USCF player statistics

Sizova, Sophia

USCF 16858008CaliforniaUpdated: Oct 2026
Official US Chess record

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Gender
Female
FIDE
FIDE 39920658
US Chess reported rank
#9,205 national · #642 in state
Floor
Regular 1,400 · Quick 150 · Blitz 150 · Online Regular 100 · Online Quick 100 · Online Blitz 100

US Chess record as of Sep 15, 2026

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Rating format

Regular rating

1,642+1 since Sep 2026

Published rating · Oct 2026 · 11 published updates since Dec 2025

Oct 20261,642 Regular
Dec 2025: 1584Jan 2026: 1584Feb 2026: 1576Mar 2026: 1576Apr 2026: 1576May 2026: 1650Jun 2026: 1650Jul 2026: 1663Aug 2026: 1663Sep 2026: 1641Oct 2026: 1642
Dec 2025Oct 2026
11 updates in this window · +58 first to last · open points are provisional · guides mark US Chess classes · unpublished months are skipped, not inactivity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

  • -580 Quick vs Regular

    Typical for 1,600–1,699 regular players: -119 (middle half -202 to -59, 2,135 established members). This gap is below the typical range.

  • -403 Blitz vs Regular

    Typical for 1,600–1,699 regular players: -208 (middle half -334 to -84, 934 established members). This gap is below the typical range.

  • -961 Online Regular vs Regular

    Typical for 1,600–1,699 regular players: -360 (middle half -572 to -180, 262 established members). This gap is below the typical range.

  • -905 Online Quick vs Regular

    Typical for 1,600–1,699 regular players: -337 (middle half -560 to -149, 270 established members). This gap is below the typical range.

  • -397 Online Blitz vs Regular

    Typical for 1,600–1,699 regular players: -74 (middle half -194 to +59, 222 established members). This gap is below the typical range.

How this rating moves

Between consecutive published observations, provisional included.

Biggest gain
+74
Apr 2026 to May 2026
Biggest drop
-22
Aug 2026 to Sep 2026
Longest rise
1 update
+74 from Apr 2026 to May 2026
Updates that moved
5 of 10
Latest +1, Sep 2026 to Oct 2026
Typical move
±12
Mean absolute change; spread ±25.5

Regular rating in context

Oct 2026 update

United States

#12,390of 82,596 rated members · higher than 84.9%

70,176 lower · 31 same rating · 12,389 higher · ties share a rank

California

#1,621of 9,083 rated members · higher than 82.1%

7,460 lower · 3 same rating · 1,620 higher · ties share a rank

Where this rating sits · United States

82,596 rated members in 50-point bands · median 800–849 · 6,526 within 100 points of 1,642 (this player included)

Player · 1,642
01,4502,900

1,600–1,649: 1,851 members (2.2%) · highlighted band is the player’s · dashed line is the target

85.2% below 1,650 (70,433 of 82,596; 84.9% below 1,642)

Percentile over time · United States

84.9% higher than · Oct 2026 · rank #12,390 of 82,596

Since Dec 2025
+2.4 pts

Dec 2025: higher than 82.5% (rank 14,140 of 81,102)Jan 2026: higher than 82.3% (rank 14,022 of 79,487)Feb 2026: higher than 82.3% (rank 14,826 of 83,940)Mar 2026: higher than 82.1% (rank 14,373 of 80,605)Apr 2026: higher than 82.1% (rank 14,372 of 80,831)May 2026: higher than 85.2% (rank 11,954 of 81,236)Jun 2026: higher than 85.5% (rank 11,996 of 83,290)Jul 2026: higher than 86% (rank 11,517 of 82,736)Aug 2026: higher than 86% (rank 11,582 of 83,080)Sep 2026: higher than 85.1% (rank 12,380 of 83,635)Oct 2026: higher than 84.9% (rank 12,390 of 82,596)
Dec 2025Oct 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 Sizova, Sophia
MonthRegularQuickBlitzOnline RegularOnline QuickOnline Blitz
Oct 20261,642+11,062no change1,239no change681no change737no change1,245no change
Sep 20261,641-221,062no change1,239no change681no change737no change1,245no change
Aug 20261,663no change1,062no change1,239no change681no change737no change1,245no change
Jul 20261,663+131,062no change1,239no change681no change737no change1,245no change
Jun 20261,650no change1,062no change1,239no change681no change737no change1,245no change
May 20261,650+741,062no change1,239-20681no change737no change1,245no change
Apr 20261,576no change1,062no change1,259no change681no change737no change1,245no change
Mar 20261,576no change1,062no change1,259no change681no change737no change1,245no change
Feb 20261,576-81,062no change1,259+200681no change737no change1,245no change
Jan 20261,584no change1,062no change1,059no change681no change737no change1,245no change
Dec 20251,5841,0621,0596817371,245
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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.