Mark Heimann (mmmflatbread): Grandmaster of Online Speed Chess
Mark Heimann, known to the online chess world as mmmflatbread, is a FIDE Grandmaster who has built an empire in the fastest corners of the game. Across more than 40,000 analyzed games, he has established himself as one of the most prolific speed chess players on the platform. His preferred time control is blitz, and he reached a peak blitz rating of 3041 (2026-04-25) in April 2026. His bullet rating also soared to 2937 (2021-05-15) in 2021, proving he is just as dangerous in the fastest format of all.
A Meteoric Rise: From 1375 to 3000
Mark's online journey began modestly in March 2017, when his first recorded blitz rating was just 1375. Within weeks, he was already playing at a 2430 level, one of the fastest ascents imaginable. He then shifted into overdrive in bullet chess, playing 1,572 games in August 2017 alone. Across a five-month stretch in 2017, he played more than 6,500 bullet games, an almost superhuman volume.
The chart above shows his blitz rating climbing steadily through the late 2010s, reaching the 2800s by 2019 and surging past 2900 in the mid-2020s. His end-of-year blitz ratings have stayed remarkably high, including 2828 in 2019, 2829 in 2020, 2911 in 2024 and 2946 in 2026. Against elite competition, his strength-adjusted win rate remains right around 50%, a sign of a player who belongs at the very top.
Playing Style and Opening Repertoire
With the white pieces, Mark is a committed 1.e4 player who loves open, tactical battles. He is equally at home in the wildest sidelines, and the Amar Gambit is among his most played openings in both bullet and blitz. He also scores consistently in classical systems, including the Caro-Kann Defense, the Scandinavian Defense and the Sicilian Defense.
- Amar Gambit: 55.63% win rate in blitz, 56.24% in bullet.
- Caro-Kann Defense: his most played blitz opening with 884 games.
- Scandinavian Defense: 56.96% win rate in blitz.
- Sicilian Defense: 54.70% win rate in blitz.
His endgame play is a hidden superpower. Endgames appear in 83.41% of his games, and he stages comebacks at a remarkable 84.65% rate. Even after losing a piece, he still wins half his games, which makes him one of the most exhausting opponents on the internet.
Rivalries That Built His Legend
Mark has faced Leo Bispo 325 times, more than any other player, and he owns that rivalry with 219 wins. The series against Safal Bora is far more balanced, with want2lose holding a 78 to 65 edge. blitzstream has also gotten the better of him, leading 75 to 57. Regular sparring partners benecyrill, chameleon_94 and masterleif have each crossed swords with him more than 130 times.
Streaks, Quirks and Surprises
Here is the strangest fact in Mark's profile: he has never lost a game of Daily chess. His daily record is a perfect 37 wins and 0 losses. He also plays his best chess in the morning, posting a 56.52% win rate at 10:00 AM, and he converts at 60.94% against lower-rated opponents. Mark's longest winning streak is 17 games, while his longest losing streak is 11, a gentle reminder that even grandmasters can have a rough night.
- Longest winning streak: 17 games
- Longest losing streak: 11 games
- White win rate: 54.38%
- Black win rate: 50.50%
- Win rate after losing a piece: 50.05%