USCF player statistics

Orellana, Zechariah J

USCF 16574801ArizonaUpdated: Nov 2026

Official US Chess record

Gender: Male
FIDE: FIDE 0
Floor: Regular 150 · Quick 150 · Blitz 125
Rated games: Blitz 22

US Chess record as of Sep 15, 2026

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Regular rating

1,421+128 since Oct 2026

Published rating · Nov 2026 · 12 published updates since Dec 2025

Nov 20261,421 Regular

Compare format

Dec 2025Nov 2026

12 updates in this window · +123 first to last · open points are provisional · guides mark US Chess classes · unpublished months are skipped, not inactivity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

-36 Quick vs Regular
Typical for 1,400–1,499 regular players: -85 (middle half -160 to -36, 2,037 established members). This gap is within the typical range.
-262 Blitz vs Regular (provisional)
Typical for 1,400–1,499 regular players: -195 (middle half -346 to -64, 683 established members). This gap is within the typical range.

How this rating moves

Between consecutive published observations, provisional included.

Biggest gain: +128; Oct 2026 to Nov 2026
Biggest drop: -16; Jan 2026 to Feb 2026
Longest rise: 1 update; +128 from Oct 2026 to Nov 2026
Updates that moved: 3 of 11; Latest +128, Oct 2026 to Nov 2026
Typical move: ±14; Mean absolute change; spread ±39.2

Regular rating in context

Nov 2026 update

United States

#19,997of 83,032 rated members · higher than 75.8%

62,997 lower · 39 same rating · 19,996 higher · ties share a rank

Arizona

#462of 1,707 rated members · higher than 72.8%

1,243 lower · 3 same rating · 461 higher · ties share a rank

Where this rating sits · United States

83,032 rated members in 50-point bands · median 850–899 · 7,064 within 100 points of 1,421 (this player included)

Player · 1,421

01,4252,850

1,400–1,449: 1,880 members (2.2%) · highlighted band is the player’s · dashed line is the target

Target 1,450

77% below 1,450 (63,991 of 83,032; 75.8% below 1,421)

Percentile over time · United States

75.8% higher than · Nov 2026 · rank #19,997 of 83,032

Since Dec 2025
+5 pts

Dec 2025Nov 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 Nov 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 Arizona 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 Orellana, Zechariah J
Month	Regular	Quick	Blitz
Nov 2026	1,421+128	1,385+139	1,159 Pno change · 22 games
Oct 2026	1,293no change	1,246no change	1,159 Pno change · 22 games
Sep 2026	1,293no change	1,246no change	1,159 Pno change · 22 games
Aug 2026	1,293no change	1,246no change	1,159 Pno change · 22 games
Jul 2026	1,293no change	1,246no change	1,159 Pno change · 22 games
Jun 2026	1,293no change	1,246no change	1,159 Pno change · 22 games
May 2026	1,293no change	1,246no change	1,159 Pno change · 22 games
Apr 2026	1,293no change	1,246no change	1,159 Pno change · 22 games
Mar 2026	1,293no change	1,246no change	1,159 Pno change · 22 games
Feb 2026	1,293-16	1,246-15	1,159 Pno change · 22 games
Jan 2026	1,309+11	1,261+9	1,159 Pno change · 22 games
Dec 2025	1,298	1,252	1,159 P22 games

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