Prepare against Klaas Aalbers
NLD · World #36,761 classical · FIDE ID 1024388
Our database contains 41 games by Klaas Aalbers, covering Sep 2009 to Jul 2026. Below you'll find Klaas Aalbers's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Klaas Aalbers 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 | 1,950 | 1,959 | Mar 2026 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 41 | 17 | 7 | 17 | 41.5% |
| As White | 20 | 8 | 2 | 10 | 40.0% |
| As Black | 21 | 9 | 5 | 7 | 42.9% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Klaas Aalbers's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Klaas Aalbers's side.
First moves as White (20 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| e4 | 20 | 100.0% | 45.0% |
Main lines as White
- 1.e4 — 100% of White games, 45.0% score
- …c5 (40% of these games) — Aalbers usually continues d4 (37.5% score)
- …e6 (20% of these games) — Aalbers usually continues d4 (25.0% score)
- …e5 (20% of these games) — Aalbers usually continues f4 (75.0% score)
As Black against 1.e4 (7 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| e5 | 7 | 100.0% | 85.7% |
As Black against 1.d4 (11 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| d5 | 9 | 81.8% | 38.9% |
| Nf6 | 2 | 18.2% | 75.0% |
Klaas Aalbers's chess games
All 41 games by Klaas Aalbers in the Chess.ceo database (Sep 2009 - Jul 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: 17 wins, 7 draws, 17 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| B21 | Sicilian: Smith-Morra Gambit | 8 | 2/2/4 | 25.0% |
| C01 | French Defense | 4 | 1/0/3 | 25.0% |
| C30 | King's Gambit | 4 | 3/0/1 | 75.0% |
| A43 | Pirc Defense | 2 | 1/0/1 | 50.0% |
| D00 | Blackmar-Diemer Gambit | 1 | 1/0/0 | 100.0% |
| B13 | Caro-Kann: Exchange Variation | 1 | 0/0/1 | 0.0% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| A84 | Slav Defense | 6 | 0/2/4 | 0.0% |
| C40 | Latvian Gambit | 5 | 4/0/1 | 80.0% |
| A84 | Semi-Slav Defense | 3 | 2/1/0 | 66.7% |
| A51 | Budapest Defense | 2 | 1/1/0 | 50.0% |
| C50 | Italian Game | 1 | 1/0/0 | 100.0% |
| A84 | Queen's Pawn Game | 1 | 0/0/1 | 0.0% |
| A00 | Hungarian Opening | 1 | 0/0/1 | 0.0% |
| A84 | Queen's Gambit Declined | 1 | 0/1/0 | 0.0% |
| C34 | King's Gambit | 1 | 1/0/0 | 100.0% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| May 2009 | Evert Leeuwenburgh | 2,056 | ch-Leiden SB | C40 |
| Jun 2007 | Frans Vreugdenhil | 1,944 | ch-Leiden SB | C37 |
| Jun 2004 | Marco Anink | 1,890 | chB-Leiden SB | A84 |
| Jun 2008 | Jura Agaian | 1,840 | ch-Leiden SB | B00 |
| Jun 2008 | Martijn Otten | 1,796 | ch-Leiden SB | A84 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| ch-Leiden SB | 2009 | 32 | 15 | 1,863 |
| chB-Leiden SB | 2004 | 7 | 5.5 | 1,956 |
| 68th Leiden Noteboom Memorial | 2008 | 2 | 0 | 1,847 |
Interactive opening tree from all 41 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Klaas Aalbers's chess games?
41 games by Klaas Aalbers, from Sep 2009 to Jul 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 Klaas Aalbers has played.
What does Klaas Aalbers play on the first move as White?
Across 20 games with White in our database, Klaas Aalbers opens with 1.e4 (100% of games). Against 1.e4 as Black, Klaas Aalbers answers 1...e5 (100% of games). Against 1.d4: 1...d5 (82% of games), 1...Nf6 (18% of games).
What openings does Klaas Aalbers play as White?
As White, Klaas Aalbers's most-played openings in our database are: Sicilian: Smith-Morra Gambit (8 games, 25.0% win rate); French Defense (4 games, 25.0% win rate); King's Gambit (4 games, 75.0% win rate). The full breakdown of 20 games with White is in the table above.
What openings does Klaas Aalbers play as Black?
As Black, Klaas Aalbers most often plays: Slav Defense (6 games, 0.0% win rate); Latvian Gambit (5 games, 80.0% win rate); Semi-Slav Defense (3 games, 66.7% win rate). See the table above for the top ten Black openings across 21 games.
What is Klaas Aalbers's FIDE rating?
Klaas Aalbers is currently rated 1,950 in classical chess. Peak classical rating: 1,959 (Mar 2026).
How many games has Klaas Aalbers played?
Our database contains 41 games by Klaas Aalbers, covering Sep 2009 to Jul 2026. Overall record: 17 wins, 7 draws, 17 losses (41.5% win rate).
How do I prepare against Klaas Aalbers?
41 games by Klaas Aalbers 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.