Prepare against Carl-Otto Nielsen
DNK · World #53,382 classical · FIDE ID 1411870
When preparing against Carl-Otto Nielsen, expect 1.d4 in 86% of White games. Against 1.e4 the reply is 1...c5 (74% of games); against 1.d4, 1...Nf6 (79%).
Our database contains 87 games by Carl-Otto Nielsen, covering Apr 2005 to Jul 2026. Below you'll find Carl-Otto Nielsen's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Carl-Otto Nielsen 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 | 1,880 | 1,978 | Jul 2005 |
| Rapid | 1,834 | 1,872 | Jun 2026 |
| Blitz | 1,802 | 1,854 | May 2025 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 87 | 33 | 22 | 32 | 37.9% |
| As White | 43 | 21 | 13 | 9 | 48.8% |
| As Black | 44 | 12 | 9 | 23 | 27.3% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Carl-Otto Nielsen's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Carl-Otto Nielsen's side.
First moves as White (43 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| d4 | 37 | 86.0% | 62.2% |
| e4 | 4 | 9.3% | 62.5% |
| b4 | 2 | 4.7% | 100.0% |
Main lines as White
- 1.d4 — 86% of White games, 62.2% score
- …Nf6 (65% of these games) — Nielsen usually continues c4 (61.4% score)
- …d5 (22% of these games) — Nielsen usually continues c4 (83.3% score)
- …f5 (5% of these games) — Nielsen usually continues g3 (50.0% score)
- 1.e4 — 9% of White games, 62.5% score
- …e5 (50% of these games) — Nielsen usually continues Nf3 (100.0% score)
- …c6 (25% of these games) — Nielsen usually continues c3 (0.0% score)
- …c5 (25% of these games) — Nielsen usually continues Nf3 (50.0% score)
As Black against 1.e4 (19 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| c5 | 14 | 73.7% | 32.1% |
| c6 | 4 | 21.1% | 62.5% |
| g6 | 1 | 5.3% | 0.0% |
As Black against 1.d4 (14 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| Nf6 | 11 | 78.6% | 27.3% |
| d5 | 3 | 21.4% | 33.3% |
Carl-Otto Nielsen's chess games
All 87 games by Carl-Otto Nielsen in the Chess.ceo database (Apr 2005 - 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: 33 wins, 22 draws, 32 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| E43 | Nimzo-Indian: Rubinstein System | 5 | 3/1/1 | 60.0% |
| A55 | Indian Defense | 4 | 1/3/0 | 25.0% |
| D13 | Slav Defense | 4 | 1/2/1 | 25.0% |
| D87 | Grünfeld Defense | 4 | 0/1/3 | 0.0% |
| A51 | Budapest Defense | 3 | 3/0/0 | 100.0% |
| A57 | Benoni Defense | 2 | 1/1/0 | 50.0% |
| D06 | Queen's Gambit | 2 | 1/1/0 | 50.0% |
| A80 | Dutch Defense | 2 | 1/1/0 | 50.0% |
| E63 | King's Indian Defense | 2 | 1/0/1 | 50.0% |
| A00 | Orangutan opening | 2 | 2/0/0 | 100.0% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| B33 | Sicilian: Sveshnikov | 5 | 2/1/2 | 40.0% |
| B46 | Sicilian | 5 | 1/0/4 | 20.0% |
| A24 | English Opening | 5 | 1/1/3 | 20.0% |
| A45 | Trompowsky Attack | 4 | 0/1/3 | 0.0% |
| D36 | Indian Defense | 3 | 0/0/3 | 0.0% |
| B30 | Sicilian: Rossolimo | 2 | 0/1/1 | 0.0% |
| A05 | Réti Opening | 2 | 2/0/0 | 100.0% |
| E20 | Nimzo-Indian Defense | 2 | 1/0/1 | 50.0% |
| B22 | Sicilian: Alapin | 2 | 0/1/1 | 0.0% |
| A00 | Dunst Opening | 1 | 0/0/1 | 0.0% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Mar 2002 | Morten Lyck Hansen | 1,829 | 13th Lovsprings Open B | D74 |
| Apr 2000 | Lars Jorgensen | 1,801 | Lovsprings Open 11th B | D52 |
| Apr 2004 | Per Christiansen | 1,764 | ch-DEN B5 Gr2 | D35 |
| May 1998 | Morten Henrik Olsen | 1,724 | 10th B Lovsprings Open | A09 |
| Apr 2001 | John Holst | 1,711 | Lovsprings Open 12th B | B00 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| 30th Politiken Cup | 2008 | 10 | 5 | 2,174 |
| 27th Politiken Cup | 2005 | 10 | 4.5 | 2,149 |
| 08th Lovsprings Open C | 1996 | 7 | 5.5 | 1,792 |
| 09th Lovsprings Open C | 1997 | 7 | 3.5 | 1,615 |
| Lovsprings Open 12th B | 2001 | 7 | 3 | 1,698 |
| Lovsprings Open 11th B | 2000 | 7 | 3.5 | 1,753 |
| 13th Lovsprings Open B | 2002 | 6 | 3 | 1,776 |
| 10th B Lovsprings Open | 1998 | 6 | 2.5 | 1,690 |
Interactive opening tree from all 87 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Carl-Otto Nielsen's chess games?
87 games by Carl-Otto Nielsen, from Apr 2005 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 Carl-Otto Nielsen has played.
What does Carl-Otto Nielsen play on the first move as White?
Across 43 games with White in our database, Carl-Otto Nielsen opens with 1.d4 (86% of games), 1.e4 (9% of games), 1.b4 (5% of games). Against 1.e4 as Black, Carl-Otto Nielsen answers 1...c5 (74% of games), 1...c6 (21% of games), 1...g6 (5% of games). Against 1.d4: 1...Nf6 (79% of games), 1...d5 (21% of games).
What openings does Carl-Otto Nielsen play as White?
As White, Carl-Otto Nielsen's most-played openings in our database are: Nimzo-Indian: Rubinstein System (5 games, 60.0% win rate); Indian Defense (4 games, 25.0% win rate); Slav Defense (4 games, 25.0% win rate). The full breakdown of 43 games with White is in the table above.
What openings does Carl-Otto Nielsen play as Black?
As Black, Carl-Otto Nielsen most often plays: Sicilian: Sveshnikov (5 games, 40.0% win rate); Sicilian (5 games, 20.0% win rate); English Opening (5 games, 20.0% win rate). See the table above for the top ten Black openings across 44 games.
What is Carl-Otto Nielsen's FIDE rating?
Carl-Otto Nielsen is currently rated 1,880 in classical chess, 1,834 in rapid and 1,802 in blitz. Peak classical rating: 1,978 (Jul 2005).
How many games has Carl-Otto Nielsen played?
Our database contains 87 games by Carl-Otto Nielsen, covering Apr 2005 to Jul 2026. Overall record: 33 wins, 22 draws, 32 losses (37.9% win rate).
How do I prepare against Carl-Otto Nielsen?
87 games by Carl-Otto Nielsen 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.