GMHarmen Jonkman
NED · FIDE ID 1002708 · 32 tournament games since 2023
Standard
2279
#160 in NED (active)
Rapid
2351
#44 in NED (active)
Blitz
2368
#51 in NED (active)
Score
33%
9 W · 3 D · 20 L
Opp. avg
2430
Last 32 games
Last game
2026-04-16
23rd Bangkok Chess Club Open 2026 | Classical
Prep summary
- As White: 1.d4 in 59% of games (scores 35%), otherwise 1.e4 (41%).
- Against 1.e4: 1...e5 in 7 of 9 games (King's Pawn Game), scoring 0%.
- Against 1.d4: 1...d5 in 2 of 3 games (Queen's Pawn Game), scoring 0%.
- Comfort zone: Queen's Pawn Game: London System as White, 83% in 3 games.
- By opponent strength: 10% against higher-rated players, 93% against lower-rated.
- By colour: 44% with White, 20% with Black.
Based on 32 over-the-board games (1 classical). 17 with White (44%), 15 with Black (20%).
Openings as White
First move
| 1.d4 | 10 | 35% |
| 1.e4 | 7 | 57% |
Most played
| Opening | Games | Score |
|---|---|---|
| Queen's Pawn Game: London System | 3 | 83% |
| Sicilian Defense: Old Sicilian | 2 | 50% |
| Caro-Kann Defense: Exchange Variation | 1 | 100% |
| Sicilian Defense: Delayed Alapin Variation, with d6 | 1 | 100% |
| Pirc Defense | 1 | 0% |
Openings as Black
Against 1.e4 (9 games)
| 1...e5 King's Pawn Game | 7 | 0% |
| 1...e6 French Defense | 2 | 50% |
Against 1.d4 (3 games)
| 1...d5 Queen's Pawn Game | 2 | 0% |
| 1...Nf6 Indian Defense | 1 | 100% |
Most played
| Opening | Games | Score |
|---|---|---|
| Queen's Gambit Accepted: Classical Defense, Main Line | 2 | 0% |
| Ruy Lopez: Berlin Defense, l'Hermet Variation, Berlin Wall Defense | 2 | 0% |
| French Defense: Exchange Variation | 2 | 50% |
| Center Game: Berger Variation | 1 | 0% |
| Ruy Lopez: Berlin Defense, Rio Gambit Accepted | 1 | 0% |
Recent games
| Date | Opponent and event | Result |
|---|---|---|
| 2026-04-16 | Paulo Bersamina (2434) 23rd Bangkok Chess Club Open 2026 | Classical · classical | L |
| 2024-10-25 | Hans-Henrik Grand (2134) European Chess Club Cup | Open Boards 67-162 | W |
| 2024-10-24 | Drazen Dragicevic (2316) European Chess Club Cup | Open Boards 67-162 | L |
| 2024-10-23 | Zsolt Rigo (2389) European Chess Club Cup | Open Boards 67-162 | L |
| 2024-10-22 | Anton Zlatkov (2323) European Chess Club Cup | Open Boards 67-162 | W |
| 2024-10-21 | Arend Van de Lagemaat (2022) European Chess Club Cup | Open Boards 67-162 | W |
| 2024-10-20 | M. Amin Tabatabaei (2702) European Chess Club Cup | Open | L |
| 2023-06-12 | Sergei Iskusnyh (2440) Aimchess Rapid Play-In | L |
| 2023-06-12 | Daniel Alsina Leal (2518) Aimchess Rapid Play-In | W |
| 2023-06-12 | Ruben Gideon Koellner (2429) Aimchess Rapid Play-In | L |
Data: FIDE rating list (October 2026 list; national ranks count active players) and tournament games broadcast on Lichess since 2020 (open data, CC0). Results are matched to FIDE players by name or FIDE ID and may be incomplete. This page shows public chess results only. Is this you and you want the page removed? Email chessmoose1@gmail.com and we remove it.