FIDE Master Sean Vibbert: The Bullet Maestro
Sean Vibbert, aka Checksumme on the 64-square battlefield, is not your average chess player. Awarded the prestigious title of FIDE Master by FIDE, Sean is a bullet chess virtuoso whose speed and precision leave opponents blinking in disbelief.
Since bursting onto the scene in 2019 with a bullet rating near 1900, Sean swung through the ranks like a knight on steroids, reaching an astonishing peak rating of 2794 in bullet chess by 2024. As if lightning weren’t fast enough, Sean's bullet games average over 2600 rating points—a level mere mortals only dream about.
With over 900 wins and a winning rate slightly above 51% in bullet chess, Sean combines tactical sharpness with relentless energy. Perhaps most impressively, their comeback rate is a staggering 87.5%, and after losing a piece, Sean reportedly wins 99.3% of the time—proof that underdogs can bite hard.
When not blitzing pawns down the board, Sean also dabbles in blitz and rapid formats with respectable ratings in the 2500+ and 2300 ranges, showing versatility beyond just bullet speed. And for those who think rapid or daily games are tame, Sean’s 100% win rate in their rare daily matches reminds everyone they can take it slow and still dominate.
Sean has a playful, strategic style marked by a tendency to play long, intricate endgames (over 80 moves on average per win), proving patience is a virtue—even when you’re technically a bullet speedster.
Known for studying openings under the enigmatic label "Top Secret," and boasting some hilarious opponent records (like a 0% win rate against nicee_move9 but 100% against lailailaiking), Sean is a player who keeps fans guessing and opponents on their toes.
With a mental fortitude tested by an 11% tilt factor and a quirky habit of peaking wins around 1 a.m. and 7 p.m., Sean Vibbert embodies the spirit of a chess warrior: smart, fast, and just unpredictable enough to make the 64 squares their playground.
So next time you see the name Checksumme flashing on the leaderboard, remember: You’re witnessing a bullet master spinning the board like a whirlwind... and maybe losing a knight or two just for fun.