Sebastian Kostolansky - International Master Extraordinaire
Meet Sebastian Kostolansky, the chess maestro known online as selvas123. An International Master certified by the grand overlords of chess at FIDE, Sebastian is no stranger to the battlefield of 64 squares. His journey through pawns and knights has been as thrilling as a roller coaster with more twists than a Sicilian Defense.
Rise of a Tactical Titan
From humble beginnings with a blitz rating below 1500 in 2017, Sebastian charged through the ranks like a knight on a mission. By 2025, he had skyrocketed to a scorching peak blitz rating of 2882 and a bullet rating cresting at 2857. If speed chess were an Olympic sport, he'd be the Usain Bolt of the board – faster and sharper than most can blink.
Style and Strategy
Sebastian’s playstyle is a blend of deep strategic understanding and fiendish tactical awareness. With an 82.67% frequency of bringing endgames to the table and an impressive 83.77% comeback rate when trailing, he is both patient and relentless. His average winning game lasts a robust 74 moves, proving he doesn’t shy away from a marathon when victory demands it. Fun fact: he’s best known for grinding out wins in openings kept so secret even his chess friends are left guessing.
Favorite Openings
- Blitz Favorite: "Top Secret" — a mysterious favorite that’s rattled opponents over 2600 times!
- Sicilian Defense Nyezhmetdinov Rossolimo Attack: With a 75% win rate, it’s his spicy weapon of choice.
- Queens Gambit Declined Charousek Variation: Developed to perfection with a 75% success rate.
Psychology & Quirks
Sebastian’s psychological resilience is legendary. With a tilt factor of just 14, he keeps his cool even when the chess gods throw curveballs. His secret weapon? Playing best in the wee hours – around 3 AM – when the rest of us are just dreaming of chess victories. He also has an odd habit of embracing the unknown termination methods (think draws due to mysterious forces), with nearly 225 games ending in such enigmatic ways.
Recent Exploits
In a dazzling recent game against kashishmjain, Sebastian executed a masterful Kings Indian Defense, forcing an opponent time-out after complex positional play starting with 1.Nf3 and culminating in a queen check – showing he’s as formidable on the clock as he is on the board. His ability to convert pressure into wins is second to none.
Fun Facts
- Can win on time just as well as on checkmate – proving sometimes the clock is mightier than the sword.
- Maintains a delightful 54% win rate in bullet chess — chaos is his playground.
- Has systematically demolished opponents with usernames like "fransenflug" and "tiger_claudio", boasting a perfect 100% win rate.
Whether lightning-fast bullet duels or marathon blitz marathons, Sebastian Kostolansky's chess saga continues to thrill. Brace yourself when encountering selvas123 online – he might just outclass you while sipping coffee and grinning mysteriously.
Recent Performance Overview
Sebastian, congratulations on your recent progress! Your strength adjusted win rate of about 54.4% is a solid foundation to build upon, especially considering the consistent gains reflected by your positive rating trend of +115 over the last month and steady improvement over 3, 6, and 12 months.
This steady upward trajectory demonstrates your growing understanding of game dynamics and ability to convert that into practical results. Keep focusing on learning from each game to maintain this momentum.
Analysis of Your Recent Games
Looking at your latest wins and losses, some key points stand out:
- Opening choices: You have been experimenting with openings like the Indian Game and the Alekhine's Defense, which shows a versatile approach. Continue exploring these while also deepening your knowledge to gain an edge in the early stages.
- Attack and defense: You often engage actively, for example, pursuing aggressive moves involving bishops and knights early on. This has helped you achieve tactical victories and checkmates as in one of your games won by checkmate quickly. However, occasionally your opponent exploited gaps in defense, leading to losses on time or positional difficulties.
- Time management: Some games ended due to opponents losing on time. This indicates you maintain pressure and create complex positions that challenge their clock management. Try to also ensure your own time management stays sharp to avoid reciprocal time trouble.
Your games show a good balance between tactical awareness and strategic planning, but refining these aspects further will continue to improve your performance.
