Format
Heimann, Mark
GM🇺🇸FIDE 2028441· Male· United States of America· Born in 1993
Follow Mark HeimannTrack his monthly FIDE ratings, games, tournaments and more.
Mark Heimann, a 33-year-old American Grandmaster, is rated 2479 and sitting in the top 1% of American players, and in the top 1% worldwide. He has slipped back 33 Elo over the past 12 months. 56 rated games in the past year (≈22/year long-term). Recent standard appearances include 2026 Saint Louis Masters, 23rd Konig Memorial Tournament - 2000 and Over, and 17th Annual Golden State Open - Major. Also played 1 rapid (including 2025 September Mechanics' Weekend - Rapid) and 4 blitz events (including The American Cup 2026 - Blitz) recently. He had 2 career breaks: 27 months (2009–2012) and 19 months (2015–2016). His peak of 2520 was reached at age 32 (Sep 2025, World #461 at the time).
Awarded GM in 2025 (age 32), IM in 2023 (age 30), and FM in 2016 (age 23). At junior level, he reached World #44 in U16, World #16 in U14 and #9 and #8 nationally in U20 and U18.
Current rating
2479
Standard
Rpd2436·Blz2417
All-time high
2520
−41 pts below
Sep 2025 · age 32
Sep 2025 · age 32
Activity
75
games / yr avg. · ≈6/mo
56 past 12 mo · ≈5/mo
classical only
Active
classical only
Active
Signature stat
Top 1%
#51 · American players · of 4,932
Career timeline
20 entries2025
Peak World rank: #461
at age 32 · rated 2520
Oct 2025
All-time peak 2520
at age 32 · −41 from today
Sep 2025
GM title awardedGM
at age 32 · 2025 1st FIDE Council
Apr 2025
Peak American rank: #35
at age 32 · rated 2512
Mar 2025
Best 12-month gain (+77 Elo)
2435 → 2512
Feb 2025
Crossed 2500
at age 32
Jan 2025
Standard rating history
Activity & highlights
Top opponent
Evolution
-30
2509 → 2479
Tournaments
8
53 games
Score
38.5/ 5372.6%
30W17D6L
Top 3 wins
Top 3 losses
Last 12 months — tournaments
8 events| Event | Date | Score | Rank | Perf | Δ Elo |
|---|---|---|---|---|---|
Open Swiss | Feb 2026 | 3.5/9 | #55 | 2210 | -34.3 |
Swiss | Jan 2026 | 3/3 | #6 | 2722 | +2.4 |
Open Swiss | Jan 2026 | 5/6 | #4 | 2331 | -3.0 |
Swiss | Jan 2026 | 3.5/5 | #6 | 2422 | -3.7 |
Open Swiss | Nov 2025 | 7/9 | #2 | 2459 | -1.5 |
Open Swiss | Jul 2025 | 6/8 | #21 | 2517 | +1.5 |
Round-Robin | Jul 2025 | 6.5/9 | #1 | 2548 | +5.3 |
Swiss | May 2025 | 4/4 | #1 | 2830 | +3.5 |
Most-Played Opponents
vsChristopher Woojin YooGM
🇺🇸USA·2607
+0 −7 =2
9 games·last met Jan 2026
View head-to-head →
vsJoshua PosthumaIM
🇺🇸USA·2378
+3 −0 =5
8 games·last met Nov 2023
View head-to-head →
vsRose AtwellFM
🇺🇸USA·2383
+3 −1 =3
7 games·last met Mar 2026
View head-to-head →
vsSivavishnu Srinivasan
🇺🇸USA·1950
+6 −0 =0
6 games·last met Jan 2026
View head-to-head →
vsJosiah StearmanIM
🇺🇸USA·2481
+0 −4 =2
6 games·last met May 2024
View head-to-head →
Rankings
/
United States of America
#51
out of 5,412 players
Americas
#93
in continent
World
#743
out of 400,000+
National ranking
Europe & World
Europe
World
United States of America
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Americas
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| 2 | 🇺🇸Follow Fabiano CaruanaTrack their monthly FIDE ratings, games, tournaments and more. | 2,788 |
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| 5 | 🇺🇸Follow Hans Moke NiemannTrack their monthly FIDE ratings, games, tournaments and more. | 2,728 |
| 6 | 🇺🇸Follow Levon AronianTrack their monthly FIDE ratings, games, tournaments and more. | 2,724 |
| 7 | 🇺🇸Follow Awonder LiangTrack their monthly FIDE ratings, games, tournaments and more. | 2,718 |
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