USCF player statistics

Heimann, Mark

USCF 12802899CaliforniaUpdated: Oct 2026
Official US Chess record

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Gender
Male
FIDE title
G
FIDE
FIDE 2028441
US Chess reported rank
#66 national · #6 in state
Floor
Regular 2,200 · Quick 1,900 · Blitz 2,100 · Online Quick 2,100

US Chess record as of Sep 15, 2026

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Rating format

Regular rating

2,549-10 since Sep 2026

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

Oct 20262,549 Regular
Dec 2025: 2602Jan 2026: 2599Feb 2026: 2590Mar 2026: 2593Apr 2026: 2547May 2026: 2547Jun 2026: 2547Jul 2026: 2559Aug 2026: 2559Sep 2026: 2559Oct 2026: 2549
Dec 2025Oct 2026
11 updates in this window · -53 first to last · open points are provisional · guides mark US Chess classes · unpublished months are skipped, not inactivity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

  • -404 Quick vs Regular

    Typical for 2,500–2,599 regular players: -175 (middle half -344 to -14, 59 established members). This gap is below the typical range.

  • -67 Blitz vs Regular

    Typical for 2,500–2,599 regular players: -104 (middle half -228 to -30, 48 established members). This gap is within the typical range.

  • -132 Online Quick vs Regular

    No national baseline for this rating band yet.

How this rating moves

Between consecutive published observations, provisional included.

Biggest gain
+12
Jun 2026 to Jul 2026
Biggest drop
-46
Mar 2026 to Apr 2026
Longest rise
1 update
+12 from Jun 2026 to Jul 2026
Updates that moved
6 of 10
Latest -10, Sep 2026 to Oct 2026
Typical move
±8
Mean absolute change; spread ±15.6

Regular rating in context

Oct 2026 update

United States

#84of 82,596 rated members · higher than 99.8%

82,512 lower · 1 same rating · 83 higher · ties share a rank

California

#13of 9,083 rated members · higher than 99.8%

9,070 lower · 1 same rating · 12 higher · ties share a rank

Where this rating sits · United States

82,596 rated members in 50-point bands · median 800–849 · 145 within 100 points of 2,549 (this player included)

Player · 2,549
01,4502,900

2,500–2,549: 30 members (0%) · highlighted band is the player’s · dashed line is the target

99.8% below 2,550 (82,513 of 82,596; 99.8% below 2,549)

Percentile over time · United States

99.8% higher than · Oct 2026 · rank #84 of 82,596

Since Dec 2025
-0.1 pts

Dec 2025: higher than 99.9% (rank 46 of 81,102)Jan 2026: higher than 99.9% (rank 51 of 79,487)Feb 2026: higher than 99.9% (rank 55 of 83,940)Mar 2026: higher than 99.9% (rank 52 of 80,605)Apr 2026: higher than 99.8% (rank 86 of 80,831)May 2026: higher than 99.8% (rank 85 of 81,236)Jun 2026: higher than 99.8% (rank 88 of 83,290)Jul 2026: higher than 99.9% (rank 77 of 82,736)Aug 2026: higher than 99.9% (rank 76 of 83,080)Sep 2026: higher than 99.9% (rank 77 of 83,635)Oct 2026: higher than 99.8% (rank 84 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 California 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 Heimann, Mark
MonthRegularQuickBlitzOnline Quick
Oct 20262,549-102,145no change2,482+212,417no change
Sep 20262,559no change2,145no change2,461no change2,417no change
Aug 20262,559no change2,145+142,461+132,417no change
Jul 20262,559+122,131no change2,448no change2,417no change
Jun 20262,547no change2,131no change2,448no change2,417no change
May 20262,547no change2,131+262,448no change2,417no change
Apr 20262,547-462,105no change2,448-22,417no change
Mar 20262,593+32,105no change2,450+32,417no change
Feb 20262,590-92,105no change2,447-162,417no change
Jan 20262,599-32,105no change2,463no change2,417no change
Dec 20252,6022,1052,4632,417
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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.