Avatar of Jonathan Westerberg

Jonathan Westerberg GM

Username: jonathanwesterberg

Location: Stockholm

Playing Since: 2008-01-27 (Active)

Wow Factor: ♟♟♟♟♟

Chess.com

Daily: 1448
17W / 8L / 0D
Rapid: 2625
395W / 85L / 48D
Blitz: 2773
1812W / 939L / 250D
Bullet: 2756
1789W / 947L / 205D

Jonathan Westerberg: The Grandmaster of Blitz and Bullet

Meet Jonathan Westerberg, a chess Grandmaster who doesn't just move pieces — they make them dance. With a FIDE title gleaming proudly next to their name, Jonathan has stormed the chess battleground with a style that's part tactical wizardry, part speed demon.

Starting from humble beginnings in 2013 with blitz ratings flirting with the 1300s, Jonathan catapulted to over 2800 in blitz by late 2023 — a meteoric rise fueled by sheer grit and probably a secret stash of caffeine. Bullet and rapid formats see similar fireworks, with peak ratings soaring into the 2700s and 2600s, respectively. If you've blinked, chances are Jonathan has already pulled a stunning queen sacrifice or checkmate on you.

Their game is a rollercoaster: an incredible comeback rate of almost 88%, showing that losing a piece is just a minor inconvenience before a glorious turnaround. Early resignations are rare (less than 1%), proving Jonathan battles down to the wire, squeezing every drop of drama out of each game.

Known for a heavy dose of endgames—over 82% frequency—Jonathan apparently loves the slow burn, slowly strangling opponents with a mix of patience and killer precision. White pieces bring about a nearly 66% win rate, but don't underestimate the black side; even there, Jonathan wrings out victories close to 60%.

If you want to catch them at their best, set your alarm for 8 AM; that’s when their brain’s firing on all cylinders. Also, a curious fact: the 8 AM hour boasts an 85% win rate, so maybe mornings are secretly Jonathan's army of pawns.

Speaking of openings, Jonathan keeps things intriguingly mysterious. The "Top Secret" opening category dominates blitz and bullet with over 60% wins, proving that sometimes the best defense is not letting anyone know what’s coming. But a special shout-out to the Queen's Pawn Opening - Chigorin Variation, a playground where Jonathan’s tactical artistry shines brightest, culminating in dazzling victories, including a recent checkmate extravaganza in 2025.

With thousands of games under the belt and a record that mixes epic wins (145 blitz wins in a recent 254-game span) and the occasional humbling loss (tilt factor 7—because even Grandmasters have off days), Jonathan Westerberg is a thrilling player to watch, play against, or just root for.

Fun fact: Despite being a Grandmaster, Jonathan seems to have mastered the art of winning by timeout just as often as by checkmate. Beat the clock, beat the opponent!

Keep an eye on this legend; the chessboard is their stage, and every move is a performance.


Coach's Avatar

Recent Games Review

Jonathan, looking over your recent bullet games, there are positive aspects and areas to focus on for improvement.

  • Opening Choices: You consistently utilize a variety of openings including the Scandinavian Defense, Caro-Kann, and Closed Sicilian, with strong win rates, especially in gambit and Czech Defense lines. This shows a good repertoire breadth that suits your aggressive style.
  • Middle Game Play: Some losses, particularly in complex positions, suggest opportunities to enhance calculation under time pressure. There were moments where better defensive moves or consolidations might have prevented material loss or quick declines.
  • Endgame Technique: The recent losses on time and positioning indicate improving endgame knowledge and time management remains key, especially in rapid scenarios like bullet where every second counts.

Strengths to Build On

Your play is marked by:

  • Effective use of aggressive openings with strong win percentages, indicating good preparation and understanding of these lines.
  • Ability to capitalize on opponent weaknesses quickly, which is vital in bullet games where initiative often decides outcomes.
  • Maintaining an upward rating trend with steady improvement over the months, reflecting learning and adaptation.

Key Improvement Areas

To continue your climb, consider focusing on:

  • Time Management: Practice managing your time better, especially in critical moments to avoid losses on time and rushed mistakes.
  • Calculation and Tactical Awareness: Drill tactical motifs and improve calculation depth to reduce blunders in complex positions.
  • Endgame Fundamentals: Strengthen basic endgame knowledge to confidently convert advantages and hold difficult draws.
  • Opening Flexibility: While your favored openings are solid, working on adapting when facing unexpected responses can provide a strategic edge.

