USCF player statistics

Lan, William

USCF 30789361PennsylvaniaUpdated: Oct 2026
Official US Chess record

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Gender
Male
FIDE
FIDE 566009995
US Chess reported rank
#5,527 national · #204 in state
Floor
Regular 1,600 · Quick 1,500 · Blitz 133
Rated games
Blitz 25

US Chess record as of Sep 16, 2026

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Rating format

Regular rating

1,783-27 since Sep 2026

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

Oct 20261,783 Regular
Dec 2025: 1736Jan 2026: 1718Feb 2026: 1702Mar 2026: 1709Apr 2026: 1697May 2026: 1714Jun 2026: 1779Jul 2026: 1744Aug 2026: 1814Sep 2026: 1810Oct 2026: 1783
Dec 2025Oct 2026
11 updates in this window · +47 first to last · open points are provisional · guides mark US Chess classes · unpublished months are skipped, not inactivity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

  • -133 Quick vs Regular

    Typical for 1,700–1,799 regular players: -124 (middle half -209 to -70, 1,897 established members). This gap is within the typical range.

  • -287 Blitz vs Regular

    Typical for 1,700–1,799 regular players: -211 (middle half -332 to -94, 917 established members). This gap is within the typical range.

How this rating moves

Between consecutive published observations, provisional included.

Biggest gain
+70
Jul 2026 to Aug 2026
Biggest drop
-35
Jun 2026 to Jul 2026
Longest rise
2 updates
+82 from Apr 2026 to Jun 2026
Updates that moved
10 of 10
Latest -27, Sep 2026 to Oct 2026
Typical move
±27
Mean absolute change; spread ±36.4

Regular rating in context

Oct 2026 update

United States

#8,206of 82,596 rated members · higher than 90%

74,362 lower · 29 same rating · 8,205 higher · ties share a rank

Pennsylvania

#321of 2,576 rated members · higher than 87.4%

2,252 lower · 4 same rating · 320 higher · ties share a rank

Where this rating sits · United States

82,596 rated members in 50-point bands · median 800–849 · 5,614 within 100 points of 1,783 (this player included)

Player · 1,783
01,4502,900

1,750–1,799: 1,185 members (1.4%) · highlighted band is the player’s · dashed line is the target

90.4% below 1,800 (74,742 of 82,596; 90% below 1,783)

Percentile over time · United States

90% higher than · Oct 2026 · rank #8,206 of 82,596

Since Dec 2025
+1.5 pts

Dec 2025: higher than 88.5% (rank 9,282 of 81,102)Jan 2026: higher than 87.7% (rank 9,693 of 79,487)Feb 2026: higher than 87.3% (rank 10,580 of 83,940)Mar 2026: higher than 87.5% (rank 10,039 of 80,605)Apr 2026: higher than 86.8% (rank 10,585 of 80,831)May 2026: higher than 87.7% (rank 9,906 of 81,236)Jun 2026: higher than 90% (rank 8,235 of 83,290)Jul 2026: higher than 89% (rank 9,051 of 82,736)Aug 2026: higher than 91.4% (rank 7,040 of 83,080)Sep 2026: higher than 91.2% (rank 7,246 of 83,635)Oct 2026: higher than 90% (rank 8,206 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 Pennsylvania 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 Lan, William
MonthRegularQuickBlitz
Oct 20261,783-271,650-411,496no change
Sep 20261,810-41,691+51,496no change
Aug 20261,814+701,686+661,496no change
Jul 20261,744-351,620-221,496+27
Jun 20261,779+651,642+71,469 Pno change · 15 games
May 20261,714+171,635-61,469 Pno change · 15 games
Apr 20261,697-121,641+171,469 Pno change · 15 games
Mar 20261,709+71,624+441,469 Pno change · 15 games
Feb 20261,702-161,580-571,469 Pno change · 15 games
Jan 20261,718-181,637-291,469 Pno change · 15 games
Dec 20251,7361,6661,469 P15 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.