Areas to Focus On
- Opening study: Since you experiment with different openings, solidify understanding of plans and key tactics linked to your favorite openings. This will give you confidence and allow you to capitalize on early advantages.
- Positional play: Look for ways to improve your defensive structure to minimize vulnerabilities, especially around your king. In some games defensive coordination was tested early.
- Endgame technique: Keep practicing common endgame patterns as several of your wins were concluded by checkmate or resignation after pressure. Strong endgame skills help convert advantages consistently.
- Time control skills: Work on pacing your moves in daily games to avoid time pressure, ensuring you maintain strong play through to the finish.
Next Steps
- Review your recent winning games, noting patterns that led to success and aim to replicate those in similar positions.
- Analyze losses with a focus on how the opponent exploited weaknesses to prevent repeating mistakes.
- Use puzzles and tactical exercises related to your openings and typical middlegame themes you encounter.
- Consider setting small goals like improving rating by 50 points over two months while tracking progress.
Keep enjoying the game and maintaining a growth mindset. Chess improvement is a marathon, and your steady rating increase shows you are on the right path.
🆚 Opponent Insights
| Recent Opponents | ||
|---|---|---|
| Srihari L R | 2W / 0L / 0D | View |
| Suresh Harsh | 4W / 4L / 1D | View |
| Srihari L | 1W / 1L / 0D | View |
| Manish Anto Cristiano F | 0W / 1L / 1D | View |
| Koustav Chatterjee | 1W / 0L / 0D | View |
| Balaji Daggupati | 0W / 1L / 0D | View |
| Rahul Srivatshav P | 1W / 0L / 0D | View |
| karoliukasj | 1W / 0L / 0D | View |
| Most Played Opponents | ||
|---|---|---|
| blk2006 | 36W / 15L / 2D | View Games |
| bluebird_express | 25W / 15L / 5D | View Games |
| Alexander Rustemov | 5W / 25L / 5D | View Games |
| uultimaoportunidad | 16W / 16L / 2D | View Games |
| Alexander Kopylov | 4W / 19L / 5D | View Games |
Rating
| Year | Bullet | Blitz | Rapid | Daily |
|---|---|---|---|---|
| 2025 | 2864 | 2911 | 2600 | |
| 2024 | 2800 | 2750 | 2520 | |
| 2023 | 2803 | 2803 | 2513 | |
| 2022 | 2662 | |||
| 2021 | 2741 | 2727 | 2244 | |
| 2020 | 2461 | 2639 | 2253 | 1287 |
| 2019 | 2443 | 2600 | 2014 | |
| 2018 | 2302 | 2295 | 1905 | 1172 |
| 2017 | 1324 | 1759 | 1680 |
Stats by Year
| Year | White | Black | Moves |
|---|---|---|---|
| 2025 | 249W / 124L / 28D | 223W / 155L / 31D | 87.0 |
| 2024 | 88W / 34L / 4D | 75W / 36L / 12D | 85.6 |
| 2023 | 219W / 148L / 37D | 210W / 166L / 24D | 88.4 |
| 2022 | 102W / 137L / 20D | 98W / 130L / 39D | 85.5 |
| 2021 | 139W / 157L / 26D | 130W / 157L / 29D | 84.1 |
| 2020 | 60W / 63L / 14D | 68W / 78L / 8D | 80.6 |
| 2019 | 146W / 107L / 23D | 148W / 114L / 17D | 79.0 |
