Prepare against Ondrej Sedlacek
Slovakia · World #56,934 classical · FIDE ID 14948478
When preparing against Ondrej Sedlacek, expect 1.d4 in 100% of White games. Against 1.e4 the reply is 1...e6 (58% of games); against 1.d4, 1...d5 (78%).
Our database contains 38 games by Ondrej Sedlacek, covering Jul 2016 to Jul 2026. Below you'll find Ondrej Sedlacek's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Ondrej Sedlacek 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 | 1,867 | 1,897 | Nov 2024 |
| Rapid | 1,887 | 1,887 | Jul 2026 |
| Blitz | 1,870 | 1,870 | Jul 2026 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 38 | 18 | 8 | 12 | 47.4% |
| As White | 14 | 7 | 4 | 3 | 50.0% |
| As Black | 24 | 11 | 4 | 9 | 45.8% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Ondrej Sedlacek's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Ondrej Sedlacek's side.
First moves as White (14 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| d4 | 14 | 100.0% | 64.3% |
Main lines as White
- 1.d4 — 100% of White games, 64.3% score
- …d5 (64% of these games) — Sedlacek usually continues c4 (61.1% score)
- …Nf6 (29% of these games) — Sedlacek usually continues c4 (87.5% score)
- …d6 (7% of these games) — Sedlacek usually continues e4 (0.0% score)
As Black against 1.e4 (12 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| e6 | 7 | 58.3% | 64.3% |
| c5 | 3 | 25.0% | 33.3% |
| d5 | 2 | 16.7% | 75.0% |
As Black against 1.d4 (9 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| d5 | 7 | 77.8% | 64.3% |
| Nf6 | 2 | 22.2% | 50.0% |
Ondrej Sedlacek's chess games
All 38 games by Ondrej Sedlacek in the Chess.ceo database (Jul 2016 - 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: 18 wins, 8 draws, 12 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| D35 | Indian Defense | 3 | 1/2/0 | 33.3% |
| D32 | Queen's Gambit Declined | 2 | 1/0/1 | 50.0% |
| D94 | Grünfeld Defense | 1 | 1/0/0 | 100.0% |
| E91 | King's Indian Defense: Orthodox Variation | 1 | 0/1/0 | 0.0% |
| C41 | Pirc Defense | 1 | 0/0/1 | 0.0% |
| D06 | Queen's Gambit | 1 | 1/0/0 | 100.0% |
| D20 | Queen's Gambit Accepted | 1 | 1/0/0 | 100.0% |
| D11 | Queen's Pawn Game | 1 | 0/1/0 | 0.0% |
| D09 | Albin Countergambit | 1 | 1/0/0 | 100.0% |
| D43 | Semi-Slav Defense | 1 | 0/0/1 | 0.0% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| D05 | Indian Defense | 4 | 3/1/0 | 75.0% |
| D00 | London System | 2 | 1/0/1 | 50.0% |
| A17 | Queen's Gambit Declined | 2 | 1/0/1 | 50.0% |
| C02 | French: Advance Variation | 2 | 1/0/1 | 50.0% |
| C05 | French: Tarrasch Variation | 2 | 1/1/0 | 50.0% |
| D02 | Queen's Pawn Game | 1 | 0/0/1 | 0.0% |
| D00 | Queen's Pawn Game: Chigorin Variation | 1 | 0/0/1 | 0.0% |
| B01 | Scandinavian Defense: Main Line | 1 | 0/1/0 | 0.0% |
| B01 | Scandinavian Defense: Modern Variation | 1 | 1/0/0 | 100.0% |
| B22 | Sicilian | 1 | 0/0/1 | 0.0% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Mar 2018 | Attila Banszegi | 2,034 | chT2B-SVK 1718 | D94 |
| Jan 2019 | Juraj Gunis | 1,982 | chT3B2-SVK 1819 | E61 |
| Oct 2018 | Marek Banic | 1,942 | chT3B2-SVK 1819 | D20 |
| Nov 2017 | Pavol Huliak | 1,930 | chT3B2-SVK 1718 | D55 |
| Nov 2015 | Kristian Chrenko | 1,930 | chT2B-SVK 1516 | B80 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| chT3B2-SVK 2122 | 2022 | 4 | 1 | 1,632 |
| chT3B2-SVK 1819 | 2019 | 4 | 4 | 2,266 |
| chT3B2-SVK 1718 | 2018 | 4 | 2 | 1,820 |
| chT2B-SVK 2324 | 2024 | 4 | 2.5 | 1,749 |
| chT2B-SVK 1819 | 2019 | 4 | 1.5 | 1,681 |
| chT2B-SVK 1718 | 2018 | 4 | 3.5 | 2,136 |
| chT3B2-SVK 1920 | 2020 | 3 | 1.5 | 1,739 |
| chT2B-SVK 1617 | 2017 | 3 | 2.5 | 2,026 |
Interactive opening tree from all 38 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Ondrej Sedlacek's chess games?
38 games by Ondrej Sedlacek, from Jul 2016 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 Ondrej Sedlacek has played.
What does Ondrej Sedlacek play on the first move as White?
Across 14 games with White in our database, Ondrej Sedlacek opens with 1.d4 (100% of games). Against 1.e4 as Black, Ondrej Sedlacek answers 1...e6 (58% of games), 1...c5 (25% of games), 1...d5 (17% of games). Against 1.d4: 1...d5 (78% of games), 1...Nf6 (22% of games).
What openings does Ondrej Sedlacek play as White?
As White, Ondrej Sedlacek's most-played openings in our database are: Indian Defense (3 games, 33.3% win rate); Queen's Gambit Declined (2 games, 50.0% win rate); Grünfeld Defense (1 games, 100.0% win rate). The full breakdown of 14 games with White is in the table above.
What openings does Ondrej Sedlacek play as Black?
As Black, Ondrej Sedlacek most often plays: Indian Defense (4 games, 75.0% win rate); London System (2 games, 50.0% win rate); Queen's Gambit Declined (2 games, 50.0% win rate). See the table above for the top ten Black openings across 24 games.
What is Ondrej Sedlacek's FIDE rating?
Ondrej Sedlacek is currently rated 1,867 in classical chess, 1,887 in rapid and 1,870 in blitz. Peak classical rating: 1,897 (Nov 2024).
How many games has Ondrej Sedlacek played?
Our database contains 38 games by Ondrej Sedlacek, covering Jul 2016 to Jul 2026. Overall record: 18 wins, 8 draws, 12 losses (47.4% win rate).
How do I prepare against Ondrej Sedlacek?
38 games by Ondrej Sedlacek 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.