USCF player statistics

Kostas, Adam James

USCF 32628681South DakotaUpdated: Oct 2026
Official US Chess record

Enter an 8-digit USCF ID, or at least 3 letters of a name. Similar names in SD appear first.

Gender
Male
US Chess reported rank
#50 national · #1 in state
Floor
Regular 121
Rated games
Regular 5

US Chess record as of Aug 28, 2026

Find USCF-rated tournamentsBrowse upcoming events and entry requirements.
Rating format

Regular rating

2,583

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

Oct 20262,583 provisional
Dec 2025: 2583 provisionalJan 2026: 2583 provisionalFeb 2026: 2583 provisionalMar 2026: 2583 provisionalApr 2026: 2583 provisionalMay 2026: 2583 provisionalJun 2026: 2583 provisionalJul 2026: 2583 provisionalAug 2026: 2583 provisionalSep 2026: 2583 provisionalOct 2026: 2583 provisional
Dec 2025Oct 2026
11 updates in this window · open points are provisional · guides mark US Chess classes · unpublished months are skipped, not inactivity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

#56of 82,596 rated members · higher than 99.9%

82,539 lower · 2 same rating · 55 higher · ties share a rank

South Dakota

#1of 172 rated members · higher than 99.4%

171 lower · 1 same rating · 0 higher · ties share a rank

Where this rating sits · United States

82,596 rated members in 50-point bands · median 800–849 · 114 within 100 points of 2,583 (this player included)

Player · 2,583
01,4502,900

2,550–2,599: 34 members (0%) · highlighted band is the player’s · dashed line is the target

99.9% below 2,600 (82,547 of 82,596; 99.9% below 2,583)

Percentile over time · United States

99.9% higher than · Oct 2026 · rank #56 of 82,596

Since Dec 2025
0 pts

Dec 2025: higher than 99.9% (rank 62 of 81,102)Jan 2026: higher than 99.9% (rank 61 of 79,487)Feb 2026: higher than 99.9% (rank 60 of 83,940)Mar 2026: higher than 99.9% (rank 59 of 80,605)Apr 2026: higher than 99.9% (rank 58 of 80,831)May 2026: higher than 99.9% (rank 58 of 81,236)Jun 2026: higher than 99.9% (rank 56 of 83,290)Jul 2026: higher than 99.9% (rank 60 of 82,736)Aug 2026: higher than 99.9% (rank 56 of 83,080)Sep 2026: higher than 99.9% (rank 56 of 83,635)Oct 2026: higher than 99.9% (rank 56 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 South Dakota 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 Kostas, Adam James
MonthRegular
Oct 20262,583 Pno change · 5 games
Sep 20262,583 Pno change · 5 games
Aug 20262,583 Pno change · 5 games
Jul 20262,583 Pno change · 5 games
Jun 20262,583 Pno change · 5 games
May 20262,583 Pno change · 5 games
Apr 20262,583 Pno change · 5 games
Mar 20262,583 Pno change · 5 games
Feb 20262,583 Pno change · 5 games
Jan 20262,583 Pno change · 5 games
Dec 20252,583 P5 games
Chess67 DiscordChat with the Chess67 community.Open Find a chess tournamentUpcoming events near you.Browse Find a chess clubClubs and meetups near you.Browse

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.