Prepare against Bruce Diesen
FM · Norway · World #21,433 classical · FIDE ID 1500139
When preparing against Bruce Diesen, expect 1.e4 in 77% of White games. Against 1.e4 the reply is 1...e5 (45% of games); against 1.d4, 1...Nf6 (85%). Lowest win rate among frequent openings: Sicilian as White, 30.0% over 20 games.
Our database contains 277 games by Bruce Diesen, covering Apr 2003 to Jul 2026. Below you'll find Bruce Diesen's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Bruce Diesen 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 | 2,045 | 2,271 | Oct 2005 |
| Rapid | 1,992 | 2,133 | Jun 2022 |
| Blitz | 2,026 | 2,170 | Aug 2017 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 277 | 114 | 44 | 119 | 41.2% |
| As White | 144 | 58 | 29 | 57 | 40.3% |
| As Black | 133 | 56 | 15 | 62 | 42.1% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Bruce Diesen's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Bruce Diesen's side.
First moves as White (144 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| e4 | 111 | 77.1% | 48.6% |
| d4 | 17 | 11.8% | 55.9% |
| Nf3 | 9 | 6.3% | 50.0% |
| f4 | 3 | 2.1% | 50.0% |
| c4 | 3 | 2.1% | 66.7% |
| g3 | 1 | 0.7% | 100.0% |
Main lines as White
- 1.e4 — 77% of White games, 48.6% score
- …c5 (45% of these games) — Diesen usually continues Nf3 (45.9% score)
- …e5 (19% of these games) — Diesen usually continues Nf3 (54.8% score)
- …e6 (15% of these games) — Diesen usually continues d4 (46.4% score)
- 1.d4 — 12% of White games, 55.9% score
- …Nf6 (59% of these games) — Diesen usually continues c4 (61.1% score)
- …f5 (24% of these games) — Diesen usually continues g3 (0.0% score)
- …d5 (12% of these games) — Diesen usually continues c4 (100.0% score)
As Black against 1.e4 (49 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| e5 | 22 | 44.9% | 31.8% |
| c5 | 22 | 44.9% | 54.5% |
| e6 | 4 | 8.2% | 25.0% |
| c6 | 1 | 2.0% | 100.0% |
As Black against 1.d4 (61 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| Nf6 | 52 | 85.2% | 52.9% |
| f5 | 8 | 13.1% | 62.5% |
| c5 | 1 | 1.6% | 100.0% |
Bruce Diesen's chess games
All 277 games by Bruce Diesen in the Chess.ceo database (Apr 2003 - 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: 114 wins, 44 draws, 119 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| B40 | Sicilian | 20 | 6/4/10 | 30.0% |
| B12 | Caro-Kann: Advance Variation | 8 | 3/1/4 | 37.5% |
| C89 | Ruy Lopez: Closed | 8 | 3/2/3 | 37.5% |
| C18 | French: Winawer Variation | 7 | 3/1/3 | 42.9% |
| B76 | Sicilian: Dragon | 5 | 3/1/1 | 60.0% |
| B90 | Sicilian: Najdorf | 5 | 0/1/4 | 0.0% |
| A05 | Réti Opening | 5 | 1/1/3 | 20.0% |
| A80 | Dutch Defense | 5 | 1/1/3 | 20.0% |
| C42 | Petrov's Defense | 5 | 2/1/2 | 40.0% |
| B33 | Sicilian: Sveshnikov | 5 | 2/0/3 | 40.0% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| E17 | Queen's Indian Defense | 23 | 10/2/11 | 43.5% |
| C91 | Ruy Lopez: Closed | 10 | 4/1/5 | 40.0% |
| A47 | Indian Defense | 9 | 4/2/3 | 44.4% |
| A81 | Dutch Defense | 8 | 5/0/3 | 62.5% |
| B90 | Sicilian: Najdorf | 7 | 1/0/6 | 14.3% |
| A25 | English Opening: Reverse Sicilian | 6 | 3/0/3 | 50.0% |
| E42 | Nimzo-Indian: Rubinstein System | 5 | 1/1/3 | 20.0% |
| A45 | Trompowsky Attack | 5 | 3/0/2 | 60.0% |
| B42 | Sicilian | 4 | 3/0/1 | 75.0% |
| A17 | English Opening | 4 | 2/0/2 | 50.0% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Jan 1990 | Peter Lukacs | 2,505 | ch-Helsinki Club | C92 |
| Jan 1990 | Einar J Gausel | 2,440 | chT-NOR | E11 |
| Apr 2013 | Andreas G.R. Moen | 2,390 | chT-NOR 1213 | B90 |
| Jan 1989 | Antti Pyhala | 2,385 | Helsinki | A80 |
| Sep 2005 | Rudy Van Wessel | 2,327 | 21st EU-Cup | E12 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| ch-NOR | 1991 | 38 | 14.5 | 2,221 |
| chT-NOR | 2006 | 32 | 17.5 | 2,265 |
| chT-NOR east | 1994 | 23 | 15.5 | 2,488 |
| Helsinki | 1989 | 11 | 6.5 | 2,427 |
| Oslo-B | 1992 | 9 | 1 | 2,020 |
| chT-NOR 1213 | 2013 | 9 | 5.5 | 2,295 |
| chT-NOR Clubs | 2022 | 8 | 4.5 | 2,102 |
| ch-Helsinki Club | 1990 | 8 | 5 | 2,434 |
Interactive opening tree from all 277 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Bruce Diesen's chess games?
277 games by Bruce Diesen, from Apr 2003 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 Bruce Diesen has played.
What does Bruce Diesen play on the first move as White?
Across 144 games with White in our database, Bruce Diesen opens with 1.e4 (77% of games), 1.d4 (12% of games), 1.Nf3 (6% of games). Against 1.e4 as Black, Bruce Diesen answers 1...e5 (45% of games), 1...c5 (45% of games), 1...e6 (8% of games). Against 1.d4: 1...Nf6 (85% of games), 1...f5 (13% of games), 1...c5 (2% of games).
What openings does Bruce Diesen play as White?
As White, Bruce Diesen's most-played openings in our database are: Sicilian (20 games, 30.0% win rate); Caro-Kann: Advance Variation (8 games, 37.5% win rate); Ruy Lopez: Closed (8 games, 37.5% win rate). The full breakdown of 144 games with White is in the table above.
What openings does Bruce Diesen play as Black?
As Black, Bruce Diesen most often plays: Queen's Indian Defense (23 games, 43.5% win rate); Ruy Lopez: Closed (10 games, 40.0% win rate); Indian Defense (9 games, 44.4% win rate). See the table above for the top ten Black openings across 133 games.
What is Bruce Diesen's FIDE rating?
Bruce Diesen is currently rated 2,045 in classical chess, 1,992 in rapid and 2,026 in blitz. Peak classical rating: 2,271 (Oct 2005).
How many games has Bruce Diesen played?
Our database contains 277 games by Bruce Diesen, covering Apr 2003 to Jul 2026. Overall record: 114 wins, 44 draws, 119 losses (41.2% win rate).
How do I prepare against Bruce Diesen?
277 games by Bruce Diesen 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.