

#560of 10,533 rated members · higher than 94.6%

9,970 lower · 4 same rating · 559 higher · ties share a rank

Where this rating sits · United States

83,032 rated members in 50-point bands · median 850–899 · 5,562 within 100 points of 1,791 (this player included)

Player · 1,791

01,4252,850

1,750–1,799: 1,226 members (1.4%) · highlighted band is the player’s · dashed line is the target

Target 1,800

90.5% below 1,800 (75,161 of 83,032; 90.2% below 1,791)

Percentile over time · United States

90.2% higher than · Nov 2026 · rank #8,054 of 83,032

Since Dec 2025
+2.4 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 Texas 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 Williamson, Ian Robert
Month	Regular	Quick	Blitz
Nov 2026	1,791+51	1,802+37	1,673-101
Oct 2026	1,740no change	1,765no change	1,774+57
Sep 2026	1,740+116	1,765+36	1,717+29
Aug 2026	1,624-3	1,729+90	1,688+67
Jul 2026	1,627+1	1,639+59	1,621-20
Jun 2026	1,626-62	1,580-36	1,641-4
May 2026	1,688+20	1,616-12	1,645no change
Apr 2026	1,668-17	1,628-7	1,645+4
Mar 2026	1,685-33	1,635+14	1,641-30
Feb 2026	1,718+15	1,621-30	1,671-36
Jan 2026	1,703-12	1,651no change	1,707+22
Dec 2025	1,715	1,651	1,685

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