Prepare against Onni Korjus
Finland · World #29,353 classical · FIDE ID 350191043
Our database contains 36 games by Onni Korjus, covering Aug 2018 to Jul 2026. Below you'll find Onni Korjus's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Onni Korjus 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 | 1,990 | 1,990 | Jul 2026 |
| Rapid | 1,927 | 1,932 | Aug 2024 |
| Blitz | 1,943 | 2,057 | Dec 2023 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 36 | 11 | 7 | 18 | 30.6% |
| As White | 21 | 8 | 4 | 9 | 38.1% |
| As Black | 15 | 3 | 3 | 9 | 20.0% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Onni Korjus's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Onni Korjus's side.
First moves as White (21 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| e4 | 18 | 85.7% | 50.0% |
| d4 | 2 | 9.5% | 0.0% |
| Nf3 | 1 | 4.8% | 100.0% |
Main lines as White
- 1.e4 — 86% of White games, 50.0% score
- …c5 (56% of these games) — Korjus usually continues Nf3 (40.0% score)
- …e5 (22% of these games) — Korjus usually continues Nf3 (75.0% score)
- …g6 (11% of these games) — Korjus usually continues d4 (50.0% score)
- 1.d4 — 10% of White games, 0.0% score
- …Nf6 (50% of these games) — Korjus usually continues Nf3 (0.0% score)
- …d5 (50% of these games) — Korjus usually continues c4 (0.0% score)
As Black against 1.e4 (3 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| e5 | 3 | 100.0% | 16.7% |
As Black against 1.d4 (8 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| Nf6 | 7 | 87.5% | 35.7% |
| d5 | 1 | 12.5% | 0.0% |
Onni Korjus's chess games
All 36 games by Onni Korjus in the Chess.ceo database (Aug 2018 - 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: 11 wins, 7 draws, 18 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| B31 | Sicilian: Rossolimo | 5 | 0/2/3 | 0.0% |
| B07 | Modern Defense | 2 | 1/0/1 | 50.0% |
| C70 | Ruy Lopez: Morphy Defense | 2 | 2/0/0 | 100.0% |
| B22 | Sicilian | 2 | 2/0/0 | 100.0% |
| A13 | Nimzo-Larsen Attack | 1 | 1/0/0 | 100.0% |
| C42 | Petrov's Defense | 1 | 0/1/0 | 0.0% |
| B15 | Caro-Kann | 1 | 0/0/1 | 0.0% |
| B36 | Sicilian: Accelerated Dragon | 1 | 0/0/1 | 0.0% |
| B39 | Sicilian: Hyperaccelerated Dragon | 1 | 1/0/0 | 100.0% |
| B52 | Sicilian: Moscow Variation | 1 | 0/0/1 | 0.0% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| D35 | Indian Defense | 2 | 0/0/2 | 0.0% |
| E36 | Nimzo-Indian: Classical Variation | 2 | 1/0/1 | 50.0% |
| A29 | English Opening: Reverse Sicilian | 1 | 0/0/1 | 0.0% |
| A11 | English Opening: Slav Setup | 1 | 0/1/0 | 0.0% |
| A00 | Hungarian Opening | 1 | 1/0/0 | 100.0% |
| C52 | Italian Game: Evans Gambit | 1 | 0/0/1 | 0.0% |
| B13 | London System | 1 | 0/0/1 | 0.0% |
| D38 | Nimzo-Indian Defense | 1 | 1/0/0 | 100.0% |
| E49 | Nimzo-Indian: Rubinstein System | 1 | 0/0/1 | 0.0% |
| C44 | Ponziani Opening | 1 | 0/1/0 | 0.0% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Jul 2023 | Risto Nevanlinna | 2,208 | 31st Heart of Finland Open | C70 |
| Aug 2019 | Danilo Pobor | 2,130 | ch-EU U18 | B41 |
| Aug 2019 | Adesh Easwaralingam | 2,109 | ch-EU U18 | C00 |
| Jul 2024 | Ralf Rehn | 2,101 | 32nd Heart of Finland Open | B22 |
| Aug 2019 | Helge Ruotanen | 1,920 | ch-FIN rapid | A00 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| ch-FIN rapid | 2019 | 8 | 5 | 1,917 |
| ch-EU U18 | 2019 | 8 | 2.5 | 1,884 |
| ch-FIN U18/20 | 2019 | 7 | 3 | 1,877 |
| 32nd Heart of Finland Open | 2024 | 6 | 2 | 1,953 |
| 31st Heart of Finland Open | 2023 | 5 | 2 | 2,073 |
| 33rd Heart of Finland Open | 2025 | 1 | 0 | 2,064 |
| 30th Heart of Finland Open | 2022 | 1 | 0 | 2,077 |
Interactive opening tree from all 36 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Onni Korjus's chess games?
36 games by Onni Korjus, from Aug 2018 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 Onni Korjus has played.
What does Onni Korjus play on the first move as White?
Across 21 games with White in our database, Onni Korjus opens with 1.e4 (86% of games), 1.d4 (10% of games), 1.Nf3 (5% of games). Against 1.e4 as Black, Onni Korjus answers 1...e5 (100% of games). Against 1.d4: 1...Nf6 (88% of games), 1...d5 (13% of games).
What openings does Onni Korjus play as White?
As White, Onni Korjus's most-played openings in our database are: Sicilian: Rossolimo (5 games, 0.0% win rate); Modern Defense (2 games, 50.0% win rate); Ruy Lopez: Morphy Defense (2 games, 100.0% win rate). The full breakdown of 21 games with White is in the table above.
What openings does Onni Korjus play as Black?
As Black, Onni Korjus most often plays: Indian Defense (2 games, 0.0% win rate); Nimzo-Indian: Classical Variation (2 games, 50.0% win rate); English Opening: Reverse Sicilian (1 games, 0.0% win rate). See the table above for the top ten Black openings across 15 games.
What is Onni Korjus's FIDE rating?
Onni Korjus is currently rated 1,990 in classical chess, 1,927 in rapid and 1,943 in blitz. Peak classical rating: 1,990 (Jul 2026).
How many games has Onni Korjus played?
Our database contains 36 games by Onni Korjus, covering Aug 2018 to Jul 2026. Overall record: 11 wins, 7 draws, 18 losses (30.6% win rate).
How do I prepare against Onni Korjus?
36 games by Onni Korjus 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.