Next Steps for Training

Based on your recent games and performance data, try integrating the following into your practice:

  • Regular tactics sessions focusing on bullet-style rapid calculation.
  • Timed endgame drills to build speed and precision under pressure.
  • Review your bullet games focusing on moments of tactical oversight and missed defensive resources.
  • Experiment with mix-and-match openings occasionally to improve adaptability and surprise factor against opponents.

Overall Progress

Your rating trend is very positive, with quick gains in recent months and a strength adjusted win rate above 50%. This reflects excellent potential and consistent improvement. Keep building on your strengths while addressing key tactical and time management aspects to push your bullet performance even higher.



🆚 Opponent Insights

Recent Opponents
donottouchmyking79 1W / 0L / 0D
Mikey Groves 0W / 1L / 0D
Carlos Alberto Martinez Molina 1W / 0L / 0D
pyrics 1W / 0L / 0D
loopliyixin 0W / 1L / 0D
bejobledi 1W / 1L / 0D
tule5ai5 1W / 0L / 0D
ronin_kagami 1W / 0L / 0D
albabcreators 2W / 0L / 0D
panter91 0W / 1L / 0D
Most Played Opponents
Emil Jonsson 253W / 32L / 11D
KingMarriland 25W / 5L / 4D
PracticeMakesOK 15W / 15L / 3D
Carlos Alarcia 23W / 7L / 0D
stellarchess 15W / 12L / 3D

Rating

Year Bullet Blitz Rapid Daily
2025 2665 2773 2625 1448
2024 2522 2716 2245
2023 2509 2722 2247
2021 2503
2020 2526
2019 2275 2645 2136
2018 2296 2596
2017 2395
2016 2342 1283
2015 2282 2418
2014 2019 2256 1391
2013 2019 2269 1459
2009 1569
2008 1558
Rating by Year2008200920132014201520162017201820192020202120232024202527731283YearRatingBulletBlitzRapidDaily

Stats by Year

Year White Black Moves
2025 1210W / 535L / 138D 1143W / 617L / 152D 87.4
2024 115W / 52L / 22D 101W / 64L / 27D 90.0
2023 126W / 45L / 21D 101W / 67L / 27D 85.0
2021 1W / 0L / 0D 0W / 1L / 0D 101.0
2020 6W / 7L / 0D 5W / 7L / 1D 84.0
2019 191W / 100L / 26D 163W / 136L / 19D 88.8
2018 113W / 53L / 9D 101W / 64L / 12D 89.4
2017 6W / 0L / 0D 6W / 2L / 0D 74.6
2016 49W / 6L / 0D 43W / 8L / 6D 69.6
2015 72W / 26L / 4D 69W / 27L / 8D 83.1
2014 80W / 45L / 5D 81W / 38L / 7D 76.6
2013 69W / 22L / 5D 72W / 24L / 2D 76.5
2009 2W / 0L / 0D 0W / 3L / 0D 43.8
2008 5W / 2L / 0D 7W / 2L / 0D 47.2

Openings: Most Played

Bullet Opening Games Wins Losses Draws Win Rate
Caro-Kann Defense 184 114 56 14 62.0%
Sicilian Defense: Closed 180 120 51 9 66.7%
Scandinavian Defense 159 105 41 13 66.0%
Amar Gambit 103 70 24 9 68.0%
Modern 103 51 43 9 49.5%
Alekhine Defense 89 53 25 11 59.5%
Colle System: Rhamphorhynchus Variation 82 51 27 4 62.2%
Czech Defense 76 52 15 9 68.4%
Australian Defense 73 41 26 6 56.2%
Nimzo-Larsen Attack 71 37 31 3 52.1%
Blitz Opening Games Wins Losses Draws Win Rate
Sicilian Defense: Closed 156 98 45 13 62.8%
Sicilian Defense: Alapin Variation 114 57 47 10 50.0%
Caro-Kann Defense 102 64 33 5 62.8%
Four Knights Game 88 51 24 13 58.0%
Sicilian Defense: Taimanov Variation, American Attack 84 45 26 13 53.6%
Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation 81 52 19 10 64.2%
English Opening: Agincourt Defense 71 37 28 6 52.1%
Modern 58 38 17 3 65.5%
Sicilian Defense 52 30 20 2 57.7%
QGA: 3.e3 c5 50 28 16 6 56.0%

🔥 Streaks

Streak Longest Current
Winning 22 0
Losing 7 2