USCF player statistics

Zafft, Dietrich

USCF 15607178MissouriUpdated: Nov 2026

Official US Chess record

Gender: Male
US Chess reported rank: #18,810 national · #325 in state
Floor: Regular 114 · Quick 145 · Blitz 150
Rated games: Regular 18

US Chess record as of Sep 15, 2026

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Regular rating

1,278

Provisional rating · Nov 2026 · 11 published updates since Dec 2025

Nov 20261,278 provisional

Compare format

Dec 2025Nov 2026

11 updates in this window · open points are provisional · guides mark US Chess classes · unpublished months are skipped, not inactivity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

+75 Quick vs Regular
Typical for 1,200–1,299 regular players: -55 (middle half -112 to -18, 1,981 established members). This gap is above the typical range.
+18 Blitz vs Regular
Typical for 1,200–1,299 regular players: -154 (middle half -306 to -39, 421 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: -45; Feb 2026 to Mar 2026
Longest rise: —; No consecutive gains yet
Current run: 8 updates; Unchanged since Mar 2026
Typical move: ±5; Mean absolute change; spread ±14.2

Regular rating in context

Nov 2026 update

United States

#25,063of 83,032 rated members · higher than 69.7%

57,938 lower · 32 same rating · 25,062 higher · ties share a rank

Missouri

#442of 1,317 rated members · higher than 66.4%

875 lower · 1 same rating · 441 higher · ties share a rank

Where this rating sits · United States

83,032 rated members in 50-point bands · median 850–899 · 6,987 within 100 points of 1,278 (this player included)

Player · 1,278

01,4252,850

1,250–1,299: 1,654 members (1.9%) · highlighted band is the player’s · dashed line is the target

Target 1,300

70.6% below 1,300 (58,658 of 83,032; 69.7% below 1,278)

Percentile over time · United States

69.7% higher than · Nov 2026 · rank #25,063 of 83,032

Since Dec 2025
-2.2 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 Missouri 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 Zafft, Dietrich
Month	Regular	Quick	Blitz
Nov 2026	1,278 Pno change · 18 games	1,353no change	1,296no change
Oct 2026	1,278 Pno change · 18 games	1,353no change	1,296no change
Sep 2026	1,278 Pno change · 18 games	1,353no change	1,296no change
Aug 2026	1,278 Pno change · 18 games	1,353no change	1,296no change
Jul 2026	1,278 Pno change · 18 games	1,353no change	1,296no change
Jun 2026	1,278 Pno change · 18 games	1,353+36	1,296-8
May 2026	1,278 Pno change · 18 games	1,317no change	1,304-30
Apr 2026	1,278 Pno change · 18 games	1,317+50	1,334-8
Mar 2026	1,278 P-45 · 18 games	1,267 P+61 · 23 games	1,342-12
Feb 2026	1,323 Pno change · 18 games	1,206 Pno change · 23 games	1,354+113
Dec 2025	1,323 P10 games	1,206 P12 games	1,241 P13 games

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