USCF player statistics

Yu, Isabella

USCF 16672170CaliforniaUpdated: Oct 2026
Official US Chess record

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Gender
Female
US Chess reported rank
#13,224 national · #870 in state
Floor
Regular 1,400 · Quick 150 · Blitz 1,200 · Online Regular 100 · Online Quick 100
Rated games
Online Regular 21 · Online Quick 25

US Chess record as of Sep 15, 2026

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Rating format

Regular rating

1,614+129 since Sep 2026

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

Oct 20261,614 Regular
Dec 2025: 1209Jan 2026: 1260Feb 2026: 1312Mar 2026: 1391Apr 2026: 1347May 2026: 1347Jun 2026: 1326Jul 2026: 1493Aug 2026: 1485Sep 2026: 1485Oct 2026: 1614
Dec 2025Oct 2026
11 updates in this window · +405 first to last · open points are provisional · guides mark US Chess classes · unpublished months are skipped, not inactivity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

  • -273 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.

  • -147 Blitz vs Regular

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

  • -681 Online Regular vs Regular (provisional)

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

  • -626 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.

How this rating moves

Between consecutive published observations, provisional included.

Biggest gain
+167
Jun 2026 to Jul 2026
Biggest drop
-44
Mar 2026 to Apr 2026
Longest rise
3 updates
+182 from Dec 2025 to Mar 2026
Updates that moved
8 of 10
Latest +129, Sep 2026 to Oct 2026
Typical move
±55
Mean absolute change; spread ±68.4

Regular rating in context

Oct 2026 update

United States

#13,297of 82,596 rated members · higher than 83.8%

69,259 lower · 41 same rating · 13,296 higher · ties share a rank

California

#1,746of 9,083 rated members · higher than 80.7%

7,334 lower · 4 same rating · 1,745 higher · ties share a rank

Where this rating sits · United States

82,596 rated members in 50-point bands · median 800–849 · 6,703 within 100 points of 1,614 (this player included)

Player · 1,614
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; 83.8% below 1,614)

Percentile over time · United States

83.8% higher than · Oct 2026 · rank #13,297 of 82,596

Since Dec 2025
+16.6 pts

Dec 2025: higher than 67.2% (rank 26,529 of 81,102)Jan 2026: higher than 68.8% (rank 24,699 of 79,487)Feb 2026: higher than 71.4% (rank 23,968 of 83,940)Mar 2026: higher than 74.1% (rank 20,779 of 80,605)Apr 2026: higher than 72.6% (rank 22,028 of 80,831)May 2026: higher than 72.6% (rank 22,146 of 81,236)Jun 2026: higher than 72.3% (rank 23,022 of 83,290)Jul 2026: higher than 79% (rank 17,278 of 82,736)Aug 2026: higher than 78.7% (rank 17,628 of 83,080)Sep 2026: higher than 78.7% (rank 17,777 of 83,635)Oct 2026: higher than 83.8% (rank 13,297 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 Yu, Isabella
MonthRegularQuickBlitzOnline RegularOnline Quick
Oct 20261,614+1291,341+61,467+105933 Pno change · 21 games988no change
Sep 20261,485no change1,335no change1,362-1933 Pno change · 21 games988no change
Aug 20261,485-81,335+61,363no change933 Pno change · 21 games988no change
Jul 20261,493+1671,329+1151,363+352933 Pno change · 21 games988no change
Jun 20261,326-211,214-171,011 Pno change · 18 games933 Pno change · 21 games988no change
May 20261,347no change1,231-381,011 Pno change · 18 games933 Pno change · 21 games988no change
Apr 20261,347-441,269-451,011 Pno change · 18 games933 Pno change · 21 games988no change
Mar 20261,391+791,314+951,011 Pno change · 18 games933 Pno change · 21 games988no change
Feb 20261,312+521,219+461,011 Pno change · 18 games933 Pno change · 21 games988no change
Jan 20261,260+511,173+371,011 Pno change · 18 games933 Pno change · 21 games988no change
Dec 20251,2091,1361,011 P18 games933 P21 games988
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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.