| 2018 | 206W / 162L / 19D | 205W / 154L / 17D | 75.8 |
| 2017 | 66W / 29L / 1D | 74W / 18L / 1D | 49.5 |
Openings: Most Played
| Blitz Opening | Games | Wins | Losses | Draws | Win Rate |
|---|---|---|---|---|---|
| Sicilian Defense: Alapin Variation, Sherzer Variation | 141 | 59 | 68 | 14 | 41.8% |
| Caro-Kann Defense | 136 | 66 | 57 | 13 | 48.5% |
| Sicilian Defense | 95 | 50 | 34 | 11 | 52.6% |
| Unknown | 82 | 51 | 28 | 3 | 62.2% |
| Sicilian Defense: Moscow Variation | 81 | 42 | 35 | 4 | 51.9% |
| Modern | 76 | 38 | 34 | 4 | 50.0% |
| Czech Defense | 71 | 27 | 41 | 3 | 38.0% |
| Sicilian Defense: Taimanov Variation, Bastrikov Variation, English Attack | 69 | 28 | 39 | 2 | 40.6% |
| Scandinavian Defense | 64 | 31 | 29 | 4 | 48.4% |
| Sicilian Defense: Closed, Anti-Sveshnikov Variation, Kharlov-Kramnik Line | 63 | 29 | 32 | 2 | 46.0% |
| Rapid Opening | Games | Wins | Losses | Draws | Win Rate |
|---|---|---|---|---|---|
| Sicilian Defense: Alapin Variation | 6 | 4 | 2 | 0 | 66.7% |
| English Opening: Anglo-Indian Defense | 5 | 3 | 2 | 0 | 60.0% |
| Sicilian Defense | 4 | 0 | 4 | 0 | 0.0% |
| Sicilian Defense: Taimanov Variation | 4 | 4 | 0 | 0 | 100.0% |
| Czech Defense | 4 | 4 | 0 | 0 | 100.0% |
| Sicilian Defense: Kan Variation, Gipslis Variation | 3 | 1 | 1 | 1 | 33.3% |
| Modern | 3 | 2 | 1 | 0 | 66.7% |
| Hungarian Opening: Wiedenhagen-Beta Gambit | 3 | 3 | 0 | 0 | 100.0% |
| QGD: 3.Nc3 Nf6 4.e3 | 3 | 3 | 0 | 0 | 100.0% |
| Sicilian Defense: Closed | 3 | 2 | 1 | 0 | 66.7% |
| Bullet Opening | Games | Wins | Losses | Draws | Win Rate |
|---|---|---|---|---|---|
| Amar Gambit | 74 | 39 | 32 | 3 | 52.7% |
| Caro-Kann Defense | 74 | 48 | 21 | 5 | 64.9% |
| Modern | 65 | 29 | 29 | 7 | 44.6% |
| Czech Defense | 62 | 26 | 32 | 4 | 41.9% |
| French Defense | 57 | 35 | 22 | 0 | 61.4% |
| Sicilian Defense: Alapin Variation, Sherzer Variation | 50 | 24 | 24 | 2 | 48.0% |
| Colle System: Rhamphorhynchus Variation | 47 | 25 | 17 | 5 | 53.2% |
| Hungarian Opening: Wiedenhagen-Beta Gambit | 47 | 26 | 18 | 3 | 55.3% |
| Nimzo-Larsen Attack | 35 | 18 | 16 | 1 | 51.4% |
| Scandinavian Defense | 35 | 14 | 18 | 3 | 40.0% |
| Daily Opening | Games | Wins | Losses | Draws | Win Rate |
|---|---|---|---|---|---|
| Amazon Attack: Siberian Attack | 1 | 1 | 0 | 0 | 100.0% |
| Alekhine Defense | 1 | 1 | 0 | 0 | 100.0% |
| Sicilian Defense: Closed, Anti-Sveshnikov Variation, Kharlov-Kramnik Line | 1 | 1 | 0 | 0 | 100.0% |
| Sicilian Defense: Alapin Variation | 1 | 1 | 0 | 0 | 100.0% |
| French Defense | 1 | 1 | 0 | 0 | 100.0% |
| Amar Gambit | 1 | 1 | 0 | 0 | 100.0% |
| French Defense: Exchange Variation | 1 | 0 | 1 | 0 | 0.0% |
| French Defense: Tarrasch Variation, Botvinnik Variation | 1 | 0 | 1 | 0 | 0.0% |
🔥 Streaks
| Streak | Longest | Current |
|---|---|---|
| Winning | 26 | 1 |
| Losing | 14 | 0 |