Sean Semmler: The Chessboard Biologist
Sean Semmler is a masterful chess player who approaches the game much like a biologist studies nature — with curiosity, strategy, and a healthy dose of resilience. With a peak Bullet rating soaring to 1478 in 2025 and a Rapid rating cresting at 1536, Sean's playstyle evolves year by year, much like a fascinating evolutionary specimen adapting to the environment of 64 squares.
Born from humble beginnings with a Bullet rating of 314 in 2020, Sean has rapidly multiplied his skills, showcasing an impressive blend of tactical DNA. His win-rate with the Scandinavian Defense in Bullet (59.4%) and the Queen's Pawn Opening (58.75%) highlights his strategic evolution and sharp instincts. Even when pieces fall as if by natural selection, Sean exhibits an astonishing 100% win rate after losing a piece—proof that survival and comeback are encoded in his very chess genome.
Sean's playing style is a dance of patient evolution and fierce battles, with an average of nearly 62 moves per win and a penchant for endgames in nearly 63% of his games. Though his tilt factor suggests a few moments of emotional mutation, his overall psychological resilience helps him stay on top of his form, avoiding the predators of frustration.
Whether it's blitzing through opponents with a Queen's Gambit or patiently outmaneuvering foes in rapid fire duels, Sean Semmler is a living organism in the ecosystem of chess — constantly adapting, thriving, and evolving in the wild. With a longest winning streak of 13 and tactical intelligence that would make any chess-honed Darwin proud, Sean is always ready to make his next clever move.
When not dissecting complex positions or engineering checkmates, Sean seems to enjoy a chuckle, embracing the humor of chess's biological parallels—because in this game, sometimes you just have to capture the opportunity before it mutates away.
🆚 Opponent Insights
| Most Played Opponents | ||
|---|---|---|
| asyal816 | 12W / 8L / 2D | |
| leogagatam | 8W / 14L / 0D | |
| patricioandresah | 4W / 13L / 1D | |
| bedil | 12W / 5L / 0D | |
| Jalin_Rabey | 4W / 10L / 2D | |
Rating
| Year | Bullet | Blitz | Rapid | Daily |
|---|---|---|---|---|
| 2025 | 1340 | 1252 | 1510 | |
| 2024 | 1246 | 1134 | 1408 | 586 |
| 2023 | 920 | |||
| 2022 | 1067 | |||
| 2021 | 1208 | 1068 | ||
| 2020 | 1188 | 1054 | 1166 |
Stats by Year
| Year | White | Black | Moves |
|---|---|---|---|
| 2025 | 206W / 162L / 19D | 173W / 195L / 17D | 68.3 |
| 2024 | 608W / 547L / 44D | 595W / 576L / 29D | 59.8 |
| 2023 | 2W / 6L / 0D | 5W / 3L / 1D | 59.6 |
| 2022 | 0W / 1L / 0D | 1W / 0L / 0D | 64.0 |
| 2021 | 4W / 3L / 0D | 4W / 3L / 0D | 57.5 |
| 2020 | 600W / 542L / 42D | 595W / 541L / 59D | 60.6 |
Openings: Most Played
| Blitz Opening | Games | Wins | Losses | Draws | Win Rate |
|---|---|---|---|---|---|
| Queens Gambit Accepted Old Variation | 128 | 68 | 51 | 9 | 53.1% |
| Scandinavian Defense | 128 | 70 | 53 | 5 | 54.7% |
| French Defense Knight Variation | 93 | 47 | 38 | 8 | 50.5% |
| Queens Pawn Opening | 86 | 44 | 38 | 4 | 51.2% |
| Scandinavian Defense Mieses Kotrc Variation | 66 | 30 | 31 | 5 | 45.5% |
| Kings Pawn Opening | 50 | 26 | 20 | 4 | 52.0% |
| Alekhines Defense Scandinavian Variation | 48 | 26 | 21 | 1 | 54.2% |
| French Defense | 47 | 23 | 22 | 2 | 48.9% |
| Kings Pawn Opening Kings Knight Variation | 46 | 22 | 22 | 2 | 47.8% |
| Englund Gambit | 44 | 24 | 19 | 1 | 54.5% |
| Bullet Opening | Games | Wins | Losses | Draws | Win Rate |
|---|---|---|---|---|---|
| Scandinavian Defense | 131 | 80 | 51 | 0 | 61.1% |
| Scandinavian Defense Mieses Kotrc Variation | 105 | 53 | 51 | 1 | 50.5% |
| Top Secret | 102 | 40 | 55 | 7 | 39.2% |
| Alekhines Defense Scandinavian Variation | 89 | 42 | 44 | 3 | 47.2% |
| Queens Pawn Opening | 78 | 47 | 30 | 1 | 60.3% |
| French Defense Knight Variation | 77 | 40 | 34 | 3 | 52.0% |
| Scotch Game | 72 | 38 | 29 | 5 | 52.8% |
| Van t Kruijs Opening | 50 | 28 | 22 | 0 | 56.0% |
| Kings Pawn Opening | 50 | 24 | 26 | 0 | 48.0% |
| Modern Defense with | 49 | 26 | 21 | 2 | 53.1% |
| Daily Opening | Games | Wins | Losses | Draws | Win Rate |
|---|---|---|---|---|---|
| Scotch Game | 2 | 2 | 0 | 0 | 100.0% |
| Sicilian Defense Anti Qxd4 Move Order | 1 | 1 | 0 | 0 | 100.0% |
| Kings Pawn Opening Kings Knight Variation | 1 | 1 | 0 | 0 | 100.0% |
| Ruy Lopez Opening | 1 | 1 | 0 | 0 | 100.0% |
| Petrovs Defense Classical Variation | 1 | 0 | 1 | 0 | 0.0% |
| Grob Opening Grob Gambit Declined | 1 | 0 | 1 | 0 | 0.0% |
| Queens Pawn Opening | 1 | 1 | 0 | 0 | 100.0% |
| Queens Pawn Opening Accelerated London System | 1 | 0 | 1 | 0 | 0.0% |
| Ruy Lopez Opening Morphy Defense Bayreuth Variation | 1 | 1 | 0 | 0 | 100.0% |
| Sicilian Defense Smith Morra Gambit | 1 | 1 | 0 | 0 | 100.0% |
| Rapid Opening | Games | Wins | Losses | Draws | Win Rate |
|---|---|---|---|---|---|
| French Defense Exchange Variation | 8 | 5 | 3 | 0 | 62.5% |
| Scotch Game | 5 | 2 | 3 | 0 | 40.0% |
| Philidor Defense | 4 | 2 | 2 | 0 | 50.0% |
| Caro Kann Defense Exchange Variation | 3 | 0 | 3 | 0 | 0.0% |
| Alapin Sicilian Defense | 3 | 1 | 2 | 0 | 33.3% |
| Scandinavian Defense Mieses Kotrc Variation | 3 | 3 | 0 | 0 | 100.0% |
| Caro Kann Defense | 3 | 3 | 0 | 0 | 100.0% |
| French Defense Knight Variation | 3 | 1 | 2 | 0 | 33.3% |
| Petrovs Defense Classical Variation | 3 | 3 | 0 | 0 | 100.0% |
| French Defense Steinitz Attack | 3 | 3 | 0 | 0 | 100.0% |
🔥 Streaks
| Streak | Longest | Current |
|---|---|---|
| Winning | 13 | 0 |
| Losing | 13 | 1 |