USCF player statistics

Cotter, William

USCF 10005191MassachusettsUpdated: Oct 2026
Official US Chess record

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Gender
Male

US Chess record as of Sep 14, 2026

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Rating format

Regular rating

2,1890 since Sep 2026

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

Oct 20262,189 Regular
Dec 2025: 2189Jan 2026: 2189Feb 2026: 2189Mar 2026: 2189Apr 2026: 2189May 2026: 2189Jun 2026: 2189Jul 2026: 2189Aug 2026: 2189Sep 2026: 2189Oct 2026: 2189
Dec 2025Oct 2026
11 updates in this window · 0 first to last · open points are provisional · guides mark US Chess classes · unpublished months are skipped, not inactivity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.

How this rating moves

Between consecutive published observations, provisional included.

Biggest gain
—
No gain between published updates yet
Biggest drop
—
No drop between published updates yet
Longest rise
—
No consecutive gains yet
Current run
10 updates
Unchanged since Dec 2025
Typical move
±0
Mean absolute change; spread ±0

Regular rating in context

Oct 2026 update

United States

#1,191of 82,596 rated members · higher than 98.5%

81,393 lower · 13 same rating · 1,190 higher · ties share a rank

Massachusetts

#49of 1,673 rated members · higher than 97%

1,624 lower · 1 same rating · 48 higher · ties share a rank

Where this rating sits · United States

82,596 rated members in 50-point bands · median 800–849 · 1,499 within 100 points of 2,189 (this player included)

Player · 2,189
01,4502,900

2,150–2,199: 314 members (0.3%) · highlighted band is the player’s · dashed line is the target

98.6% below 2,200 (81,466 of 82,596; 98.5% below 2,189)

Percentile over time · United States

98.5% higher than · Oct 2026 · rank #1,191 of 82,596

Since Dec 2025
0 pts

Dec 2025: higher than 98.5% (rank 1,155 of 81,102)Jan 2026: higher than 98.5% (rank 1,133 of 79,487)Feb 2026: higher than 98.5% (rank 1,172 of 83,940)Mar 2026: higher than 98.5% (rank 1,145 of 80,605)Apr 2026: higher than 98.5% (rank 1,148 of 80,831)May 2026: higher than 98.5% (rank 1,153 of 81,236)Jun 2026: higher than 98.6% (rank 1,155 of 83,290)Jul 2026: higher than 98.6% (rank 1,147 of 82,736)Aug 2026: higher than 98.5% (rank 1,161 of 83,080)Sep 2026: higher than 98.5% (rank 1,178 of 83,635)Oct 2026: higher than 98.5% (rank 1,191 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 Massachusetts 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 Cotter, William
MonthRegular
Oct 20262,189no change
Sep 20262,189no change
Aug 20262,189no change
Jul 20262,189no change
Jun 20262,189no change
May 20262,189no change
Apr 20262,189no change
Mar 20262,189no change
Feb 20262,189no change
Jan 20262,189no change
Dec 20252,189
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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.