Avatar of Jaroslav Sobek

Jaroslav Sobek FM

Username: JaroslavSobek

Location: Karviná

Playing Since: 2024-11-02 (Active)

Wow Factor: ♟♟♟♟

Chess.com

Blitz: 2100
304W / 721L / 76D

Biography

JaroslavSobek is a titled chess player who has carved out a reputation as a sharp Blitz specialist. Earned the FIDE Master title from FIDE, they bring a calm, endgame-friendly approach to fast time controls and a willingness to experiment with a wide opening repertoire. In online blitz circles, JaroslavSobek is known for grinding out long, strategic battles and delivering tenacious defenses when the clock starts to bite. Their style blends practical decision making with a flair for tactical motifs when the moment calls for it.

Career highlights

In recent years, JaroslavSobek has been a persistent presence in blitz events, peaking with a Blitz rating of 2335 in November 2024. They maintained a high-volume schedule through 2024 and into 2025, accumulating hundreds of games and testing themselves against a wide field of opponents. The journey features notable rallies and stamina in long sessions, underscored by a strong endgame awareness.

  • Peak Blitz rating: 2335 (2024-11-05)
  • Longest winning streak: 5 games
  • Longest losing streak: 14 games
  • Preferred time control: Blitz

Their persistence and growth reflect the mindset of a dedicated competitor who enjoys the challenge of rapid-fire decisions and complex endings.

Blitz Rating2024202521722114YearBlitz Rating

Opening repertoire and playing style

JaroslavSobek maintains a diverse blitz repertoire with a tilt toward sharp, dynamic lines. Selected openings and their Blitz performance include:

  • Sicilian Defense: Najdorf Variation — 36 games, 12 wins, 23 losses, 1 draw; WinRate 33.33%
  • Sicilian Defense: O’Kelly Variation — 95 games, 31 wins, 54 losses, 10 draws; WinRate 32.63%
  • King's Indian Defense: Makogonov Variation — 39 games, 10 wins, 27 losses, 2 draws; WinRate 25.64%
  • QGD: 3.Nc3 Bb4 — 18 games, 3 wins, 14 losses, 1 draw; WinRate 16.67%

Beyond the openings, their approach favors long, rich middlegame battles and resilient endgames, a testament to their endgame frequency and tactical awareness.

Competitive spirit and field presence

JaroslavSobek’s games reveal a pragmatic, endurance-focused fighter who thrives in the grind of blitz. The journey includes a notable comeback capacity and a robust endgame temperament, backed by a tactical sense that surfaces in tight moments.

  • Comeback rate after losing a piece: 76.1%
  • Endgame frequency: 80.76%
  • Notable opponent encounters: faced a diverse field, including frequent opponents such as mirchi_26, kyiv-volvo, navyblue1, fmalexhdez, and mise2020

Coach's Avatar

What’s going well in your blitz play

You demonstrate a willingness to fight in complex, tactical positions and keep pressure on the opponent. In your wins, you managed to convert attacks into decisive endgame chances, showing good resourcefulness and practical sense under time pressure. You also appear comfortable navigating sharp middlegames where piece activity and king safety become the deciding factors.

Key areas to sharpen

  • Time management in blitz: avoid getting into heavy calculation or risky lines when the clock is short. Develop a routine to allocate a sensible portion of your time to the opening and middlegame, leaving buffer for critical moments.
  • Endgame technique: several losses suggest moments where converting or defending rook and minor piece endings could be improved. Focus on common rook endings and king activity, and practice simplified positions to reinforce correct plans.
  • Opening planning: while you are comfortable in dynamic lines, tighten your repertoire so you know typical middlegame plans and typical pawn structures. This helps you choose safer paths when under time pressure and reduces unnecessary risk.
  • Calculation discipline: in blitz, it’s easy to overshoot or miss forcing lines. Work on scanning for immediate threats and tactical motifs (forks, pins, skewers) to avoid losing material from simple oversights.
  • Pattern recognition and traps: strengthen awareness of common blitz traps in the openings you favor, so you don’t fall into naive setups against strong opponents.

