Prepare against Jon Ulfljotsson
Iceland · World #79,835 classical · FIDE ID 2308738
When preparing against Jon Ulfljotsson, expect 1.d4 in 100% of White games. Against 1.e4 the reply is 1...c5 (100% of games); against 1.d4, 1...d5 (53%).
Our database contains 91 games by Jon Ulfljotsson, covering Jul 2010 to Jul 2026. Below you'll find Jon Ulfljotsson's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Jon Ulfljotsson 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 | 1,790 | 1,926 | Sep 2010 |
| Rapid | 1,841 | 1,857 | Dec 2025 |
| Blitz | 1,790 | 1,875 | Sep 2024 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 91 | 25 | 33 | 33 | 27.5% |
| As White | 45 | 16 | 19 | 10 | 35.6% |
| As Black | 46 | 9 | 14 | 23 | 19.6% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Jon Ulfljotsson's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Jon Ulfljotsson's side.
First moves as White (45 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| d4 | 45 | 100.0% | 56.7% |
Main lines as White
- 1.d4 — 100% of White games, 56.7% score
- …Nf6 (47% of these games) — Ulfljotsson usually continues Nf3 (39.3% score)
- …d5 (40% of these games) — Ulfljotsson usually continues Nf3 (65.0% score)
- …f5 (4% of these games) — Ulfljotsson usually continues Nf3 (50.0% score)
As Black against 1.e4 (22 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| c5 | 22 | 100.0% | 45.5% |
As Black against 1.d4 (17 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| d5 | 9 | 52.9% | 16.7% |
| Nf6 | 8 | 47.1% | 18.8% |
Jon Ulfljotsson's chess games
All 91 games by Jon Ulfljotsson in the Chess.ceo database (Jul 2010 - 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: 25 wins, 33 draws, 33 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| D45 | Slav Defense | 8 | 3/4/1 | 37.5% |
| A46 | Indian Defense | 7 | 1/4/2 | 14.3% |
| A05 | King's Indian Defense: Fianchetto Variation | 5 | 1/1/3 | 20.0% |
| D94 | Grünfeld Defense | 5 | 0/4/1 | 0.0% |
| B14 | Colle System | 4 | 2/2/0 | 50.0% |
| A40 | Queen's Pawn Game | 3 | 3/0/0 | 100.0% |
| A44 | Benoni Defense | 2 | 1/0/1 | 50.0% |
| A88 | Dutch Defense | 2 | 0/2/0 | 0.0% |
| E61 | King's Indian Defense | 2 | 0/0/2 | 0.0% |
| D07 | Queen's Gambit Declined | 2 | 2/0/0 | 100.0% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| D36 | Indian Defense | 11 | 0/4/7 | 0.0% |
| B80 | Sicilian: Najdorf | 9 | 2/4/3 | 22.2% |
| B46 | Sicilian | 8 | 5/2/1 | 62.5% |
| A25 | English Opening | 2 | 0/0/2 | 0.0% |
| B30 | Sicilian: Rossolimo | 2 | 0/0/2 | 0.0% |
| D00 | London System | 2 | 0/2/0 | 0.0% |
| B23 | Sicilian: Closed | 2 | 0/0/2 | 0.0% |
| B33 | Sicilian: Four Knights | 1 | 0/0/1 | 0.0% |
| D30 | Slav Defense | 1 | 0/0/1 | 0.0% |
| D04 | Colle System | 1 | 0/0/1 | 0.0% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Nov 2015 | Jon Trausti Hardarson | 2,015 | Gardabaer Open | B46 |
| Jun 2018 | Loftur Baldvinsson | 1,948 | Reykjavik Icelandic Open | A44 |
| Sep 2017 | Kristjan Orn Eliasson | 1,869 | Reykjavik Taflfelag Open | B50 |
| Sep 2017 | Olafur Gudmarsson | 1,721 | Reykjavik Taflfelag Open | B44 |
| Jan 2020 | Kristjan Geirsson | 1,709 | Reykjavik Congress | B88 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| Reykjavik Congress | 2020 | 17 | 9 | 1,895 |
| ch-ISL Open | 2013 | 10 | 4.5 | 1,764 |
| Reykjavik Taflfelag Open | 2017 | 9 | 5 | 1,896 |
| ch-Reykjavik | 2012 | 9 | 5 | 1,700 |
| chB-ISL | 2010 | 8 | 4 | 1,721 |
| chT2-ISL 1415 | 2015 | 6 | 0 | 1,757 |
| ch-Gardabaer | 2017 | 6 | 2 | 1,835 |
| Gardabaer Open | 2015 | 6 | 4 | 1,931 |
Interactive opening tree from all 91 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Jon Ulfljotsson's chess games?
91 games by Jon Ulfljotsson, from Jul 2010 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 Jon Ulfljotsson has played.
What does Jon Ulfljotsson play on the first move as White?
Across 45 games with White in our database, Jon Ulfljotsson opens with 1.d4 (100% of games). Against 1.e4 as Black, Jon Ulfljotsson answers 1...c5 (100% of games). Against 1.d4: 1...d5 (53% of games), 1...Nf6 (47% of games).
What openings does Jon Ulfljotsson play as White?
As White, Jon Ulfljotsson's most-played openings in our database are: Slav Defense (8 games, 37.5% win rate); Indian Defense (7 games, 14.3% win rate); King's Indian Defense: Fianchetto Variation (5 games, 20.0% win rate). The full breakdown of 45 games with White is in the table above.
What openings does Jon Ulfljotsson play as Black?
As Black, Jon Ulfljotsson most often plays: Indian Defense (11 games, 0.0% win rate); Sicilian: Najdorf (9 games, 22.2% win rate); Sicilian (8 games, 62.5% win rate). See the table above for the top ten Black openings across 46 games.
What is Jon Ulfljotsson's FIDE rating?
Jon Ulfljotsson is currently rated 1,790 in classical chess, 1,841 in rapid and 1,790 in blitz. Peak classical rating: 1,926 (Sep 2010).
How many games has Jon Ulfljotsson played?
Our database contains 91 games by Jon Ulfljotsson, covering Jul 2010 to Jul 2026. Overall record: 25 wins, 33 draws, 33 losses (27.5% win rate).
How do I prepare against Jon Ulfljotsson?
91 games by Jon Ulfljotsson 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.