USCF player statistics

Sullivan, Brian

USCF 32609905CaliforniaUpdated: Oct 2026
Official US Chess record

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Gender
Male
FIDE
FIDE 566001684
US Chess reported rank
#42,463 national · #2,530 in state
Floor
Regular 150 · Quick 150 · Online Regular 100 · Online Quick 100
Rated games
Online Regular 13

US Chess record as of Sep 17, 2026

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Rating format

Regular rating

587-60 since Sep 2026

Published rating · Oct 2026 · 10 published updates since Jan 2026

Oct 2026587 Regular
Jan 2026: 793 provisionalFeb 2026: 793 provisionalMar 2026: 793 provisionalApr 2026: 782 provisionalMay 2026: 771Jun 2026: 651Jul 2026: 529Aug 2026: 631Sep 2026: 647Oct 2026: 587
Dec 2025Oct 2026
11 updates in this window · open points are provisional · guides mark US Chess classes · unpublished months are skipped, not inactivity
Overlays their published ratings on the chart; the link keeps the comparison.

Other formats against Regular

  • +68 Quick vs Regular

    Typical for 500–599 regular players: -3 (middle half -12 to +9, 2,124 established members). This gap is above the typical range.

  • -26 Online Regular vs Regular (provisional)

    No national baseline for this rating band yet.

  • +216 Online Quick vs Regular

    Typical for 500–599 regular players: +239 (middle half -40 to +436, 34 established members). This gap is within the typical range.

How this rating moves

Between consecutive published observations, provisional included.

Biggest gain
+102
Jul 2026 to Aug 2026
Biggest drop
-122
Jun 2026 to Jul 2026
Longest rise
2 updates
+118 from Jul 2026 to Sep 2026
Updates that moved
7 of 9
Latest -60, Sep 2026 to Oct 2026
Typical move
±49
Mean absolute change; spread ±69.9

Regular rating in context

Oct 2026 update

United States

#53,756of 82,596 rated members · higher than 34.8%

28,796 lower · 45 same rating · 53,755 higher · ties share a rank

California

#6,203of 9,083 rated members · higher than 31.6%

2,877 lower · 4 same rating · 6,202 higher · ties share a rank

Where this rating sits · United States

82,596 rated members in 50-point bands · median 800–849 · 10,357 within 100 points of 587 (this player included)

Player · 587
01,4502,900

550–599: 2,631 members (3.1%) · highlighted band is the player’s · dashed line is the target

35.6% below 600 (29,460 of 82,596; 34.8% below 587)

Percentile over time · United States

34.8% higher than · Oct 2026 · rank #53,756 of 82,596

Since Jan 2026
-12.1 pts

Jan 2026: higher than 46.9% (rank 42,106 of 79,487)Feb 2026: higher than 47.1% (rank 44,334 of 83,940)Mar 2026: higher than 46.7% (rank 42,902 of 80,605)Apr 2026: higher than 46.3% (rank 43,330 of 80,831)May 2026: higher than 45.6% (rank 44,059 of 81,236)Jun 2026: higher than 39.2% (rank 50,507 of 83,290)Jul 2026: higher than 31.8% (rank 56,357 of 82,736)Aug 2026: higher than 38.1% (rank 51,300 of 83,080)Sep 2026: higher than 39% (rank 50,892 of 83,635)Oct 2026: higher than 34.8% (rank 53,756 of 82,596)
Jan 2026Oct 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 Oct 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 Sullivan, Brian
MonthRegularQuickOnline RegularOnline Quick
Oct 2026587-60655no change561 P-1 · 13 games803no change
Sep 2026647+16655+8562 Pno change · 13 games803+58
Aug 2026631+102647+78562 Pno change · 13 games745+39
Jul 2026529-122569-138562 Pno change · 13 games706+1
Jun 2026651-120707no change562 P+39 · 13 games705 Pno change · 21 games
May 2026771-11707+133523 Pno change · 8 games705 Pno change · 21 games
Apr 2026782 P-11 · 19 games574+8523 Pno change · 8 games705 Pno change · 21 games
Mar 2026793 Pno change · 16 games566 P-26 · 22 games523 P+1 · 8 games705 P-57 · 21 games
Feb 2026793 Pno change · 16 games592 P-137 · 22 games522 P-51 · 8 games762 P21 games
Jan 2026793 P10 games729 P12 games573 P4 games—
Dec 2025————
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About these statistics. Built from the monthly USCF rating updates available to Chess67. Ratings change between publications, and a missing month is not inactivity. The official US Chess record has current ratings and tournament history.