Prepare against Bert Duijker
NLD · World #59,605 classical · FIDE ID 1025015
When preparing against Bert Duijker, expect 1.Nf3 in 96% of White games. Against 1.e4 the reply is 1...g6 (85% of games); against 1.d4, 1...g6 (92%). Lowest win rate among frequent openings: Indian Defense as White, 23.5% over 17 games.
Our database contains 221 games by Bert Duijker, covering Jan 2008 to Sep 2026. Below you'll find Bert Duijker's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Bert Duijker 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 | 1,857 | 1,937 | Dec 2015 |
| Rapid | 1,925 | 1,925 | Sep 2026 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 221 | 64 | 86 | 71 | 29.0% |
| As White | 108 | 35 | 40 | 33 | 32.4% |
| As Black | 113 | 29 | 46 | 38 | 25.7% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Bert Duijker's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Bert Duijker's side.
First moves as White (108 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| Nf3 | 104 | 96.3% | 51.0% |
| c4 | 3 | 2.8% | 33.3% |
| g3 | 1 | 0.9% | 100.0% |
Main lines as White
- 1.Nf3 — 96% of White games, 51.0% score
- …Nf6 (37% of these games) — Duijker usually continues c4 (48.7% score)
- …d5 (31% of these games) — Duijker usually continues d4 (45.5% score)
- …f5 (10% of these games) — Duijker usually continues d4 (44.4% score)
- 1.c4 — 3% of White games, 33.3% score
- …c5 (33% of these games) — Duijker usually continues Nf3 (50.0% score)
- …Nf6 (33% of these games) — Duijker usually continues Nf3 (0.0% score)
- …e6 (33% of these games) — Duijker usually continues Nc3 (50.0% score)
As Black against 1.e4 (41 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| g6 | 35 | 85.4% | 45.7% |
| d6 | 6 | 14.6% | 58.3% |
As Black against 1.d4 (37 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| g6 | 34 | 91.9% | 57.4% |
| f5 | 2 | 5.4% | 50.0% |
| d6 | 1 | 2.7% | 50.0% |
Bert Duijker's chess games
All 221 games by Bert Duijker in the Chess.ceo database (Jan 2008 - Sep 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: 64 wins, 86 draws, 71 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| D07 | Queen's Pawn Game | 21 | 6/8/7 | 28.6% |
| E62 | Indian Defense | 17 | 4/9/4 | 23.5% |
| B38 | English Opening | 16 | 6/5/5 | 37.5% |
| D02 | Réti Opening | 12 | 7/1/4 | 58.3% |
| A87 | Dutch Defense | 10 | 1/6/3 | 10.0% |
| B38 | English Opening: Symmetrical | 7 | 2/2/3 | 28.6% |
| A42 | Modern Defense | 5 | 0/3/2 | 0.0% |
| A53 | Old Indian | 4 | 3/1/0 | 75.0% |
| E01 | Catalan | 4 | 2/0/2 | 50.0% |
| A30 | Queen's Indian Defense | 4 | 1/2/1 | 25.0% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| B06 | Modern Defense | 76 | 22/31/23 | 28.9% |
| A02 | Bird's opening | 6 | 1/2/3 | 16.7% |
| B06 | Pirc Defense | 6 | 2/3/1 | 33.3% |
| A01 | Nimzovich-Larsen attack | 5 | 1/1/3 | 20.0% |
| A04 | Dutch Defense | 4 | 1/2/1 | 25.0% |
| A21 | English Opening | 4 | 0/1/3 | 0.0% |
| A41 | Réti Opening | 3 | 0/1/2 | 0.0% |
| A48 | Indian Defense | 3 | 1/2/0 | 33.3% |
| A36 | English Opening: Symmetrical | 2 | 0/1/1 | 0.0% |
| A08 | Sicilian: Hyperaccelerated Dragon | 1 | 0/1/0 | 0.0% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Sep 2023 | Bernhard Geyer | 2,164 | 20th Rheinland Pfalz Seniors Open | E91 |
| May 2016 | Egon Bomert | 2,089 | 12th ch-Hessen Seniors Open | A42 |
| Sep 2016 | Peter Heinzel | 2,050 | 10th ch-Schleswig Holstein Seniors Open | A00 |
| Jan 2002 | Rudolf Berti | 2,033 | Schwarzach Open B | D40 |
| Oct 2015 | Hans-Peter Kluger | 2,015 | 9th ch-Schleswig Holstein Seniors Open | D11 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| 21st Dresden ZMD Open B | 2012 | 9 | 4.5 | 1,726 |
| 14th Rheinland Pfalz Open Seniors | 2016 | 9 | 4.5 | 1,920 |
| 19th Altenkirchen Seniors Open | 2022 | 9 | 3.5 | 1,731 |
| 11th ch-Hessen Seniors Open | 2015 | 9 | 4.5 | 1,965 |
| Oslo Vederhus Memorial Open B | 2013 | 9 | 4.5 | 1,697 |
| 7th ch-Hessen Seniors Open | 2011 | 9 | 5 | 1,796 |
| 18th Altenkirchen Seniors Open | 2021 | 9 | 5 | 2,034 |
| 11th ch-Schleswig Holstein Seniors Open | 2017 | 9 | 5.5 | 1,974 |
Interactive opening tree from all 221 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Bert Duijker's chess games?
221 games by Bert Duijker, from Jan 2008 to Sep 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 Bert Duijker has played.
What does Bert Duijker play on the first move as White?
Across 108 games with White in our database, Bert Duijker opens with 1.Nf3 (96% of games), 1.c4 (3% of games), 1.g3 (1% of games). Against 1.e4 as Black, Bert Duijker answers 1...g6 (85% of games), 1...d6 (15% of games). Against 1.d4: 1...g6 (92% of games), 1...f5 (5% of games), 1...d6 (3% of games).
What openings does Bert Duijker play as White?
As White, Bert Duijker's most-played openings in our database are: Queen's Pawn Game (21 games, 28.6% win rate); Indian Defense (17 games, 23.5% win rate); English Opening (16 games, 37.5% win rate). The full breakdown of 108 games with White is in the table above.
What openings does Bert Duijker play as Black?
As Black, Bert Duijker most often plays: Modern Defense (76 games, 28.9% win rate); Bird's opening (6 games, 16.7% win rate); Pirc Defense (6 games, 33.3% win rate). See the table above for the top ten Black openings across 113 games.
What is Bert Duijker's FIDE rating?
Bert Duijker is currently rated 1,857 in classical chess, 1,925 in rapid. Peak classical rating: 1,937 (Dec 2015).
How many games has Bert Duijker played?
Our database contains 221 games by Bert Duijker, covering Jan 2008 to Sep 2026. Overall record: 64 wins, 86 draws, 71 losses (29.0% win rate).
How do I prepare against Bert Duijker?
221 games by Bert Duijker 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.