Action plan for the next two weeks

  • Time management drills: practice a fixed time budget per game (for example, 20 seconds per move in the first 10 moves, then adjust) and use the increment to stabilize late-game play.
  • Daily tactics: dedicate 15–20 minutes to tactical puzzles that emphasize calculation under time pressure and recognizing typical motifs.
  • Endgame practice: study rook endings and king activity in common blitz structures; play short endgame drills or set up practice positions to reinforce decision-making.
  • Opening consolidation: select 2–3 lines to master for your main replies (one for 1.e4, one for 1.d4, and one flexible option). Build a simple plan for each and annotate typical middlegame ideas.
  • Post-game analysis: after each blitz session, pick 1 mistake or dubious decision per game and write a short note on what to do differently next time.

Opening focus and resources

Your openings data show experience in several dynamic systems. Consider strengthening a compact, repeatable set of lines to reduce under-time risk and improve consistency. You can lean on a few well-understood plans in each family of openings:

  • Sicilian Defense: O’Kelly Variation — focus on the typical pawn breaks and piece placements that keep kings safe and give you counterplay. Sicilian Defense: O’Kelly Variation
  • Sicilian Defense: Najdorf Variation — study common middlegame ideas and common endgames that arise from this line. Sicilian Defense: Najdorf Variation
  • Catalan Opening — emphasize solid development and the long-term pressure on the queen’s bishop diagonal. Catalan Opening
  • King’s Indian Defense: Makogonov Variation — work on typical pawn structures and how to convert space advantage into action. King’s Indian Defense: Makogonov Variation
  • QGD variants (3.Nc3 Bb4) — focus on how to neutralize early pressure and reach safe middlegames. QGD: 3.Nc3 Bb4

Feel free to explore these placeholders for quick reference: Jaroslav Sobek and Opening names as you build your study notes.

Concrete drills to start this week

  • Two short opening-repertoire drills per day: pick one line from your 1.e4 and one from 1.d4 responses and map out a simple middlegame plan for each.
  • Endgame focus: practice 2 rook endings from common blitz positions and record the key idea you used to activate the rook and king.
  • Post-game review ritual: after each blitz session, annotate one moment where a slower, safer move would have yielded a better result.


🆚 Opponent Insights

Recent Opponents
Luis Fernández Siles 1W / 1L / 0D
ash15k 0W / 1L / 0D
blankaejs 0W / 1L / 0D
Ian Ocampos 0W / 3L / 0D
germansanch 0W / 1L / 0D
ingoscarardila 0W / 1L / 0D
jan2404 1W / 1L / 0D
Jake Darmanin 0W / 2L / 0D
naaats888 1W / 1L / 0D
zampronha1971 0W / 2L / 0D
Most Played Opponents
Swara Lakshmi Nair 3W / 4L / 0D
Alexander Hernandez Jimenez 2W / 1L / 2D
Guadalupe Montano Vicente 1W / 4L / 0D
Marcel Winkels 3W / 2L / 0D
kyiv-volvo 0W / 5L / 0D

Rating

Year Bullet Blitz Rapid Daily
2025 2079
2024 2114
Rating by Year2024202521142079YearRatingBlitz

Stats by Year

Year White Black Moves
2025 99W / 266L / 25D 108W / 282L / 23D 73.8
2024 49W / 77L / 13D 47W / 90L / 14D 74.4

Openings: Most Played

Blitz Opening Games Wins Losses Draws Win Rate
Sicilian Defense: O'Kelly Variation 123 40 71 12 32.5%
Catalan Opening 93 23 61 9 24.7%
King's Indian Defense: Makogonov Variation 43 12 29 2 27.9%
Sicilian Defense: Najdorf Variation 36 12 23 1 33.3%
Australian Defense 35 12 22 1 34.3%
Sicilian Defense: Alapin Variation 32 9 21 2 28.1%
Sicilian Defense: Closed 30 7 20 3 23.3%
Amazon Attack 24 5 16 3 20.8%
QGD: 3.Nc3 Bb4 23 5 17 1 21.7%
Gruenfeld: Gruenfeld Gambit, 6.Qb3 20 6 14 0 30.0%

🔥 Streaks

Streak Longest Current
Winning 7 0
Losing 14 1