USCF player statistics

Eidemiller, Mark B

USCF 10145791PennsylvaniaUpdated: Oct 2026

Official US Chess record

Gender: Male
FIDE: FIDE 2009595
TD: N
US Chess reported rank: #798 national · #23 in state
Floor: Regular 2,200 · Quick 2,100

US Chess record as of Sep 14, 2026

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Regular rating

2,2070 since Sep 2026

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

Oct 20262,207 Regular

Compare format

Dec 2025Oct 2026

11 updates in this window · -3 first to last · open points are provisional · guides mark US Chess classes · unpublished months are skipped, not inactivity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

0 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.

How this rating moves

Between consecutive published observations, provisional included.

Biggest gain: —; No gain between published updates yet
Biggest drop: -3; Aug 2026 to Sep 2026
Longest rise: —; No consecutive gains yet
Current run: 1 update; Unchanged since Sep 2026
Typical move: ±0; Mean absolute change; spread ±0.9

Regular rating in context

Oct 2026 update

United States

#929of 82,596 rated members · higher than 98.8%

81,657 lower · 11 same rating · 928 higher · ties share a rank

Pennsylvania

#30of 2,576 rated members · higher than 98.8%

2,546 lower · 1 same rating · 29 higher · ties share a rank

Where this rating sits · United States

82,596 rated members in 50-point bands · median 800–849 · 1,361 within 100 points of 2,207 (this player included)

Player · 2,207

01,4502,900

2,200–2,249: 483 members (0.5%) · highlighted band is the player’s · dashed line is the target

Target 2,250

99.2% below 2,250 (81,949 of 82,596; 98.8% below 2,207)

Percentile over time · United States

98.8% higher than · Oct 2026 · rank #929 of 82,596

Since Dec 2025
0 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 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 Eidemiller, Mark B
Month	Regular	Quick
Oct 2026	2,207no change	2,207no change
Sep 2026	2,207-3	2,207no change
Aug 2026	2,210no change	2,207no change
Jul 2026	2,210no change	2,207no change
Jun 2026	2,210no change	2,207no change
May 2026	2,210no change	2,207no change
Apr 2026	2,210no change	2,207no change
Mar 2026	2,210no change	2,207no change
Feb 2026	2,210no change	2,207no change
Jan 2026	2,210no change	2,207no change
Dec 2025	2,210	2,207

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