Prepare against Ondrej Vacek
Slovakia · World #14,576 classical · FIDE ID 14904470
Our database contains 304 games by Ondrej Vacek, covering Apr 2003 to Jul 2026. Below you'll find Ondrej Vacek's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Ondrej Vacek 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 | 2,110 | 2,178 | Jul 2008 |
| Rapid | 2,123 | 2,123 | Jul 2026 |
| Blitz | 2,103 | 2,125 | Jul 2019 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 304 | 74 | 164 | 66 | 24.3% |
| As White | 159 | 50 | 84 | 25 | 31.4% |
| As Black | 145 | 24 | 80 | 41 | 16.6% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Ondrej Vacek's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Ondrej Vacek's side.
First moves as White (159 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| Nf3 | 152 | 95.6% | 57.6% |
| e4 | 6 | 3.8% | 75.0% |
| d4 | 1 | 0.6% | 0.0% |
Main lines as White
- 1.Nf3 — 96% of White games, 57.6% score
- …Nf6 (46% of these games) — Vacek usually continues c4 (57.1% score)
- …d5 (28% of these games) — Vacek usually continues d4 (62.2% score)
- …g6 (9% of these games) — Vacek usually continues c4 (57.1% score)
- 1.e4 — 4% of White games, 75.0% score
- …c5 (33% of these games) — Vacek usually continues Nf3 (75.0% score)
- …d5 (17% of these games) — Vacek usually continues exd5 (100.0% score)
- …e5 (17% of these games) — Vacek usually continues Nf3 (50.0% score)
As Black against 1.e4 (72 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| c6 | 34 | 47.2% | 45.6% |
| d5 | 27 | 37.5% | 31.5% |
| e5 | 4 | 5.6% | 37.5% |
| g6 | 2 | 2.8% | 75.0% |
| c5 | 2 | 2.8% | 25.0% |
| d6 | 2 | 2.8% | 75.0% |
As Black against 1.d4 (50 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| d5 | 37 | 74.0% | 45.9% |
| Nf6 | 7 | 14.0% | 50.0% |
| e6 | 4 | 8.0% | 75.0% |
| g6 | 1 | 2.0% | 0.0% |
| d6 | 1 | 2.0% | 50.0% |
Ondrej Vacek's chess games
All 304 games by Ondrej Vacek 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: 74 wins, 164 draws, 66 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| E97 | King's Indian Defense: Orthodox Variation | 29 | 8/15/6 | 27.6% |
| B38 | English Opening | 29 | 10/15/4 | 34.5% |
| E09 | Catalan | 26 | 10/12/4 | 38.5% |
| D13 | Slav Defense | 17 | 4/11/2 | 23.5% |
| B38 | English Opening: Symmetrical | 15 | 5/9/1 | 33.3% |
| A10 | Dutch Defense | 7 | 2/2/3 | 28.6% |
| E91 | Modern Defense | 7 | 3/3/1 | 42.9% |
| D02 | Queen's Pawn Game | 5 | 2/3/0 | 40.0% |
| A55 | Old Indian | 4 | 1/3/0 | 25.0% |
| A30 | Queen's Indian Defense | 3 | 1/1/1 | 33.3% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| B01 | Scandinavian Defense: Main Line | 25 | 0/15/10 | 0.0% |
| D17 | Slav Defense | 24 | 4/14/6 | 16.7% |
| B12 | Caro-Kann: Advance Variation | 12 | 5/3/4 | 41.7% |
| B13 | Caro-Kann: Exchange Variation | 9 | 1/6/2 | 11.1% |
| D11 | Queen's Pawn Game | 8 | 2/4/2 | 25.0% |
| B19 | Caro-Kann: Classical | 6 | 0/4/2 | 0.0% |
| A29 | English Opening: Reverse Sicilian | 6 | 1/3/2 | 16.7% |
| B10 | Caro-Kann | 6 | 1/4/1 | 16.7% |
| A11 | English Opening: Slav Setup | 5 | 0/4/1 | 0.0% |
| B11 | Caro-Kann: Two Knights Variation | 4 | 0/3/1 | 0.0% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Feb 2009 | Rastislav Briestensky | 2,383 | chT-SVK 2C 0809 | A30 |
| Oct 2023 | Matej Hrabusa | 2,346 | chT-SVK 1E 2223 | A84 |
| Jun 2004 | Peter Demeter | 2,297 | ch-SVK | B36 |
| Jul 2007 | Stefan Turna | 2,278 | ch-SVK Open A | E97 |
| Jun 2004 | Sztyepan Sztercsco | 2,230 | ch-SVK | B85 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| Brezova Open | 2010 | 18 | 9.5 | 2,028 |
| ch-SVK Open A | 2011 | 17 | 7 | 2,190 |
| chT-SVK 1E 2223 | 2024 | 17 | 6.5 | 2,047 |
| chT-SVK 2C 0809 | 2009 | 11 | 6.5 | 2,226 |
| chT2C-SVK 1213 | 2013 | 11 | 7 | 2,188 |
| chT-SVK 2C 0910 | 2010 | 11 | 5.5 | 2,130 |
| chT-SVK 2C 0607 | 2007 | 11 | 6 | 2,239 |
| chT-SVK 2C 1314 | 2014 | 11 | 4 | 2,113 |
Interactive opening tree from all 304 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Ondrej Vacek's chess games?
304 games by Ondrej Vacek, 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 Ondrej Vacek has played.
What does Ondrej Vacek play on the first move as White?
Across 159 games with White in our database, Ondrej Vacek opens with 1.Nf3 (96% of games), 1.e4 (4% of games), 1.d4 (1% of games). Against 1.e4 as Black, Ondrej Vacek answers 1...c6 (47% of games), 1...d5 (38% of games), 1...e5 (6% of games). Against 1.d4: 1...d5 (74% of games), 1...Nf6 (14% of games), 1...e6 (8% of games).
What openings does Ondrej Vacek play as White?
As White, Ondrej Vacek's most-played openings in our database are: King's Indian Defense: Orthodox Variation (29 games, 27.6% win rate); English Opening (29 games, 34.5% win rate); Catalan (26 games, 38.5% win rate). The full breakdown of 159 games with White is in the table above.
What openings does Ondrej Vacek play as Black?
As Black, Ondrej Vacek most often plays: Scandinavian Defense: Main Line (25 games, 0.0% win rate); Slav Defense (24 games, 16.7% win rate); Caro-Kann: Advance Variation (12 games, 41.7% win rate). See the table above for the top ten Black openings across 145 games.
What is Ondrej Vacek's FIDE rating?
Ondrej Vacek is currently rated 2,110 in classical chess, 2,123 in rapid and 2,103 in blitz. Peak classical rating: 2,178 (Jul 2008).
How many games has Ondrej Vacek played?
Our database contains 304 games by Ondrej Vacek, covering Apr 2003 to Jul 2026. Overall record: 74 wins, 164 draws, 66 losses (24.3% win rate).
How do I prepare against Ondrej Vacek?
304 games by Ondrej Vacek 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.