USCF player statistics

Koo, Oliver T

USCF 12524348OhioUpdated: Oct 2026

Official US Chess record

Gender: Male
FIDE: FIDE 2018829
US Chess reported rank: #463 national · #14 in state
Floor: Regular 2,200 · Quick 2,000 · Blitz 1,900

US Chess record as of Sep 15, 2026

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Regular rating

2,2880 since Sep 2026

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

Oct 20262,288 Regular

Compare format

Dec 2025Oct 2026

11 updates in this window · -9 first to last · open points are provisional · guides mark US Chess classes · unpublished months are skipped, not inactivity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

-63 Quick vs Regular
Typical for 2,200–2,299 regular players: -170 (middle half -248 to -94, 546 established members). This gap is above the typical range.
-124 Blitz vs Regular
Typical for 2,200–2,299 regular players: -172 (middle half -283 to -91, 399 established members). This gap is within the typical range.

How this rating moves

Between consecutive published observations, provisional included.

Biggest gain: —; No gain between published updates yet
Biggest drop: -9; Apr 2026 to May 2026
Longest rise: —; No consecutive gains yet
Current run: 5 updates; Unchanged since May 2026
Typical move: ±1; Mean absolute change; spread ±2.8

Regular rating in context

Oct 2026 update

United States

#497of 82,596 rated members · higher than 99.3%

82,095 lower · 5 same rating · 496 higher · ties share a rank

Ohio

#16of 2,387 rated members · higher than 99.3%

2,371 lower · 1 same rating · 15 higher · ties share a rank

Where this rating sits · United States

82,596 rated members in 50-point bands · median 800–849 · 972 within 100 points of 2,288 (this player included)

Player · 2,288

01,4502,900

2,250–2,299: 184 members (0.2%) · highlighted band is the player’s · dashed line is the target

Target 2,300

99.4% below 2,300 (82,133 of 82,596; 99.3% below 2,288)

Percentile over time · United States

99.3% higher than · Oct 2026 · rank #497 of 82,596

Since Dec 2025
-0.1 pts

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 Ohio 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 Koo, Oliver T
Month	Regular	Quick	Blitz
Oct 2026	2,288no change	2,225no change	2,164no change
Sep 2026	2,288no change	2,225no change	2,164no change
Aug 2026	2,288no change	2,225no change	2,164no change
Jul 2026	2,288no change	2,225no change	2,164no change
Jun 2026	2,288no change	2,225no change	2,164no change
May 2026	2,288-9	2,225no change	2,164no change
Apr 2026	2,297no change	2,225no change	2,164no change
Mar 2026	2,297no change	2,225no change	2,164no change
Feb 2026	2,297no change	2,225no change	2,164no change
Jan 2026	2,297no change	2,225no change	2,164no change
Dec 2025	2,297	2,225	2,164

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