Prepare against Niels Ondersteijn
IM · NLD · World #2,315 classical · FIDE ID 1011162
Our database contains 454 games by Niels Ondersteijn, covering Apr 2003 to Aug 2026. Below you'll find Niels Ondersteijn's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Niels Ondersteijn 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 | 2,367 | 2,415 | Oct 2015 |
| Rapid | 2,392 | 2,401 | Mar 2025 |
| Blitz | 2,440 | 2,442 | Feb 2023 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 454 | 183 | 118 | 153 | 40.3% |
| As White | 224 | 99 | 62 | 63 | 44.2% |
| As Black | 230 | 84 | 56 | 90 | 36.5% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Niels Ondersteijn's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Niels Ondersteijn's side.
First moves as White (224 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| e4 | 102 | 45.5% | 53.9% |
| d4 | 48 | 21.4% | 57.3% |
| c4 | 46 | 20.5% | 69.6% |
| Nc3 | 15 | 6.7% | 70.0% |
| b3 | 7 | 3.1% | 35.7% |
| Nf3 | 3 | 1.3% | 33.3% |
Main lines as White
- 1.e4 — 46% of White games, 53.9% score
- …c5 (44% of these games) — Ondersteijn usually continues Nc3 (50.0% score)
- …e5 (25% of these games) — Ondersteijn usually continues Nf3 (56.5% score)
- …e6 (15% of these games) — Ondersteijn usually continues d4 (46.2% score)
- 1.d4 — 21% of White games, 57.3% score
- …Nf6 (65% of these games) — Ondersteijn usually continues c4 (59.7% score)
- …d5 (23% of these games) — Ondersteijn usually continues c4 (45.5% score)
- …d6 (4% of these games) — Ondersteijn usually continues c4 (100.0% score)
As Black against 1.e4 (123 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| c5 | 57 | 46.3% | 54.4% |
| d6 | 33 | 26.8% | 40.9% |
| e5 | 25 | 20.3% | 42.0% |
| Nf6 | 5 | 4.1% | 40.0% |
| g6 | 2 | 1.6% | 25.0% |
| c6 | 1 | 0.8% | 0.0% |
As Black against 1.d4 (73 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| Nf6 | 57 | 78.1% | 52.6% |
| d6 | 11 | 15.1% | 54.5% |
| f5 | 3 | 4.1% | 66.7% |
| g6 | 1 | 1.4% | 0.0% |
Niels Ondersteijn's chess games
All 454 games by Niels Ondersteijn 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: 183 wins, 118 draws, 153 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| B23 | Sicilian: Closed | 37 | 12/13/12 | 32.4% |
| A13 | English Opening | 23 | 15/1/7 | 65.2% |
| A00 | Dunst Opening | 13 | 8/2/3 | 61.5% |
| A20 | English Opening: Reverse Sicilian | 10 | 5/3/2 | 50.0% |
| E46 | Nimzo-Indian: Rubinstein System | 10 | 3/5/2 | 30.0% |
| D45 | Slav Defense | 9 | 3/3/3 | 33.3% |
| A01 | Nimzovich-Larsen attack | 7 | 1/3/3 | 14.3% |
| A36 | English Opening: Symmetrical | 6 | 4/1/1 | 66.7% |
| C18 | French: Winawer Variation | 6 | 3/1/2 | 50.0% |
| C77 | Ruy Lopez: Morphy Defense | 6 | 3/2/1 | 50.0% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| B07 | Pirc Defense | 30 | 7/9/14 | 23.3% |
| B36 | Sicilian: Accelerated Dragon | 27 | 10/6/11 | 37.0% |
| D85 | Grünfeld Defense | 26 | 10/9/7 | 38.5% |
| C41 | Philidor | 24 | 9/3/12 | 37.5% |
| D85 | Indian Defense | 14 | 4/5/5 | 28.6% |
| B27 | Sicilian: Hyperaccelerated Dragon | 14 | 5/2/7 | 35.7% |
| B36 | Modern Defense | 12 | 3/3/6 | 25.0% |
| A39 | English Opening | 8 | 1/3/4 | 12.5% |
| A04 | Sicilian | 6 | 3/2/1 | 50.0% |
| A37 | English Opening: Symmetrical | 6 | 3/2/1 | 50.0% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Apr 2015 | Leonid Milov | 2,465 | 19th Neckar Open A | A56 |
| Apr 2025 | Dragos Ceres | 2,453 | grenke Chess Open | A20 |
| Oct 2024 | Mikhail Bryakin | 2,438 | 39th ECC Open | E20 |
| Apr 2015 | Manuel Bosboom | 2,424 | chT-NED 1415 | D91 |
| May 2009 | Frank Kroeze | 2,424 | chT-NED 0809 | B28 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| Hengelo U20 Open | 2003 | 27 | 17 | 2,244 |
| Hengelo U14 Open | 1998 | 16 | 9 | – |
| Bruges Masters Open | 2023 | 13 | 8 | 2,262 |
| Karlsruhe Grenke Open | 2019 | 12 | 5 | 2,397 |
| Rotterdam Blitz Final AB | 2024 | 11 | 6.5 | 2,394 |
| NED U16 Open | 1999 | 9 | 5.5 | – |
| chT-NED 2223 | 2023 | 9 | 6.5 | 2,429 |
| ch-NED U16 Open | 2000 | 9 | 6 | – |
Interactive opening tree from all 454 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Niels Ondersteijn's chess games?
454 games by Niels Ondersteijn, 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 Niels Ondersteijn has played.
What does Niels Ondersteijn play on the first move as White?
Across 224 games with White in our database, Niels Ondersteijn opens with 1.e4 (46% of games), 1.d4 (21% of games), 1.c4 (21% of games). Against 1.e4 as Black, Niels Ondersteijn answers 1...c5 (46% of games), 1...d6 (27% of games), 1...e5 (20% of games). Against 1.d4: 1...Nf6 (78% of games), 1...d6 (15% of games), 1...f5 (4% of games).
What openings does Niels Ondersteijn play as White?
As White, Niels Ondersteijn's most-played openings in our database are: Sicilian: Closed (37 games, 32.4% win rate); English Opening (23 games, 65.2% win rate); Dunst Opening (13 games, 61.5% win rate). The full breakdown of 224 games with White is in the table above.
What openings does Niels Ondersteijn play as Black?
As Black, Niels Ondersteijn most often plays: Pirc Defense (30 games, 23.3% win rate); Sicilian: Accelerated Dragon (27 games, 37.0% win rate); Grünfeld Defense (26 games, 38.5% win rate). See the table above for the top ten Black openings across 230 games.
What is Niels Ondersteijn's FIDE rating?
Niels Ondersteijn is currently rated 2,367 in classical chess, 2,392 in rapid and 2,440 in blitz. Peak classical rating: 2,415 (Oct 2015).
How many games has Niels Ondersteijn played?
Our database contains 454 games by Niels Ondersteijn, covering Apr 2003 to Aug 2026. Overall record: 183 wins, 118 draws, 153 losses (40.3% win rate).
How do I prepare against Niels Ondersteijn?
454 games by Niels Ondersteijn 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.