USCF player statistics

Mast, Thomas

USCF 33122610CaliforniaUpdated: Nov 2026

Official US Chess record

Gender: Male
US Chess reported rank: #62,566
Floor: Regular 114 · Quick 114
Rated games: Regular 11 · Quick 11

US Chess record as of Sep 18, 2026

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Regular rating

306

Provisional rating · Nov 2026 · 5 published updates since Jul 2026

Nov 2026306 provisional

Compare format

Jun 2026Nov 2026

6 updates in this window · open points are provisional · guides mark US Chess classes · unpublished months are skipped, not inactivity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

+10 Quick vs Regular (provisional)
Typical for 300–399 regular players: -1 (middle half -6 to +6, 1,217 established members). This gap is above the typical range.

How this rating moves

Between consecutive published observations, provisional included.

Biggest gain: +149; Jul 2026 to Aug 2026
Biggest drop: -18; Aug 2026 to Sep 2026
Longest rise: 1 update; +149 from Jul 2026 to Aug 2026
Current run: 1 update; Unchanged since Oct 2026
Typical move: ±55; Mean absolute change; spread ±75

Regular rating in context

Nov 2026 update

United States

#69,123of 83,032 rated members · higher than 16.7%

13,867 lower · 43 same rating · 69,122 higher · ties share a rank

California

#7,922of 9,288 rated members · higher than 14.6%

1,365 lower · 2 same rating · 7,921 higher · ties share a rank

Where this rating sits · United States

83,032 rated members in 50-point bands · median 850–899 · 10,182 within 100 points of 306 (this player included)

Player · 306

01,4252,850

300–349: 2,607 members (3.1%) · highlighted band is the player’s · dashed line is the target

Target 350

19.4% below 350 (16,176 of 83,032; 16.7% below 306)

Percentile over time · United States

16.7% higher than · Nov 2026 · rank #69,123 of 83,032

Since Jul 2026
+10.6 pts

Jul 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 Mast, Thomas
Month	Regular	Quick
Nov 2026	306 Pno change · 12 games	316 Pno change · 12 games
Oct 2026	306 P+54 · 12 games	316 P+54 · 12 games
Sep 2026	252 P-18 · 11 games	262 P-27 · 11 games
Aug 2026	270 P+149 · 9 games	289 P+145 · 9 games
Jul 2026	121 P4 games	144 P4 games
Jun 2026	—	—

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