USCF player statistics

Diaz, Isaiah

USCF 31708456IllinoisLatest monthly rating update: Sep 2026

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Regular rating

5220 since Aug 2026

Published rating · Sep 2026 · 10 published updates since Dec 2025

Sep 2026522 Regular

Compare format

Dec 2025Sep 2026

10 updates in this window · open points are provisional · guides mark US Chess classes · unpublished months are skipped, not inactivity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

-4 Quick vs Regular
No national baseline for this rating band yet.

How this rating moves

Between consecutive published observations, provisional included.

Biggest gain: +9; Dec 2025 to Jan 2026
Biggest drop: -21; Mar 2026 to Apr 2026
Longest rise: 1 update; +9 from Dec 2025 to Jan 2026
Current run: 5 updates; Unchanged since Apr 2026
Typical move: ±3; Mean absolute change; spread ±8

Regular rating in context

Sep 2026 update

United States

31.1%of the comparison population has a lower rating.

26,026 lower · 59 same rating · 57,550 higher

Illinois

39.2%of the comparison population has a lower rating.

1,834 lower · 4 same rating · 2,840 higher

Where this rating sits · United States

83,635 rated members in 50-point bands · median 800–849 · 10,933 within 100 points of 522

Player · 522

01,4502,900

500–549: 2,741 members (3.2%) · highlighted band is the player’s · dashed line is the target

Target 550

32.8% below 550 (27,504 of 83,635; 31.1% below 522)

How these comparisons are calculated

Chess67 calculations from the Sep 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: it is a rating comparison, not a prediction of future rank. This player is outside that comparison population; no membership rank is assigned.

United States statistics Illinois 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 Diaz, Isaiah
Month	Regular	Quick
Sep 2026	522no change	518no change
Aug 2026	522no change	518no change
Jul 2026	522no change	518no change
Jun 2026	522no change	518no change
May 2026	522no change	518no change
Apr 2026	522-21	518-21
Mar 2026	543no change	539no change
Feb 2026	543no change	539no change
Jan 2026	543+9	539+8
Dec 2025	534 P22 games	531 P22 games