Prepare against Jiri Kosek
Czechia · World #32,760 classical · FIDE ID 312746
Our database contains 230 games by Jiri Kosek, covering Apr 2003 to Jul 2026. Below you'll find Jiri Kosek's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Jiri Kosek 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 | 1,970 | 2,133 | Jul 2013 |
| Rapid | 2,100 | 2,130 | Sep 2016 |
| Blitz | 1,956 | 2,009 | Sep 2023 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 230 | 48 | 116 | 66 | 20.9% |
| As White | 121 | 22 | 59 | 40 | 18.2% |
| As Black | 109 | 26 | 57 | 26 | 23.9% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Jiri Kosek's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Jiri Kosek's side.
First moves as White (121 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| c4 | 65 | 53.7% | 50.0% |
| d4 | 50 | 41.3% | 34.0% |
| e4 | 5 | 4.1% | 40.0% |
| Nf3 | 1 | 0.8% | 0.0% |
Main lines as White
- 1.c4 — 54% of White games, 50.0% score
- …e5 (34% of these games) — Kosek usually continues Nc3 (43.2% score)
- …Nf6 (28% of these games) — Kosek usually continues Nc3 (66.7% score)
- …e6 (11% of these games) — Kosek usually continues Nc3 (50.0% score)
- 1.d4 — 41% of White games, 34.0% score
- …Nf6 (54% of these games) — Kosek usually continues Nf3 (30.0% score)
- …d5 (30% of these games) — Kosek usually continues Nf3 (45.0% score)
- …e6 (6% of these games) — Kosek usually continues c4 (50.0% score)
As Black against 1.e4 (54 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| c5 | 37 | 68.5% | 48.6% |
| c6 | 9 | 16.7% | 55.6% |
| d6 | 6 | 11.1% | 50.0% |
| e5 | 2 | 3.7% | 25.0% |
As Black against 1.d4 (36 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| d5 | 25 | 69.4% | 54.0% |
| Nf6 | 11 | 30.6% | 50.0% |
Jiri Kosek's chess games
All 230 games by Jiri Kosek 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: 48 wins, 116 draws, 66 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| A25 | English Opening: Reverse Sicilian | 24 | 7/8/9 | 29.2% |
| E72 | English Opening | 19 | 5/8/6 | 26.3% |
| D45 | Slav Defense | 17 | 2/11/4 | 11.8% |
| D37 | Indian Defense | 7 | 1/4/2 | 14.3% |
| E67 | King's Indian Defense | 7 | 3/3/1 | 42.9% |
| A39 | King's Indian Defense: Fianchetto Variation | 7 | 0/4/3 | 0.0% |
| A18 | English Opening: Mikenas Variation | 4 | 1/3/0 | 25.0% |
| D85 | Grünfeld Defense | 4 | 0/2/2 | 0.0% |
| A36 | English Opening: Symmetrical | 4 | 1/1/2 | 25.0% |
| A21 | Modern Defense | 4 | 0/3/1 | 0.0% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| B84 | Sicilian: Najdorf | 15 | 5/8/2 | 33.3% |
| D44 | Slav Defense | 9 | 2/4/3 | 22.2% |
| A48 | Indian Defense | 8 | 2/4/2 | 25.0% |
| B50 | Sicilian | 7 | 2/1/4 | 28.6% |
| B08 | Pirc Defense | 6 | 2/2/2 | 33.3% |
| B52 | Sicilian: Moscow Variation | 6 | 0/3/3 | 0.0% |
| B23 | Sicilian: Closed | 4 | 1/2/1 | 25.0% |
| A34 | English Opening | 4 | 1/2/1 | 25.0% |
| B12 | Caro-Kann: Advance Variation | 3 | 1/2/0 | 33.3% |
| B11 | Caro-Kann: Two Knights Variation | 3 | 1/2/0 | 33.3% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Jan 1992 | Jurij Chachalev | 2,300 | Karvina Open | A22 |
| Jul 2012 | Jaroslav Fiala | 2,237 | chT-CZE rap | E72 |
| Dec 2010 | Jan Hlas | 2,233 | chT2D-CZE 1011 | D64 |
| Mar 2019 | Alexander Tikovsky | 2,180 | chT2D-CZE 1819 | A48 |
| Oct 2009 | Roman Pilch | 2,170 | chT1E-CZE 0910 | E65 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| chT2D-CZE 2122 | 2022 | 11 | 3.5 | 1,910 |
| chT2D-CZE 1819 | 2019 | 11 | 7 | 2,162 |
| chT1b-CZE 9697 | 1997 | 11 | 5.5 | 2,160 |
| chT2D-CZE 1213 | 2013 | 11 | 6.5 | 2,159 |
| chT-CZE 2D 1415 | 2015 | 11 | 4.5 | 1,945 |
| chT-CZE 2D 1718 | 2018 | 11 | 5 | 2,083 |
| chT2D-CZE 1920 | 2020 | 11 | 5 | 2,041 |
| chT2D-CZE 1314 | 2014 | 11 | 4.5 | 2,074 |
Interactive opening tree from all 230 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Jiri Kosek's chess games?
230 games by Jiri Kosek, 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 Jiri Kosek has played.
What does Jiri Kosek play on the first move as White?
Across 121 games with White in our database, Jiri Kosek opens with 1.c4 (54% of games), 1.d4 (41% of games), 1.e4 (4% of games). Against 1.e4 as Black, Jiri Kosek answers 1...c5 (69% of games), 1...c6 (17% of games), 1...d6 (11% of games). Against 1.d4: 1...d5 (69% of games), 1...Nf6 (31% of games).
What openings does Jiri Kosek play as White?
As White, Jiri Kosek's most-played openings in our database are: English Opening: Reverse Sicilian (24 games, 29.2% win rate); English Opening (19 games, 26.3% win rate); Slav Defense (17 games, 11.8% win rate). The full breakdown of 121 games with White is in the table above.
What openings does Jiri Kosek play as Black?
As Black, Jiri Kosek most often plays: Sicilian: Najdorf (15 games, 33.3% win rate); Slav Defense (9 games, 22.2% win rate); Indian Defense (8 games, 25.0% win rate). See the table above for the top ten Black openings across 109 games.
What is Jiri Kosek's FIDE rating?
Jiri Kosek is currently rated 1,970 in classical chess, 2,100 in rapid and 1,956 in blitz. Peak classical rating: 2,133 (Jul 2013).
How many games has Jiri Kosek played?
Our database contains 230 games by Jiri Kosek, covering Apr 2003 to Jul 2026. Overall record: 48 wins, 116 draws, 66 losses (20.9% win rate).
How do I prepare against Jiri Kosek?
230 games by Jiri Kosek 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.