Prepare against Jan Mrnka
Czechia · World #30,861 classical · FIDE ID 321818
When preparing against Jan Mrnka, expect 1.e4 in 53% of White games. Against 1.e4 the reply is 1...d6 (78% of games); against 1.d4, 1...Nf6 (55%). Lowest win rate among frequent openings: Pirc Defense as Black, 41.9% over 31 games.
Our database contains 112 games by Jan Mrnka, covering Apr 2004 to Jul 2026. Below you'll find Jan Mrnka's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Jan Mrnka 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 | 1,980 | 2,101 | Mar 2010 |
| Rapid | 1,984 | 1,994 | Aug 2025 |
| Blitz | 1,973 | 1,994 | Aug 2025 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 112 | 45 | 39 | 27 | 40.2% |
| As White | 47 | 25 | 12 | 10 | 53.2% |
| As Black | 65 | 20 | 27 | 17 | 30.8% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Jan Mrnka's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Jan Mrnka's side.
First moves as White (47 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| e4 | 25 | 53.2% | 68.0% |
| c4 | 22 | 46.8% | 63.6% |
Main lines as White
- 1.e4 — 53% of White games, 68.0% score
- …e6 (20% of these games) — Mrnka usually continues d4 (75.0% score)
- …e5 (20% of these games) — Mrnka usually continues Bc4 (50.0% score)
- …d6 (20% of these games) — Mrnka usually continues d4 (80.0% score)
- 1.c4 — 47% of White games, 63.6% score
- …Nf6 (50% of these games) — Mrnka usually continues Nc3 (62.5% score)
- …e5 (23% of these games) — Mrnka usually continues Nc3 (80.0% score)
- …e6 (14% of these games) — Mrnka usually continues Nc3 (50.0% score)
As Black against 1.e4 (40 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| d6 | 31 | 77.5% | 56.5% |
| e6 | 9 | 22.5% | 38.9% |
As Black against 1.d4 (11 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| Nf6 | 6 | 54.5% | 75.0% |
| d5 | 3 | 27.3% | 50.0% |
| e6 | 2 | 18.2% | 50.0% |
Jan Mrnka's chess games
All 112 games by Jan Mrnka in the Chess.ceo database (Apr 2004 - 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: 45 wins, 39 draws, 27 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| A26 | English Opening | 7 | 4/2/1 | 57.1% |
| A26 | English Opening: Reverse Sicilian | 5 | 4/0/1 | 80.0% |
| B08 | Pirc Defense | 5 | 3/2/0 | 60.0% |
| C24 | Bishop's Opening | 4 | 1/2/1 | 25.0% |
| B23 | Sicilian: Closed | 3 | 2/0/1 | 66.7% |
| C06 | French: Tarrasch Variation | 3 | 2/0/1 | 66.7% |
| E91 | King's Indian Defense: Orthodox Variation | 3 | 1/1/1 | 33.3% |
| D32 | Queen's Gambit Declined | 3 | 1/1/1 | 33.3% |
| B08 | Modern Defense | 2 | 0/2/0 | 0.0% |
| B02 | Alekhine Defense | 2 | 2/0/0 | 100.0% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| B07 | Pirc Defense | 31 | 13/9/9 | 41.9% |
| A17 | English Opening | 4 | 2/0/2 | 50.0% |
| A07 | Indian Defense | 4 | 0/3/1 | 0.0% |
| D02 | Réti Opening | 3 | 0/2/1 | 0.0% |
| D30 | Slav Defense | 2 | 0/2/0 | 0.0% |
| C02 | French: Advance Variation | 2 | 0/2/0 | 0.0% |
| A03 | Bird's opening | 2 | 0/1/0 | 0.0% |
| C10 | French Defense | 2 | 0/0/2 | 0.0% |
| C18 | French: Winawer Variation | 2 | 1/0/1 | 50.0% |
| A53 | English Opening: Slav Setup | 1 | 1/0/0 | 100.0% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Jan 1996 | Milan Brabec | 2,215 | ch-CZE1 Open | A25 |
| Jan 2006 | Antonin Friml | 2,189 | chT2b-CZE 0506 | B07 |
| Feb 2006 | Zdenek Janda | 2,168 | chT2b-CZE 0506 | B08 |
| Oct 2005 | Richard Sisak | 2,140 | chT2b-CZE 0506 | B08 |
| Feb 2007 | Jachym Kolar | 2,095 | chT2b-CZE 0607 | B02 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| Plzen Open B U18 | 1998 | 18 | 12.5 | 1,865 |
| chT2b-CZE 0506 | 2006 | 11 | 7 | 2,202 |
| Plzen KB Open B U18 | 1997 | 9 | 6.5 | 1,907 |
| ch-CZE U18 | 1996 | 9 | 4 | 1,811 |
| 9th Plzen Open C | 2003 | 9 | 6.5 | 2,005 |
| chT2B-CZE 1112 | 2012 | 9 | 4.5 | 2,009 |
| ch-CZE1 Open | 1996 | 8 | 5 | 2,347 |
| chT2b-CZE 0607 | 2007 | 8 | 3 | 2,036 |
Interactive opening tree from all 112 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Jan Mrnka's chess games?
112 games by Jan Mrnka, from Apr 2004 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 Mrnka has played.
What does Jan Mrnka play on the first move as White?
Across 47 games with White in our database, Jan Mrnka opens with 1.e4 (53% of games), 1.c4 (47% of games). Against 1.e4 as Black, Jan Mrnka answers 1...d6 (78% of games), 1...e6 (23% of games). Against 1.d4: 1...Nf6 (55% of games), 1...d5 (27% of games), 1...e6 (18% of games).
What openings does Jan Mrnka play as White?
As White, Jan Mrnka's most-played openings in our database are: English Opening (7 games, 57.1% win rate); English Opening: Reverse Sicilian (5 games, 80.0% win rate); Pirc Defense (5 games, 60.0% win rate). The full breakdown of 47 games with White is in the table above.
What openings does Jan Mrnka play as Black?
As Black, Jan Mrnka most often plays: Pirc Defense (31 games, 41.9% win rate); English Opening (4 games, 50.0% win rate); Indian Defense (4 games, 0.0% win rate). See the table above for the top ten Black openings across 65 games.
What is Jan Mrnka's FIDE rating?
Jan Mrnka is currently rated 1,980 in classical chess, 1,984 in rapid and 1,973 in blitz. Peak classical rating: 2,101 (Mar 2010).
How many games has Jan Mrnka played?
Our database contains 112 games by Jan Mrnka, covering Apr 2004 to Jul 2026. Overall record: 45 wins, 39 draws, 27 losses (40.2% win rate).
How do I prepare against Jan Mrnka?
112 games by Jan Mrnka 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.