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.
Sean Vibbert - Constructive Chess Feedback
Sean, you've demonstrated solid foundational skills in your recent games, showing good opening knowledge and active piece play. Here are some tailored suggestions to help elevate your performance further:
Strengths
- Opening Preparation: You are comfortable with flexible openings like the Sicilian and Reti systems, and you're not afraid to take on dynamic pawn structures, which indicates a good understanding of opening principles.
- Piece Activity: You've utilized your knights and bishops effectively to create threats and control key squares, especially in the middlegame transitions.
- Endgame Technique: Your ability to push passed pawns and coordinate your king and pieces in endgames shows promising endgame knowledge.
Areas for Improvement
- Tactical Awareness: Review critical moments for tactical inaccuracies. For example, in some games, moves like early exchanges or missed captures could have been improved with precise calculation. Spend additional time practicing tactical puzzles to sharpen this skill.
- King Safety and Timing of Castling: In a few games, the decision of when to castle or how to safeguard your king could be optimized. Prioritize king safety early to avoid sudden attacks, especially during open middlegame positions.
- Handling Counterplay: You’ve encountered opponents who capitalize on pawn breaks and piece activity in your position. Work on recognizing and preempting your opponent's counterplay opportunities.
Practical Recommendations
- Regularly analyze your lost games with the focus on pinpointing where the turning points occurred — understanding these can prevent repetition of similar mistakes.
- Consider studying thematic middlegame ideas for your preferred openings – deepen your understanding of typical plans and pawn structures.
- Use training sessions to improve calculation under time pressure, as several games ended in rapid tactically decisive moments.
Final Thought
Chess improvement is a steady journey. You're laying down a great foundation — keep building on it by combining analysis, focused practice, and practical play. Celebrate your wins, learn from losses, and stay curious about the rich complexities of the game.
🆚 Opponent Insights
| Most Played Opponents | ||
|---|---|---|
| Kimberly Liu | 134W / 45L / 16D | |
| canwedoit | 31W / 72L / 6D | |
| Tiago Pereira Rodrigues | 25W / 29L / 4D | |
| Rick Sun | 19W / 24L / 5D | |
| Devina Devagharan | 34W / 8L / 5D | |
Rating
| Year | Bullet | Blitz | Rapid | Daily |
|---|---|---|---|---|
| 2025 | 2709 | 2571 | ||
| 2024 | 2733 | 2571 | ||
| 2023 | 2660 | 2509 | ||
| 2022 | 2585 | 2585 | ||
| 2021 | 2587 | 2560 | 2000 | |
| 2020 | 2634 | 2442 | 2250 | |
| 2019 | 2374 |
Stats by Year
| Year | White | Black | Moves |
|---|---|---|---|
| 2025 | 4W / 4L / 1D | 3W / 3L / 3D | 106.4 |
| 2024 | 101W / 111L / 22D | 104W / 102L / 18D | 100.2 |
| 2023 | 62W / 67L / 10D | 55W / 71L / 11D | 96.9 |
| 2022 | 37W / 21L / 5D | 35W / 18L / 11D | 79.3 |
| 2021 | 123W / 42L / 17D | 125W / 41L / 16D | 88.2 |
| 2020 | 197W / 138L / 29D | 192W / 137L / 28D | 82.3 |
| 2019 | 82W / 26L / 11D | 60W / 38L / 15D | 86.9 |
Openings: Most Played
| Blitz Opening | Games | Wins | Losses | Draws | Win Rate |
|---|---|---|---|---|---|
| Sicilian Defense: Closed | 46 | 32 | 10 | 4 | 69.6% |
| Amar Gambit | 22 | 13 | 7 | 2 | 59.1% |
| Colle System: Rhamphorhynchus Variation | 20 | 12 | 5 | 3 | 60.0% |
| Unknown | 20 | 10 | 9 | 1 | 50.0% |
| Scandinavian Defense | 15 | 13 | 0 | 2 | 86.7% |
| Sicilian Defense: Alapin Variation, Sherzer Variation | 13 | 9 | 3 | 1 | 69.2% |
| Sicilian Defense: Alapin Variation | 12 | 7 | 2 | 3 | 58.3% |
| French Defense | 10 | 5 | 4 | 1 | 50.0% |
| Amazon Attack | 10 | 7 | 3 | 0 | 70.0% |
| Sicilian Defense | 9 | 5 | 3 | 1 | 55.6% |
| Bullet Opening | Games | Wins | Losses | Draws | Win Rate |
|---|---|---|---|---|---|
| Colle System: Rhamphorhynchus Variation | 278 | 134 | 128 | 16 | 48.2% |
| Sicilian Defense: Closed | 124 | 73 | 40 | 11 | 58.9% |
| Amar Gambit | 112 | 57 | 50 | 5 | 50.9% |
| Nimzo-Larsen Attack | 83 | 30 | 45 | 8 | 36.1% |
| Nimzo-Larsen Attack: Classical Variation | 68 | 30 | 33 | 5 | 44.1% |
| Sicilian Defense: Alapin Variation, Sherzer Variation | 53 | 31 | 19 | 3 | 58.5% |
| Caro-Kann Defense | 44 | 22 | 16 | 6 | 50.0% |
| Scandinavian Defense | 43 | 22 | 17 | 4 | 51.2% |
| French Defense | 40 | 23 | 15 | 2 | 57.5% |
| King's Indian Attack | 36 | 17 | 14 | 5 | 47.2% |
| Daily Opening | Games | Wins | Losses | Draws | Win Rate |
|---|---|---|---|---|---|
| Sicilian Defense: Alapin Variation, Sherzer Variation | 1 | 1 | 0 | 0 | 100.0% |
| Petrov's Defense | 1 | 1 | 0 | 0 | 100.0% |
| Rapid Opening | Games | Wins | Losses | Draws | Win Rate |
|---|---|---|---|---|---|
| Ruy Lopez: Brix Variation | 1 | 0 | 1 | 0 | 0.0% |
| Slav Defense | 1 | 0 | 0 | 1 | 0.0% |
| Ruy Lopez: Berlin Defense, Berlin Wall | 1 | 1 | 0 | 0 | 100.0% |
| Bird Opening: Dutch Variation, Batavo Gambit | 1 | 0 | 1 | 0 | 0.0% |
| Ruy Lopez: Morphy Defense, Modern Steinitz Defense | 1 | 1 | 0 | 0 | 100.0% |
| Sicilian Defense: Taimanov Variation, Bastrikov Variation | 1 | 0 | 0 | 1 | 0.0% |
🔥 Streaks
| Streak | Longest | Current |
|---|---|---|
| Winning | 19 | 1 |
| Losing | 11 | 0 |