USCF player statistics

Chok, Derek

USCF 16898100CaliforniaUpdated: Nov 2026

Official US Chess record

Gender: Male
US Chess reported rank: #10,055 national · #707 in state
Floor: Regular 1,400 · Quick 100
Rated games: Quick 7

US Chess record as of Sep 15, 2026

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Regular rating

1,6050 since Oct 2026

Published rating · Nov 2026 · 8 published updates since Apr 2026

Nov 20261,605 Regular

Compare format

Apr 2026Nov 2026

8 updates in this window · -10 first to last · open points are provisional · guides mark US Chess classes · unpublished months are skipped, not inactivity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

-256 Quick vs Regular (provisional)
Typical for 1,600–1,699 regular players: -121 (middle half -201 to -59, 2,187 established members). This gap is below the typical range.

How this rating moves

Between consecutive published observations, provisional included.

Biggest gain: —; No gain between published updates yet
Biggest drop: -10; Apr 2026 to May 2026
Longest rise: —; No consecutive gains yet
Current run: 6 updates; Unchanged since May 2026
Typical move: ±1; Mean absolute change; spread ±3.8

Regular rating in context

Nov 2026 update

United States

#13,680of 83,032 rated members · higher than 83.4%

69,314 lower · 39 same rating · 13,679 higher · ties share a rank

California

#1,800of 9,288 rated members · higher than 80.5%

7,479 lower · 10 same rating · 1,799 higher · ties share a rank

Where this rating sits · United States

83,032 rated members in 50-point bands · median 850–899 · 6,755 within 100 points of 1,605 (this player included)

Player · 1,605

01,4252,850

1,600–1,649: 1,873 members (2.2%) · highlighted band is the player’s · dashed line is the target

Target 1,650

85.2% below 1,650 (70,791 of 83,032; 83.4% below 1,605)

Percentile over time · United States

83.4% higher than · Nov 2026 · rank #13,680 of 83,032

Since Apr 2026
-0.4 pts

Apr 2026Nov 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 Chok, Derek
Month	Regular	Quick
Nov 2026	1,605no change	1,349 Pno change · 7 games
Oct 2026	1,605no change	1,349 Pno change · 7 games
Sep 2026	1,605no change	1,349 Pno change · 7 games
Aug 2026	1,605no change	1,349 Pno change · 7 games
Jul 2026	1,605no change	1,349 Pno change · 7 games
Jun 2026	1,605no change	1,349 Pno change · 7 games
May 2026	1,605-10	1,349 Pno change · 7 games
Apr 2026	1,615	1,349 P7 games

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