USCF player statistics

Portegies-Zwart, Rob

USCF 14247345FloridaUpdated: Nov 2026

Official US Chess record

Gender: Male
FIDE: FIDE 0
Floor: Regular 1,600 · Quick 1,500 · Blitz 1,500

US Chess record as of Sep 15, 2026

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Regular rating

1,6780 since Oct 2026

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

Nov 20261,678 Regular

Compare format

Dec 2025Nov 2026

12 updates in this window · 0 first to last · open points are provisional · guides mark US Chess classes · unpublished months are skipped, not inactivity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

-160 Quick vs Regular
Typical for 1,600–1,699 regular players: -121 (middle half -201 to -59, 2,187 established members). This gap is within the typical range.
-74 Blitz vs Regular
Typical for 1,600–1,699 regular players: -212 (middle half -343 to -86, 956 established members). This gap is above the typical range.

How this rating moves

Between consecutive published observations, provisional included.

Biggest gain: —; No gain between published updates yet
Biggest drop: —; No drop between published updates yet
Longest rise: —; No consecutive gains yet
Current run: 11 updates; Unchanged since Dec 2025
Typical move: ±0; Mean absolute change; spread ±0

Regular rating in context

Nov 2026 update

United States

#11,337of 83,032 rated members · higher than 86.3%

71,658 lower · 38 same rating · 11,336 higher · ties share a rank

Florida

#623of 4,459 rated members · higher than 86%

3,835 lower · 2 same rating · 622 higher · ties share a rank

Where this rating sits · United States

83,032 rated members in 50-point bands · median 850–899 · 6,383 within 100 points of 1,678 (this player included)

Player · 1,678

01,4252,850

1,650–1,699: 1,498 members (1.8%) · highlighted band is the player’s · dashed line is the target

Target 1,700

87% below 1,700 (72,289 of 83,032; 86.3% below 1,678)

Percentile over time · United States

86.3% higher than · Nov 2026 · rank #11,337 of 83,032

Since Dec 2025
+0.1 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 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 Portegies-Zwart, Rob
Month	Regular	Quick	Blitz
Nov 2026	1,678no change	1,518no change	1,604no change
Oct 2026	1,678no change	1,518no change	1,604no change
Sep 2026	1,678no change	1,518no change	1,604no change
Aug 2026	1,678no change	1,518no change	1,604no change
Jul 2026	1,678no change	1,518no change	1,604no change
Jun 2026	1,678no change	1,518no change	1,604no change
May 2026	1,678no change	1,518no change	1,604no change
Apr 2026	1,678no change	1,518no change	1,604no change
Mar 2026	1,678no change	1,518no change	1,604no change
Feb 2026	1,678no change	1,518no change	1,604no change
Jan 2026	1,678no change	1,518no change	1,604no change
Dec 2025	1,678	1,518	1,604

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