Avatar of Harmen Jonkman

Harmen Jonkman GM

Username: CheckBits

Playing Since: 2022-12-23 (Inactive)

Wow Factor: ♟

Chess.com

Rapid: 2173
6W / 16L / 1D
Blitz: 2415
100W / 110L / 17D
Bullet: 2331
588W / 317L / 27D

About Harmen Jonkman

Harmen Jonkman is a Grandmaster, a rare species in the chess world, known for his fearless and strategic gameplay. With a love for the Bullet time control, Harmen dazzles opponents with quick thinking and even quicker moves, proving that speed and precision can go hand in hand on the battlefield of 64 squares.

Playing Style and Strengths

Jonkman's style is a blend of tactical awareness and resilience:

  • Renowned for a strong comeback rate of nearly 80%, showing he never gives up easily.
  • Excellent psychological fortitude with a low tilt factor of 10, meaning he keeps his cool even in tough matches.
  • Prefers to keep games dynamic with an average of over 70 moves for wins, indicating deep and prolonged battles.
  • His win rate after losing a piece stands at 55%, a testament to his resourcefulness and fighting spirit.

Favorite Openings

Harmen demonstrates versatility across multiple openings, with impressive win rates especially in Blitz chess:

  • Blitz: Indian Defence, Knights Variation (86% win rate), Italian Game: Giuoco Pianissimo (67%), and Benoni structures often bedeviling opponents.
  • Bullet: Hungarian Opening and Benko Opening showcase his attacking flair, holding win rates over 69% and 77% respectively.
  • Rapid: Though played less frequently, Harmen scores well with the Indian Defence, Knights Variation and Neo-King’s Indian London System.

Career Highlights & Statistics

  • Peak Blitz rating of 2539 in January 2023.
  • Reached a Bullet peak rating of 2378 in mid-2024.
  • Rapid peak rating of 2261 early 2023.
  • Impressive win-to-loss records in Bullet (588 wins to 316 losses), with strong performances also in Blitz and Rapid formats.
  • Longest winning streak recorded at 23 games — a true demonstration of dominance!

Fun Facts

  • Harmen’s best time for play is around 11 AM, perhaps fueled by a strong coffee and a sharp mind.
  • He has an “early resignation rate” under 1%, meaning he rarely throws in the towel without a fight.
  • Favorites include tricky defenses and quiet maneuvering openings — perfect for keeping opponents guessing.
  • Harmen often surprises with unusual first moves such as 1.g3, showing his creative approach to the game.

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Coach Chesswick

Coach's Advice

It's been a while since you played. Play a few more games so we have more positions and decisions to review — then I can provide you with clearer, more actionable advice.



🆚 Opponent Insights

Most Played Opponents
Slavenko Glavan 6W / 8L / 0D View Games
zzzeeet 7W / 5L / 0D View Games
Liliam Barbara Blanco Garcia 7W / 3L / 1D View Games
Mehmet Kara 2W / 7L / 2D View Games
warehamus 7W / 2L / 0D View Games

Rating

Year Bullet Blitz Rapid Daily
2024 2331 1508 2173
2023 2221 2405 2166
2022 2141
Rating by Year20222023202424051508YearRatingBulletBlitzRapid

Stats by Year

Year White Black Moves
2024 152W / 134L / 13D 151W / 138L / 8D 76.5
2023 172W / 79L / 12D 174W / 83L / 11D 72.1
2022 22W / 5L / 1D 24W / 3L / 0D 65.8

Openings: Most Played

Blitz Opening Games Wins Losses Draws Win Rate
London System: Poisoned Pawn Variation 21 7 11 3 33.3%
Döry Defense 16 10 6 0 62.5%
Sicilian Defense: Alapin Variation 13 6 6 1 46.1%
Blackburne Shilling Gambit 11 6 4 1 54.5%
French Defense: Advance Variation 9 3 4 2 33.3%
Amazon Attack: Siberian Attack 7 4 2 1 57.1%
Amazon Attack 5 1 4 0 20.0%
Caro-Kann Defense 5 1 4 0 20.0%
Modern 5 4 1 0 80.0%
QGA: Classical, 6...a6 7.a3 5 1 3 1 20.0%
Bullet Opening Games Wins Losses Draws Win Rate
Amar Gambit 124 78 40 6 62.9%
French Defense 49 36 12 1 73.5%
Colle System: Rhamphorhynchus Variation 41 28 11 2 68.3%
London System: Poisoned Pawn Variation 32 18 14 0 56.2%
French Defense: Exchange Variation 30 22 8 0 73.3%
Hungarian Opening: Wiedenhagen-Beta Gambit 30 17 10 3 56.7%
Döry Defense 27 18 8 1 66.7%
Barnes Defense 27 18 9 0 66.7%
Sicilian Defense: Alapin Variation 24 13 10 1 54.2%
Australian Defense 20 12 8 0 60.0%
Rapid Opening Games Wins Losses Draws Win Rate
Ruy Lopez: Berlin Defense, Berlin Wall 3 0 3 0 0.0%
QGA: Classical, 6...a6 7.a3 2 0 2 0 0.0%
Sicilian Defense: Alapin Variation 2 1 1 0 50.0%
East Indian Defense 2 1 1 0 50.0%
Bogo-Indian Defense 2 0 2 0 0.0%
London System: Poisoned Pawn Variation 2 0 2 0 0.0%
Australian Defense 1 1 0 0 100.0%
Czech Defense 1 0 1 0 0.0%
Amazon Attack: Siberian Attack 1 1 0 0 100.0%
Barnes Defense 1 0 1 0 0.0%

🔥 Streaks

Streak Longest Current
Winning 23 1
Losing 10 0
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