Prepare against Claus Marcussen
DNK · World #73,740 classical · FIDE ID 1506021
When preparing against Claus Marcussen, expect 1.f4 in 100% of White games. Against 1.e4 the reply is 1...e5 (65% of games); against 1.d4, 1...f5 (100%). Lowest win rate among frequent openings: Dutch Defense as Black, 27.8% over 18 games.
Our database contains 94 games by Claus Marcussen, covering Jan 2006 to Jul 2026. Below you'll find Claus Marcussen's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Claus Marcussen 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 | 1,809 | 2,024 | Oct 2006 |
| Rapid | 1,860 | 1,881 | Sep 2025 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 94 | 31 | 14 | 49 | 33.0% |
| As White | 47 | 19 | 6 | 22 | 40.4% |
| As Black | 47 | 12 | 8 | 27 | 25.5% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Claus Marcussen's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Claus Marcussen's side.
First moves as White (47 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| f4 | 47 | 100.0% | 46.8% |
Main lines as White
- 1.f4 — 100% of White games, 46.8% score
- …d5 (62% of these games) — Marcussen usually continues Nf3 (51.7% score)
- …Nf6 (9% of these games) — Marcussen usually continues Nf3 (50.0% score)
- …e5 (9% of these games) — Marcussen usually continues fxe5 (62.5% score)
As Black against 1.e4 (23 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| e5 | 15 | 65.2% | 50.0% |
| d5 | 8 | 34.8% | 0.0% |
As Black against 1.d4 (18 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| f5 | 18 | 100.0% | 38.9% |
Claus Marcussen's chess games
All 94 games by Claus Marcussen in the Chess.ceo database (Jan 2006 - 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: 31 wins, 14 draws, 49 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| A03 | Bird's opening | 47 | 19/6/22 | 40.4% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| A90 | Dutch Defense | 18 | 5/4/9 | 27.8% |
| B01 | Scandinavian Defense: Main Line | 6 | 0/0/6 | 0.0% |
| C45 | Scotch Game | 3 | 1/2/0 | 33.3% |
| A07 | Réti Opening | 3 | 0/0/3 | 0.0% |
| C87 | Ruy Lopez: Steinitz Defense Deferred | 2 | 1/1/0 | 50.0% |
| C50 | Italian Game | 2 | 0/0/2 | 0.0% |
| C22 | Center Game | 2 | 0/0/2 | 0.0% |
| C30 | King's Gambit | 2 | 1/0/1 | 50.0% |
| B01 | Scandinavian Defense | 1 | 0/0/1 | 0.0% |
| A06 | Nimzo-Larsen Attack | 1 | 0/0/1 | 0.0% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Jun 2014 | Carsten Bank Friis | 2,259 | Fredericia Spring A | A02 |
| Aug 2013 | Hagen Jurkatis | 2,094 | 12th Rostock SSC Open | A03 |
| Aug 2013 | Viktor Pererva | 2,019 | 12th Rostock SSC Open | C87 |
| Jul 2005 | Stefan Wiecker | 1,985 | 27th Politiken Cup | A02 |
| May 2013 | Anders Munch | 1,937 | Fredericia Glenco B | D00 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| 22nd North Sea Cup | 2007 | 10 | 5 | 2,107 |
| 27th Politiken Cup | 2005 | 10 | 5 | 2,088 |
| 31st Kiel Open | 2018 | 9 | 3 | 1,680 |
| Fredericia-ch B | 2013 | 9 | 5 | 1,807 |
| 28th Politiken Cup | 2006 | 9 | 4 | 2,090 |
| 11th Rostock SSC 07 Open | 2012 | 7 | 3 | 1,562 |
| 12th Rostock SSC Open | 2013 | 7 | 4 | 2,011 |
| Fredericia Foraar B | 2012 | 5 | 2 | 1,726 |
Interactive opening tree from all 94 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Claus Marcussen's chess games?
94 games by Claus Marcussen, from Jan 2006 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 Claus Marcussen has played.
What does Claus Marcussen play on the first move as White?
Across 47 games with White in our database, Claus Marcussen opens with 1.f4 (100% of games). Against 1.e4 as Black, Claus Marcussen answers 1...e5 (65% of games), 1...d5 (35% of games). Against 1.d4: 1...f5 (100% of games).
What openings does Claus Marcussen play as White?
As White, Claus Marcussen's most-played openings in our database are: Bird's opening (47 games, 40.4% win rate). The full breakdown of 47 games with White is in the table above.
What openings does Claus Marcussen play as Black?
As Black, Claus Marcussen most often plays: Dutch Defense (18 games, 27.8% win rate); Scandinavian Defense: Main Line (6 games, 0.0% win rate); Scotch Game (3 games, 33.3% win rate). See the table above for the top ten Black openings across 47 games.
What is Claus Marcussen's FIDE rating?
Claus Marcussen is currently rated 1,809 in classical chess, 1,860 in rapid. Peak classical rating: 2,024 (Oct 2006).
How many games has Claus Marcussen played?
Our database contains 94 games by Claus Marcussen, covering Jan 2006 to Jul 2026. Overall record: 31 wins, 14 draws, 49 losses (33.0% win rate).
How do I prepare against Claus Marcussen?
94 games by Claus Marcussen 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.