Prepare against Pieter Claesen
IM · Belgium · World #4,809 classical · FIDE ID 200727
Our database contains 694 games by Pieter Claesen, covering Apr 2003 to Aug 2026. Below you'll find Pieter Claesen's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Pieter Claesen 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 | 2,278 | 2,396 | Apr 2003 |
| Rapid | 2,224 | 2,325 | Sep 2018 |
| Blitz | 2,245 | 2,318 | Sep 2017 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 694 | 220 | 313 | 161 | 31.7% |
| As White | 350 | 125 | 155 | 70 | 35.7% |
| As Black | 344 | 95 | 158 | 91 | 27.6% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Pieter Claesen's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Pieter Claesen's side.
First moves as White (350 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| c4 | 230 | 65.7% | 59.6% |
| d4 | 71 | 20.3% | 55.6% |
| e4 | 30 | 8.6% | 48.3% |
| Nf3 | 12 | 3.4% | 50.0% |
| Nc3 | 5 | 1.4% | 90.0% |
| d3 | 1 | 0.3% | 100.0% |
Main lines as White
- 1.c4 — 66% of White games, 59.6% score
- …e5 (23% of these games) — Claesen usually continues Nc3 (60.8% score)
- …Nf6 (18% of these games) — Claesen usually continues Nc3 (69.0% score)
- …e6 (15% of these games) — Claesen usually continues g3 (41.2% score)
- 1.d4 — 20% of White games, 55.6% score
- …Nf6 (55% of these games) — Claesen usually continues Nf3 (57.1% score)
- …d5 (15% of these games) — Claesen usually continues Nf3 (70.0% score)
- …f5 (11% of these games) — Claesen usually continues Bg5 (50.0% score)
As Black against 1.e4 (159 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| e6 | 131 | 82.4% | 49.6% |
| c6 | 26 | 16.4% | 50.0% |
| e5 | 2 | 1.3% | 0.0% |
As Black against 1.d4 (120 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| Nf6 | 59 | 49.2% | 53.4% |
| d5 | 58 | 48.3% | 53.4% |
| c6 | 3 | 2.5% | 16.7% |
Pieter Claesen's chess games
All 694 games by Pieter Claesen 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: 220 wins, 313 draws, 161 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| A10 | English Opening | 69 | 29/25/15 | 42.0% |
| A28 | English Opening: Reverse Sicilian | 63 | 26/23/14 | 41.3% |
| A36 | English Opening: Symmetrical | 37 | 18/14/5 | 48.6% |
| A21 | Modern Defense | 35 | 11/17/7 | 31.4% |
| D00 | Indian Defense | 24 | 6/15/3 | 25.0% |
| B10 | English Opening: Slav Setup | 13 | 4/8/1 | 30.8% |
| A14 | English Opening: Neo-Catalan | 13 | 3/7/3 | 23.1% |
| A80 | Dutch Defense | 9 | 1/6/2 | 11.1% |
| A45 | Trompowsky Attack | 9 | 3/4/2 | 33.3% |
| B25 | Sicilian: Closed | 8 | 2/4/2 | 25.0% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| D11 | Slav Defense | 61 | 23/25/13 | 37.7% |
| C06 | French: Tarrasch Variation | 42 | 7/23/12 | 16.7% |
| A57 | Benoni Defense | 40 | 15/14/11 | 37.5% |
| C18 | French: Winawer Variation | 36 | 10/17/9 | 27.8% |
| C10 | French Defense | 24 | 3/12/9 | 12.5% |
| B15 | Caro-Kann | 22 | 6/10/6 | 27.3% |
| C02 | French: Advance Variation | 17 | 6/8/3 | 35.3% |
| A07 | Réti Opening | 13 | 1/8/4 | 7.7% |
| A34 | English Opening | 11 | 1/6/4 | 9.1% |
| A34 | English Opening: Symmetrical | 9 | 2/4/3 | 22.2% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Feb 2004 | Alexandre Dgebuadze | 2,552 | chT-BEL 0304 | C01 |
| Jan 1994 | Friso Nijboer | 2,530 | chT-BEL 9394 | C18 |
| Feb 2001 | Luc Winants | 2,515 | chT-BEL 0001 | D16 |
| Jan 1997 | Artur Kogan | 2,515 | 2nd Paks Atom Cup GM | A28 |
| Jan 1993 | Sergey Kishnev | 2,500 | Antwerp Open | A57 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| ch-BEL | 2017 | 109 | 61 | 2,403 |
| Wch U26 | 1994 | 26 | 14.5 | 2,403 |
| ch-BEL Experts | 2007 | 20 | 10 | 2,269 |
| Geraardsbergen Open | 2013 | 18 | 12 | 2,288 |
| Antwerp Open | 1995 | 15 | 7.5 | 2,480 |
| chT-BEL 0001 | 2001 | 14 | 9.5 | 2,474 |
| ch-EU U21 | 1990 | 13 | 7 | 2,380 |
| Wch U20 | 1988 | 13 | 6 | 2,288 |
Frequent opponents
Head-to-head records: Alexandre Dgebuadze (14 games) · Geert Van der Stricht (13 games) · Ekrem Cekro (10 games)
Interactive opening tree from all 694 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Pieter Claesen's chess games?
694 games by Pieter Claesen, 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 Pieter Claesen has played.
What does Pieter Claesen play on the first move as White?
Across 350 games with White in our database, Pieter Claesen opens with 1.c4 (66% of games), 1.d4 (20% of games), 1.e4 (9% of games). Against 1.e4 as Black, Pieter Claesen answers 1...e6 (82% of games), 1...c6 (16% of games), 1...e5 (1% of games). Against 1.d4: 1...Nf6 (49% of games), 1...d5 (48% of games), 1...c6 (3% of games).
What openings does Pieter Claesen play as White?
As White, Pieter Claesen's most-played openings in our database are: English Opening (69 games, 42.0% win rate); English Opening: Reverse Sicilian (63 games, 41.3% win rate); English Opening: Symmetrical (37 games, 48.6% win rate). The full breakdown of 350 games with White is in the table above.
What openings does Pieter Claesen play as Black?
As Black, Pieter Claesen most often plays: Slav Defense (61 games, 37.7% win rate); French: Tarrasch Variation (42 games, 16.7% win rate); Benoni Defense (40 games, 37.5% win rate). See the table above for the top ten Black openings across 344 games.
What is Pieter Claesen's FIDE rating?
Pieter Claesen is currently rated 2,278 in classical chess, 2,224 in rapid and 2,245 in blitz. Peak classical rating: 2,396 (Apr 2003).
How many games has Pieter Claesen played?
Our database contains 694 games by Pieter Claesen, covering Apr 2003 to Aug 2026. Overall record: 220 wins, 313 draws, 161 losses (31.7% win rate).
How do I prepare against Pieter Claesen?
694 games by Pieter Claesen 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.