Prepare against Jan Mejzr
Czechia · World #37,774 classical · FIDE ID 342998
Our database contains 117 games by Jan Mejzr, covering Jul 2009 to Jul 2026. Below you'll find Jan Mejzr's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Jan Mejzr 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 | 1,945 | 1,954 | Nov 2024 |
| Rapid | 1,859 | 1,876 | Sep 2025 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 117 | 56 | 22 | 39 | 47.9% |
| As White | 56 | 31 | 7 | 18 | 55.4% |
| As Black | 61 | 25 | 15 | 21 | 41.0% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Jan Mejzr's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Jan Mejzr's side.
First moves as White (56 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| e4 | 47 | 83.9% | 58.5% |
| b4 | 4 | 7.1% | 75.0% |
| d4 | 4 | 7.1% | 75.0% |
| c4 | 1 | 1.8% | 100.0% |
Main lines as White
- 1.e4 — 84% of White games, 58.5% score
- …c5 (34% of these games) — Mejzr usually continues Nf3 (31.3% score)
- …e5 (23% of these games) — Mejzr usually continues Nf3 (70.0% score)
- …e6 (15% of these games) — Mejzr usually continues d4 (21.4% score)
- 1.b4 — 7% of White games, 75.0% score
- …e5 (75% of these games) — Mejzr usually continues a3 (100.0% score)
- …Nf6 (25% of these games) — Mejzr usually continues Nf3 (0.0% score)
As Black against 1.e4 (32 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| c5 | 20 | 62.5% | 55.0% |
| e5 | 6 | 18.8% | 50.0% |
| d6 | 3 | 9.4% | 66.7% |
| c6 | 2 | 6.3% | 25.0% |
| d5 | 1 | 3.1% | 100.0% |
As Black against 1.d4 (12 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| Nf6 | 9 | 75.0% | 44.4% |
| d5 | 1 | 8.3% | 100.0% |
| f5 | 1 | 8.3% | 0.0% |
| c5 | 1 | 8.3% | 0.0% |
Jan Mejzr's chess games
All 117 games by Jan Mejzr in the Chess.ceo database (Jul 2009 - 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: 56 wins, 22 draws, 39 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| B53 | Sicilian | 7 | 2/1/4 | 28.6% |
| C45 | Scotch Game | 6 | 3/2/1 | 50.0% |
| B23 | Sicilian: Closed | 4 | 2/1/1 | 50.0% |
| C07 | French: Tarrasch Variation | 4 | 1/0/3 | 25.0% |
| B21 | Sicilian: Smith-Morra Gambit | 3 | 2/1/0 | 66.7% |
| A00 | Orangutan opening | 3 | 3/0/0 | 100.0% |
| C01 | French: Exchange Variation | 3 | 0/1/2 | 0.0% |
| B09 | Pirc Defense | 3 | 3/0/0 | 100.0% |
| B12 | Caro-Kann: Advance Variation | 2 | 2/0/0 | 100.0% |
| C41 | Philidor | 2 | 1/0/1 | 50.0% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| B42 | Sicilian | 12 | 5/3/4 | 41.7% |
| A05 | Réti Opening | 4 | 1/2/1 | 25.0% |
| A16 | English Opening | 4 | 1/0/3 | 25.0% |
| B07 | Pirc Defense | 3 | 2/0/1 | 66.7% |
| D87 | Grünfeld Defense | 3 | 0/3/0 | 0.0% |
| B21 | Sicilian: Smith-Morra Gambit | 3 | 0/1/2 | 0.0% |
| A57 | Benoni Defense | 3 | 2/0/1 | 66.7% |
| A30 | English Opening: Symmetrical | 3 | 3/0/0 | 100.0% |
| B23 | Sicilian: Closed | 2 | 2/0/0 | 100.0% |
| A05 | Réti Opening: Spassky Variation | 2 | 1/1/0 | 50.0% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Aug 2010 | Jindrich Janicek | 2,063 | Ricany Open | A33 |
| Aug 2009 | Milan Petras | 2,056 | Ricany Open | B09 |
| Aug 2010 | Radek Vevera | 2,044 | Ricany Open | B42 |
| Aug 2010 | Ondrej Matejovsky | 2,037 | Ricany Open | B02 |
| Apr 2014 | Miroslav Benes | 2,020 | Ostrava Konik Open | E91 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| Ricany Open | 2020 | 24 | 11 | 1,907 |
| Prague Holiday K11 | 2017 | 14 | 8 | 1,937 |
| 24th Klatovy Open B | 2018 | 9 | 6 | 1,791 |
| 23rd Klatovy Open B | 2017 | 9 | 6.5 | 1,875 |
| Ostrava Konik Open | 2014 | 9 | 5 | 1,737 |
| 22nd Klatovy Open B | 2016 | 9 | 7 | 1,915 |
| 6th Teplice Open | 2011 | 9 | 4 | 1,758 |
| 29th Klatovy Open B | 2023 | 9 | 6.5 | 1,710 |
Interactive opening tree from all 117 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Jan Mejzr's chess games?
117 games by Jan Mejzr, from Jul 2009 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 Jan Mejzr has played.
What does Jan Mejzr play on the first move as White?
Across 56 games with White in our database, Jan Mejzr opens with 1.e4 (84% of games), 1.b4 (7% of games), 1.d4 (7% of games). Against 1.e4 as Black, Jan Mejzr answers 1...c5 (63% of games), 1...e5 (19% of games), 1...d6 (9% of games). Against 1.d4: 1...Nf6 (75% of games), 1...d5 (8% of games), 1...f5 (8% of games).
What openings does Jan Mejzr play as White?
As White, Jan Mejzr's most-played openings in our database are: Sicilian (7 games, 28.6% win rate); Scotch Game (6 games, 50.0% win rate); Sicilian: Closed (4 games, 50.0% win rate). The full breakdown of 56 games with White is in the table above.
What openings does Jan Mejzr play as Black?
As Black, Jan Mejzr most often plays: Sicilian (12 games, 41.7% win rate); Réti Opening (4 games, 25.0% win rate); English Opening (4 games, 25.0% win rate). See the table above for the top ten Black openings across 61 games.
What is Jan Mejzr's FIDE rating?
Jan Mejzr is currently rated 1,945 in classical chess, 1,859 in rapid. Peak classical rating: 1,954 (Nov 2024).
How many games has Jan Mejzr played?
Our database contains 117 games by Jan Mejzr, covering Jul 2009 to Jul 2026. Overall record: 56 wins, 22 draws, 39 losses (47.9% win rate).
How do I prepare against Jan Mejzr?
117 games by Jan Mejzr 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.