Prepare against Ondrej Maslo
Czechia · World #48,693 classical · FIDE ID 368440
Our database contains 66 games by Ondrej Maslo, covering May 2013 to Jul 2026. Below you'll find Ondrej Maslo's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Ondrej Maslo 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 | 1,898 | 1,914 | Mar 2025 |
| Rapid | 1,852 | 1,852 | Jul 2026 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 66 | 22 | 17 | 27 | 33.3% |
| As White | 34 | 14 | 9 | 11 | 41.2% |
| As Black | 32 | 8 | 8 | 16 | 25.0% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Ondrej Maslo's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Ondrej Maslo's side.
First moves as White (34 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| e4 | 34 | 100.0% | 54.4% |
Main lines as White
- 1.e4 — 100% of White games, 54.4% score
- …c5 (38% of these games) — Maslo usually continues c3 (63.6% score)
- …e5 (24% of these games) — Maslo usually continues Nc3 (100.0% score)
- …e6 (18% of these games) — Maslo usually continues d4 (25.0% score)
As Black against 1.e4 (16 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| c5 | 12 | 75.0% | 25.0% |
| e5 | 4 | 25.0% | 75.0% |
As Black against 1.d4 (12 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| d5 | 7 | 58.3% | 35.7% |
| Nf6 | 3 | 25.0% | 50.0% |
| g6 | 2 | 16.7% | 0.0% |
Ondrej Maslo's chess games
All 66 games by Ondrej Maslo in the Chess.ceo database (May 2013 - 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: 22 wins, 17 draws, 27 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| B22 | Sicilian: Alapin | 11 | 5/4/2 | 45.5% |
| C29 | Vienna Game | 5 | 5/0/0 | 100.0% |
| C05 | French: Tarrasch Variation | 3 | 0/0/3 | 0.0% |
| C24 | Bishop's Opening | 2 | 1/1/0 | 50.0% |
| B22 | French: Exchange Variation | 2 | 1/0/1 | 50.0% |
| B01 | Scandinavian Defense: Main Line | 2 | 0/1/1 | 0.0% |
| B01 | Scandinavian Defense: Modern Variation | 2 | 0/1/1 | 0.0% |
| B22 | Sicilian | 2 | 0/0/2 | 0.0% |
| B15 | Caro-Kann: Main Line | 1 | 0/1/0 | 0.0% |
| B00 | French Defense | 1 | 0/1/0 | 0.0% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| B34 | Sicilian: Accelerated Dragon | 6 | 1/1/4 | 16.7% |
| A34 | Modern Defense | 4 | 1/1/2 | 25.0% |
| D10 | Slav Defense | 3 | 1/0/2 | 33.3% |
| B35 | Sicilian | 3 | 1/1/1 | 33.3% |
| B25 | Sicilian: Closed | 2 | 0/0/2 | 0.0% |
| D02 | Queen's Pawn Game | 2 | 0/1/1 | 0.0% |
| A01 | Nimzovich-Larsen attack | 2 | 0/1/1 | 0.0% |
| C42 | Petrov's Defense | 1 | 1/0/0 | 100.0% |
| B23 | Sicilian: Grand Prix Attack | 1 | 0/0/1 | 0.0% |
| C28 | Bishop's Opening | 1 | 0/0/1 | 0.0% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Aug 2020 | Jaromir Svoboda | 1,977 | Ricany Open | C25 |
| Aug 2016 | Jan Sadil | 1,798 | Ricany Open | C24 |
| Aug 2017 | Rudolf Hampel | 1,772 | Ricany Open A | B22 |
| Sep 2022 | Pavel Zemen | 1,731 | 20th Ricany Open | C42 |
| Sep 2016 | Lukas Hejsek | 1,668 | Ricany Open | B22 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| Ricany Open | 2023 | 27 | 12.5 | 1,747 |
| ch-Mlada Boleslav Region U20 | 2013 | 14 | 8 | 1,556 |
| Ricany Open A | 2017 | 9 | 3.5 | 1,788 |
| 20th Ricany Open | 2022 | 8 | 3.5 | 1,746 |
| ch-CZE U12 | 2009 | 6 | 3 | 1,399 |
| ch-Czech Fed U16 | 2012 | 2 | 0 | 1,304 |
Interactive opening tree from all 66 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Ondrej Maslo's chess games?
66 games by Ondrej Maslo, from May 2013 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 Maslo has played.
What does Ondrej Maslo play on the first move as White?
Across 34 games with White in our database, Ondrej Maslo opens with 1.e4 (100% of games). Against 1.e4 as Black, Ondrej Maslo answers 1...c5 (75% of games), 1...e5 (25% of games). Against 1.d4: 1...d5 (58% of games), 1...Nf6 (25% of games), 1...g6 (17% of games).
What openings does Ondrej Maslo play as White?
As White, Ondrej Maslo's most-played openings in our database are: Sicilian: Alapin (11 games, 45.5% win rate); Vienna Game (5 games, 100.0% win rate); French: Tarrasch Variation (3 games, 0.0% win rate). The full breakdown of 34 games with White is in the table above.
What openings does Ondrej Maslo play as Black?
As Black, Ondrej Maslo most often plays: Sicilian: Accelerated Dragon (6 games, 16.7% win rate); Modern Defense (4 games, 25.0% win rate); Slav Defense (3 games, 33.3% win rate). See the table above for the top ten Black openings across 32 games.
What is Ondrej Maslo's FIDE rating?
Ondrej Maslo is currently rated 1,898 in classical chess, 1,852 in rapid. Peak classical rating: 1,914 (Mar 2025).
How many games has Ondrej Maslo played?
Our database contains 66 games by Ondrej Maslo, covering May 2013 to Jul 2026. Overall record: 22 wins, 17 draws, 27 losses (33.3% win rate).
How do I prepare against Ondrej Maslo?
66 games by Ondrej Maslo 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.