Prepare against Stefan Diehl
DEU · World #83,442 classical · FIDE ID 24666220
When preparing against Stefan Diehl, expect 1.f4 in 76% of White games. Against 1.e4 the reply is 1...d5 (59% of games); against 1.d4, 1...f5 (38%). Lowest win rate among frequent openings: Bird's opening as White, 34.6% over 52 games.
Our database contains 128 games by Stefan Diehl, covering Oct 2014 to Jul 2026. Below you'll find Stefan Diehl's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Stefan Diehl 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 | 1,779 | 1,878 | Jul 2024 |
| Blitz | 1,887 | 1,887 | Jul 2026 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 128 | 41 | 29 | 58 | 32.0% |
| As White | 68 | 22 | 17 | 29 | 32.4% |
| As Black | 60 | 19 | 12 | 29 | 31.7% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Stefan Diehl's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Stefan Diehl's side.
First moves as White (68 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| f4 | 52 | 76.5% | 50.0% |
| d4 | 14 | 20.6% | 32.1% |
| g3 | 2 | 2.9% | 0.0% |
Main lines as White
- 1.f4 — 76% of White games, 50.0% score
- …d5 (50% of these games) — Diehl usually continues Nf3 (47.9% score)
- …c5 (13% of these games) — Diehl usually continues Nf3 (50.0% score)
- …Nf6 (13% of these games) — Diehl usually continues Nf3 (50.0% score)
- 1.d4 — 21% of White games, 32.1% score
- …d5 (43% of these games) — Diehl usually continues c4 (33.3% score)
- …Nf6 (29% of these games) — Diehl usually continues c4 (12.5% score)
- …c6 (7% of these games) — Diehl usually continues Nf3 (100.0% score)
As Black against 1.e4 (34 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| d5 | 20 | 58.8% | 50.0% |
| c6 | 7 | 20.6% | 42.9% |
| Nf6 | 7 | 20.6% | 28.6% |
As Black against 1.d4 (13 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| f5 | 5 | 38.5% | 70.0% |
| Nf6 | 5 | 38.5% | 20.0% |
| d5 | 2 | 15.4% | 0.0% |
| g6 | 1 | 7.7% | 100.0% |
Stefan Diehl's chess games
All 128 games by Stefan Diehl in the Chess.ceo database (Oct 2014 - 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: 41 wins, 29 draws, 58 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| A03 | Bird's opening | 52 | 18/16/18 | 34.6% |
| D50 | Queen's Gambit | 4 | 2/0/2 | 50.0% |
| D32 | Queen's Gambit Declined | 2 | 0/0/2 | 0.0% |
| A00 | Hungarian Opening | 2 | 0/0/2 | 0.0% |
| D63 | Indian Defense | 1 | 0/0/1 | 0.0% |
| E76 | King's Indian Defense: Four Pawns Attack | 1 | 0/0/1 | 0.0% |
| E30 | Nimzo-Indian: Classical Variation | 1 | 0/0/1 | 0.0% |
| A43 | Benoni Defense | 1 | 0/0/1 | 0.0% |
| D15 | Slav Defense | 1 | 1/0/0 | 100.0% |
| B00 | English Defense | 1 | 1/0/0 | 100.0% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| B01 | Scandinavian Defense: Main Line | 19 | 8/4/7 | 42.1% |
| A80 | Dutch Defense | 6 | 4/1/1 | 66.7% |
| B02 | Alekhine Defense | 6 | 1/2/3 | 16.7% |
| A11 | English Opening | 3 | 1/0/2 | 33.3% |
| A10 | English Opening: Dutch Defense | 3 | 0/0/3 | 0.0% |
| B11 | Caro-Kann: Two Knights Variation | 2 | 0/0/2 | 0.0% |
| B12 | Caro-Kann: Advance Variation | 2 | 0/1/1 | 0.0% |
| B18 | Caro-Kann: Classical | 2 | 1/1/0 | 50.0% |
| A02 | Bird's opening | 2 | 1/0/1 | 50.0% |
| E61 | King's Indian Defense | 2 | 1/1/0 | 50.0% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Jan 1996 | Ingmar Knopp | 2,130 | Giessen Open | D15 |
| May 2019 | Seyed Shaahin Ahmadzadeh Razavi | 2,107 | ch-Frankfurt A | B18 |
| May 2016 | Marko Pfeffer | 1,972 | ch-Frankfurt A | B01 |
| Nov 2023 | Wilhelm Pauls | 1,967 | 9th Heusenstamm Sparkassen Open A | B14 |
| Aug 2013 | Jakob Gauer | 1,898 | 25th Wiesbaden Open | B01 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| ch-Frankfurt A | 2019 | 42 | 20.5 | 1,821 |
| Giessen Open | 1996 | 20 | 6.5 | 2,021 |
| Heusenstamm Schloss Open | 2025 | 14 | 5 | 1,794 |
| chB-Hessen | 2018 | 7 | 5.5 | 1,953 |
| 9th Heusenstamm Sparkassen Open A | 2023 | 7 | 3 | 1,903 |
| 5th Heusenstamm Sparkassen Open A | 2018 | 7 | 2 | 1,717 |
| 25th Wiesbaden Open | 2013 | 7 | 3 | 1,850 |
| ch-Hessen Open B | 2015 | 7 | 4.5 | 1,694 |
Interactive opening tree from all 128 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Stefan Diehl's chess games?
128 games by Stefan Diehl, from Oct 2014 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 Stefan Diehl has played.
What does Stefan Diehl play on the first move as White?
Across 68 games with White in our database, Stefan Diehl opens with 1.f4 (76% of games), 1.d4 (21% of games), 1.g3 (3% of games). Against 1.e4 as Black, Stefan Diehl answers 1...d5 (59% of games), 1...c6 (21% of games), 1...Nf6 (21% of games). Against 1.d4: 1...f5 (38% of games), 1...Nf6 (38% of games), 1...d5 (15% of games).
What openings does Stefan Diehl play as White?
As White, Stefan Diehl's most-played openings in our database are: Bird's opening (52 games, 34.6% win rate); Queen's Gambit (4 games, 50.0% win rate); Queen's Gambit Declined (2 games, 0.0% win rate). The full breakdown of 68 games with White is in the table above.
What openings does Stefan Diehl play as Black?
As Black, Stefan Diehl most often plays: Scandinavian Defense: Main Line (19 games, 42.1% win rate); Dutch Defense (6 games, 66.7% win rate); Alekhine Defense (6 games, 16.7% win rate). See the table above for the top ten Black openings across 60 games.
What is Stefan Diehl's FIDE rating?
Stefan Diehl is currently rated 1,779 in classical chess and 1,887 in blitz. Peak classical rating: 1,878 (Jul 2024).
How many games has Stefan Diehl played?
Our database contains 128 games by Stefan Diehl, covering Oct 2014 to Jul 2026. Overall record: 41 wins, 29 draws, 58 losses (32.0% win rate).
How do I prepare against Stefan Diehl?
128 games by Stefan Diehl 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.