Prepare against John Mortensen
DNK · World #42,669 classical · FIDE ID 1409190
Our database contains 82 games by John Mortensen, covering Jul 2004 to Jul 2026. Below you'll find John Mortensen's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout John Mortensen 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 | 1,923 | 2,173 | Apr 2005 |
| Rapid | 1,949 | 1,966 | Jun 2025 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 82 | 27 | 27 | 28 | 32.9% |
| As White | 40 | 10 | 14 | 16 | 25.0% |
| As Black | 42 | 17 | 13 | 12 | 40.5% |
Move-by-move preparation stats
Straight from the preparation tree built over all of John Mortensen's games — the same tree the interactive prep board lets you walk to any depth. Scores are from John Mortensen's side.
First moves as White (40 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| e4 | 31 | 77.5% | 45.2% |
| d4 | 4 | 10.0% | 50.0% |
| f4 | 3 | 7.5% | 33.3% |
| c4 | 1 | 2.5% | 0.0% |
| Nf3 | 1 | 2.5% | 0.0% |
Main lines as White
- 1.e4 — 78% of White games, 45.2% score
- …c5 (42% of these games) — Mortensen usually continues Nf3 (41.7% score)
- …e5 (23% of these games) — Mortensen usually continues Nf3 (50.0% score)
- …e6 (23% of these games) — Mortensen usually continues d4 (33.3% score)
- 1.d4 — 10% of White games, 50.0% score
- …g6 (50% of these games) — Mortensen usually continues c4 (50.0% score)
- …d5 (25% of these games) — Mortensen usually continues Nf3 (0.0% score)
- …Nf6 (25% of these games) — Mortensen usually continues Nf3 (100.0% score)
As Black against 1.e4 (21 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| c5 | 16 | 76.2% | 59.4% |
| e6 | 4 | 19.0% | 75.0% |
| e5 | 1 | 4.8% | 100.0% |
As Black against 1.d4 (14 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| d5 | 9 | 64.3% | 33.3% |
| f5 | 4 | 28.6% | 87.5% |
| Nf6 | 1 | 7.1% | 100.0% |
John Mortensen's chess games
All 82 games by John Mortensen in the Chess.ceo database (Jul 2004 - 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: 27 wins, 27 draws, 28 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| C03 | French: Tarrasch Variation | 5 | 0/4/1 | 0.0% |
| B22 | Sicilian | 5 | 1/3/1 | 20.0% |
| B51 | Sicilian: Moscow Variation | 4 | 0/2/2 | 0.0% |
| B08 | Modern Defense | 4 | 1/0/3 | 25.0% |
| C49 | Four Knights Game: Spanish Variation | 4 | 1/2/1 | 25.0% |
| A03 | Bird's opening | 3 | 1/0/2 | 33.3% |
| B30 | Sicilian: Rossolimo | 3 | 1/1/1 | 33.3% |
| C00 | King's Indian Attack | 1 | 1/0/0 | 100.0% |
| E91 | King's Indian Defense: Averbakh System | 1 | 1/0/0 | 100.0% |
| C26 | Four Knights Game: Glek System | 1 | 0/0/1 | 0.0% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| B34 | Sicilian: Accelerated Dragon | 6 | 3/1/2 | 50.0% |
| B34 | Sicilian | 5 | 3/1/1 | 60.0% |
| A81 | Dutch Defense | 4 | 3/1/0 | 75.0% |
| A36 | English Opening: Symmetrical | 3 | 0/2/1 | 0.0% |
| C13 | Indian Defense | 3 | 0/2/1 | 0.0% |
| B23 | Sicilian: Closed | 2 | 1/0/1 | 50.0% |
| B31 | Sicilian: Rossolimo | 2 | 1/0/1 | 50.0% |
| D34 | Catalan | 2 | 0/1/1 | 0.0% |
| C03 | French: Tarrasch Variation | 2 | 1/0/1 | 50.0% |
| C02 | French: Advance Variation | 1 | 1/0/0 | 100.0% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Jun 2017 | Momcilo Dragovic | 2,357 | chT-EU Seniors 50 | C46 |
| Oct 2004 | Jose Torres Sanchez | 2,278 | 20th EU-Cup | B34 |
| Oct 2004 | Pierre Gengler | 2,193 | 20th EU-Cup | B39 |
| Aug 2004 | Peter Ulrik Roder | 2,166 | 26th Politiken Cup | A86 |
| Jul 2023 | Malkiel Peretz | 2,158 | chT-EU Seniors 65 | B29 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| WchT Seniors 50 | 2016 | 14 | 6 | 2,008 |
| 36th Politiken Cup | 2014 | 10 | 5 | 2,022 |
| 26th Politiken Cup | 2004 | 10 | 5.5 | 2,224 |
| ch-DEN Seniors 65 | 2020 | 7 | 5 | 2,146 |
| WchT Seniors 65 | 2024 | 7 | 2.5 | 1,864 |
| chT-EU Seniors 65 | 2023 | 7 | 4 | 2,034 |
| 20th EU-Cup | 2004 | 7 | 4 | 2,319 |
| chT-EU Seniors 50 | 2017 | 6 | 2.5 | 2,156 |
Interactive opening tree from all 82 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find John Mortensen's chess games?
82 games by John Mortensen, from Jul 2004 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 John Mortensen has played.
What does John Mortensen play on the first move as White?
Across 40 games with White in our database, John Mortensen opens with 1.e4 (78% of games), 1.d4 (10% of games), 1.f4 (8% of games). Against 1.e4 as Black, John Mortensen answers 1...c5 (76% of games), 1...e6 (19% of games), 1...e5 (5% of games). Against 1.d4: 1...d5 (64% of games), 1...f5 (29% of games), 1...Nf6 (7% of games).
What openings does John Mortensen play as White?
As White, John Mortensen's most-played openings in our database are: French: Tarrasch Variation (5 games, 0.0% win rate); Sicilian (5 games, 20.0% win rate); Sicilian: Moscow Variation (4 games, 0.0% win rate). The full breakdown of 40 games with White is in the table above.
What openings does John Mortensen play as Black?
As Black, John Mortensen most often plays: Sicilian: Accelerated Dragon (6 games, 50.0% win rate); Sicilian (5 games, 60.0% win rate); Dutch Defense (4 games, 75.0% win rate). See the table above for the top ten Black openings across 42 games.
What is John Mortensen's FIDE rating?
John Mortensen is currently rated 1,923 in classical chess, 1,949 in rapid. Peak classical rating: 2,173 (Apr 2005).
How many games has John Mortensen played?
Our database contains 82 games by John Mortensen, covering Jul 2004 to Jul 2026. Overall record: 27 wins, 27 draws, 28 losses (32.9% win rate).
How do I prepare against John Mortensen?
82 games by John Mortensen 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.