USCF player statistics

Ostertag, Kora

USCF 30145194NevadaUpdated: Oct 2026
Official US Chess record

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Gender
Female
FIDE
FIDE 0
US Chess reported rank
#38,291 national · #275 in state
Floor
Regular 150 · Quick 150 · Online Regular 100 · Online Quick 100 · Online Blitz 100
Rated games
Online Quick 10 · Online Blitz 19

US Chess record as of Sep 15, 2026

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Rating format

Regular rating

7370 since Sep 2026

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

Oct 2026737 Regular
Dec 2025: 557Jan 2026: 557Feb 2026: 557Mar 2026: 557Apr 2026: 557May 2026: 557Jun 2026: 737Jul 2026: 737Aug 2026: 737Sep 2026: 737Oct 2026: 737
Dec 2025Oct 2026
11 updates in this window · +180 first to last · open points are provisional · guides mark US Chess classes · unpublished months are skipped, not inactivity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

  • -13 Quick vs Regular

    Typical for 700–799 regular players: -7 (middle half -24 to +7, 2,401 established members). This gap is within the typical range.

  • -107 Online Regular vs Regular

    Typical for 700–799 regular players: -34 (middle half -173 to +98, 57 established members). This gap is within the typical range.

  • -258 Online Quick vs Regular (provisional)

    Typical for 700–799 regular players: +146 (middle half -167 to +297, 84 established members). This gap is below the typical range.

  • -100 Online Blitz vs Regular (provisional)

    No national baseline for this rating band yet.

How this rating moves

Between consecutive published observations, provisional included.

Biggest gain
+180
May 2026 to Jun 2026
Biggest drop
—
No drop between published updates yet
Longest rise
1 update
+180 from May 2026 to Jun 2026
Current run
4 updates
Unchanged since Jun 2026
Typical move
±18
Mean absolute change; spread ±56.9

Regular rating in context

Oct 2026 update

United States

#46,294of 82,596 rated members · higher than 43.8%

36,257 lower · 46 same rating · 46,293 higher · ties share a rank

Nevada

#370of 713 rated members · higher than 48.1%

343 lower · 1 same rating · 369 higher · ties share a rank

Where this rating sits · United States

82,596 rated members in 50-point bands · median 800–849 · 9,495 within 100 points of 737 (this player included)

Player · 737
01,4502,900

700–749: 2,334 members (2.8%) · highlighted band is the player’s · dashed line is the target

44.6% below 750 (36,862 of 82,596; 43.8% below 737)

Percentile over time · United States

43.8% higher than · Oct 2026 · rank #46,294 of 82,596

Since Dec 2025
+10.5 pts

Dec 2025: higher than 33.3% (rank 53,992 of 81,102)Jan 2026: higher than 32.8% (rank 53,299 of 79,487)Feb 2026: higher than 32.9% (rank 56,184 of 83,940)Mar 2026: higher than 32.7% (rank 54,145 of 80,605)Apr 2026: higher than 32.8% (rank 54,209 of 80,831)May 2026: higher than 32.7% (rank 54,554 of 81,236)Jun 2026: higher than 44.4% (rank 46,230 of 83,290)Jul 2026: higher than 44.6% (rank 45,760 of 82,736)Aug 2026: higher than 44.5% (rank 46,045 of 83,080)Sep 2026: higher than 44.3% (rank 46,474 of 83,635)Oct 2026: higher than 43.8% (rank 46,294 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 Nevada 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 Ostertag, Kora
MonthRegularQuickOnline RegularOnline QuickOnline Blitz
Oct 2026737no change724no change630no change479 Pno change · 10 games637 Pno change · 19 games
Sep 2026737no change724no change630no change479 Pno change · 10 games637 Pno change · 19 games
Aug 2026737no change724no change630no change479 Pno change · 10 games637 P-1 · 19 games
Jul 2026737no change724no change630-83479 Pno change · 10 games638 P+2 · 19 games
Jun 2026737+180724+168713-64479 Pno change · 10 games636 P14 games
May 2026557no change556no change777no change479 Pno change · 10 games—
Apr 2026557no change556+1777no change479 Pno change · 10 games—
Mar 2026557no change555no change777no change479 Pno change · 10 games—
Feb 2026557no change555-1777no change479 Pno change · 10 games—
Jan 2026557no change556no change777no change479 Pno change · 10 games—
Dec 2025557556777479 P10 games—
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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.