Prepare against Jelmer Jens
IM · NLD · World #2,258 classical · FIDE ID 1007394
Our database contains 720 games by Jelmer Jens, covering Apr 2003 to Aug 2026. Below you'll find Jelmer Jens's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Jelmer Jens before a game. You can open the same data in the free interactive preparation workstation, which builds a move-by-move opening tree from every game.
Ratings
| Time control | Current | Peak | Peak date |
|---|---|---|---|
| Classical | 2,370 | 2,437 | Sep 2018 |
| Blitz | 2,326 | 2,347 | Jul 2025 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 720 | 284 | 240 | 196 | 39.4% |
| As White | 350 | 154 | 121 | 75 | 44.0% |
| As Black | 370 | 130 | 119 | 121 | 35.1% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Jelmer Jens's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Jelmer Jens's side.
First moves as White (349 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| e4 | 339 | 97.1% | 60.8% |
| d4 | 5 | 1.4% | 80.0% |
| Nf3 | 5 | 1.4% | 70.0% |
Main lines as White
- 1.e4 — 97% of White games, 60.8% score
- …c5 (40% of these games) — Jens usually continues Nf3 (60.1% score)
- …e5 (22% of these games) — Jens usually continues Nf3 (63.1% score)
- …e6 (15% of these games) — Jens usually continues d4 (66.3% score)
- 1.d4 — 1% of White games, 80.0% score
- …Nf6 (80% of these games) — Jens usually continues c4 (75.0% score)
- …g6 (20% of these games) — Jens usually continues c4 (100.0% score)
As Black against 1.e4 (192 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| c5 | 127 | 66.1% | 51.2% |
| e5 | 42 | 21.9% | 58.3% |
| e6 | 17 | 8.9% | 67.6% |
| c6 | 4 | 2.1% | 25.0% |
| d6 | 1 | 0.5% | 50.0% |
| d5 | 1 | 0.5% | 50.0% |
As Black against 1.d4 (102 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| Nf6 | 78 | 76.5% | 50.0% |
| f5 | 20 | 19.6% | 47.5% |
| e6 | 3 | 2.9% | 50.0% |
| d5 | 1 | 1.0% | 100.0% |
Jelmer Jens's chess games
All 720 games by Jelmer Jens in the Chess.ceo database (Apr 2003 - Aug 2026) are free to browse, search and replay: filter by opening, opponent, event or date on the player page, or step through any game on the analysis board. Record: 284 wins, 240 draws, 196 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| B42 | Sicilian | 53 | 25/11/17 | 47.2% |
| C03 | French: Tarrasch Variation | 36 | 17/14/5 | 47.2% |
| B80 | Sicilian: Najdorf | 33 | 16/8/9 | 48.5% |
| B31 | Sicilian: Rossolimo | 21 | 9/8/4 | 42.9% |
| C92 | Ruy Lopez: Closed | 19 | 8/8/3 | 42.1% |
| C78 | Ruy Lopez: Morphy Defense | 13 | 5/4/4 | 38.5% |
| A42 | Modern Defense | 13 | 5/8/0 | 38.5% |
| B11 | Caro-Kann: Two Knights Variation | 12 | 5/5/2 | 41.7% |
| C41 | Philidor | 11 | 5/5/1 | 45.5% |
| B70 | Sicilian: Dragon | 11 | 7/1/3 | 63.6% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| B50 | Sicilian | 45 | 17/9/19 | 37.8% |
| B82 | Sicilian: Najdorf | 44 | 14/16/14 | 31.8% |
| A80 | Dutch Defense | 29 | 7/9/13 | 24.1% |
| A16 | English Opening | 27 | 11/10/6 | 40.7% |
| D91 | Grünfeld Defense | 21 | 6/8/7 | 28.6% |
| B22 | Sicilian: Alapin | 16 | 7/5/4 | 43.8% |
| C95 | Ruy Lopez: Closed | 13 | 6/5/2 | 46.2% |
| B23 | Sicilian: Closed | 12 | 4/4/4 | 33.3% |
| D72 | Indian Defense | 11 | 5/2/4 | 45.5% |
| E97 | King's Indian Defense: Orthodox Variation | 9 | 1/1/7 | 11.1% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Oct 2015 | Jan Smeets | 2,617 | chT-NED 1516 | B42 |
| May 2011 | Pavel V. Tregubov | 2,607 | FRA-chT Top 12 | D72 |
| May 2004 | Friso Nijboer | 2,586 | Bussum Open | B42 |
| Jul 2002 | Semen I. Dvoirys | 2,574 | Dieren Open | B97 |
| Mar 2005 | Stefan Gottschling | 2,545 | chT-BEL 0405 | B42 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| Dieren Open | 2003 | 36 | 20.5 | 2,368 |
| ch-NED U20 | 2002 | 27 | 14.5 | 2,327 |
| Hoogeveen Essent Open | 2005 | 27 | 15 | 2,404 |
| ch-NED U16 | 1998 | 18 | 11.5 | 2,301 |
| Lost Boys Open | 2002 | 17 | 9 | 2,351 |
| ch-NED U12 | 1994 | 13 | 10.5 | – |
| chT-BEL 0809 | 2009 | 10 | 7 | 2,424 |
| 22nd Arco Open | 2000 | 9 | 5.5 | 2,304 |
Interactive opening tree from all 720 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Jelmer Jens's chess games?
720 games by Jelmer Jens, from Apr 2003 to Aug 2026, are free to browse and replay move by move — no signup needed. The preparation view groups them into an opening tree showing every line Jelmer Jens has played.
What does Jelmer Jens play on the first move as White?
Across 349 games with White in our database, Jelmer Jens opens with 1.e4 (97% of games), 1.d4 (1% of games), 1.Nf3 (1% of games). Against 1.e4 as Black, Jelmer Jens answers 1...c5 (66% of games), 1...e5 (22% of games), 1...e6 (9% of games). Against 1.d4: 1...Nf6 (76% of games), 1...f5 (20% of games), 1...e6 (3% of games).
What openings does Jelmer Jens play as White?
As White, Jelmer Jens's most-played openings in our database are: Sicilian (53 games, 47.2% win rate); French: Tarrasch Variation (36 games, 47.2% win rate); Sicilian: Najdorf (33 games, 48.5% win rate). The full breakdown of 350 games with White is in the table above.
What openings does Jelmer Jens play as Black?
As Black, Jelmer Jens most often plays: Sicilian (45 games, 37.8% win rate); Sicilian: Najdorf (44 games, 31.8% win rate); Dutch Defense (29 games, 24.1% win rate). See the table above for the top ten Black openings across 370 games.
What is Jelmer Jens's FIDE rating?
Jelmer Jens is currently rated 2,370 in classical chess and 2,326 in blitz. Peak classical rating: 2,437 (Sep 2018).
How many games has Jelmer Jens played?
Our database contains 720 games by Jelmer Jens, covering Apr 2003 to Aug 2026. Overall record: 284 wins, 240 draws, 196 losses (39.4% win rate).
How do I prepare against Jelmer Jens?
720 games by Jelmer Jens reveal their opening repertoire, most-played lines, and the variations where they score worst — the raw material for targeted preparation. The interactive opening tree lets you walk every line to any depth.