Prepare against Jiri Koska
Slovakia · World #23,099 classical · FIDE ID 73620874
Our database contains 182 games by Jiri Koska, covering Sep 2017 to Aug 2026. Below you'll find Jiri Koska's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Jiri Koska 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 | 2,033 | 2,081 | Nov 2024 |
| Rapid | 1,849 | 1,849 | Aug 2026 |
| Blitz | 1,753 | 1,852 | Sep 2023 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 182 | 77 | 47 | 58 | 42.3% |
| As White | 93 | 42 | 24 | 27 | 45.2% |
| As Black | 89 | 35 | 23 | 31 | 39.3% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Jiri Koska's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Jiri Koska's side.
First moves as White (93 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| e4 | 55 | 59.1% | 50.0% |
| Nf3 | 33 | 35.5% | 69.7% |
| c4 | 3 | 3.2% | 100.0% |
| e3 | 1 | 1.1% | 50.0% |
| d4 | 1 | 1.1% | 0.0% |
Main lines as White
- 1.e4 — 59% of White games, 50.0% score
- …e5 (44% of these games) — Koska usually continues Nf3 (58.7% score)
- …c5 (27% of these games) — Koska usually continues Nf3 (25.0% score)
- …e6 (13% of these games) — Koska usually continues d4 (58.3% score)
- 1.Nf3 — 35% of White games, 69.7% score
- …Nf6 (39% of these games) — Koska usually continues g3 (57.7% score)
- …d5 (27% of these games) — Koska usually continues g3 (85.7% score)
- …c5 (15% of these games) — Koska usually continues g3 (50.0% score)
As Black against 1.e4 (55 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| c6 | 27 | 49.1% | 64.8% |
| e6 | 13 | 23.6% | 46.2% |
| e5 | 12 | 21.8% | 54.2% |
| d5 | 2 | 3.6% | 0.0% |
| b6 | 1 | 1.8% | 50.0% |
As Black against 1.d4 (25 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| Nf6 | 17 | 68.0% | 58.8% |
| d5 | 8 | 32.0% | 31.3% |
Jiri Koska's chess games
All 182 games by Jiri Koska in the Chess.ceo database (Sep 2017 - Aug 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: 77 wins, 47 draws, 58 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| A05 | Réti Opening | 14 | 9/3/2 | 64.3% |
| B34 | Sicilian | 9 | 2/2/5 | 22.2% |
| A07 | Réti Opening: Symmetrical Defense | 7 | 4/1/2 | 57.1% |
| A34 | English Opening | 6 | 5/1/0 | 83.3% |
| C55 | Italian Game | 5 | 4/0/1 | 80.0% |
| C07 | French: Tarrasch Variation | 4 | 3/0/1 | 75.0% |
| C55 | Four Knights Game: Italian Variation | 4 | 1/2/1 | 25.0% |
| A04 | English Opening: Symmetrical | 3 | 1/1/1 | 33.3% |
| C54 | Italian Game: Classical Variation | 3 | 2/0/1 | 66.7% |
| C49 | Four Knights Game: Spanish Variation | 3 | 3/0/0 | 100.0% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| A57 | Benoni Defense | 10 | 7/1/2 | 70.0% |
| B12 | Caro-Kann: Advance Variation | 7 | 4/2/1 | 57.1% |
| B13 | Caro-Kann: Exchange Variation | 6 | 4/0/2 | 66.7% |
| B11 | Caro-Kann | 5 | 2/2/1 | 40.0% |
| A31 | Indian Defense | 5 | 1/1/3 | 20.0% |
| B11 | Caro-Kann: Two Knights Variation | 5 | 2/2/1 | 40.0% |
| C00 | French Defense | 5 | 1/2/2 | 20.0% |
| C01 | French: Exchange Variation | 3 | 2/0/1 | 66.7% |
| A15 | English Opening | 3 | 1/1/1 | 33.3% |
| B18 | Caro-Kann: Classical | 3 | 1/2/0 | 33.3% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Jun 2022 | Bogdan Borsos | 2,200 | Liptovsky Jan Open | A46 |
| Jul 2022 | Tomas Zdrazil | 2,122 | 33rd Pardubice Rapid Open | B12 |
| May 2022 | Jozef Trebula | 2,083 | chT1E-SVK 2122 | B18 |
| Jul 2024 | Anej Siraj | 2,063 | Piestany Slovakia Open B | D31 |
| Jul 2022 | Jan Vokoun | 2,056 | 33rd Pardubice Rapid Open | A05 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| ch-SVK U16 | 2023 | 18 | 10 | 1,663 |
| ch-SVK U12 | 2019 | 18 | 9.5 | 1,448 |
| ch-SVK U14 | 2021 | 16 | 7.5 | 1,555 |
| chT2D-SVK 2324 | 2024 | 10 | 7.5 | 2,152 |
| ch-SVK U10 | 2017 | 9 | 4 | 1,005 |
| ch-SVK U18/20 | 2024 | 9 | 5 | 1,940 |
| ch-EU U12 | 2019 | 9 | 2.5 | 1,416 |
| Slovakia Chess Open 2026 | 2026 | 9 | 5.5 | 2,013 |
Interactive opening tree from all 182 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Jiri Koska's chess games?
182 games by Jiri Koska, from Sep 2017 to Aug 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 Koska has played.
What does Jiri Koska play on the first move as White?
Across 93 games with White in our database, Jiri Koska opens with 1.e4 (59% of games), 1.Nf3 (35% of games), 1.c4 (3% of games). Against 1.e4 as Black, Jiri Koska answers 1...c6 (49% of games), 1...e6 (24% of games), 1...e5 (22% of games). Against 1.d4: 1...Nf6 (68% of games), 1...d5 (32% of games).
What openings does Jiri Koska play as White?
As White, Jiri Koska's most-played openings in our database are: Réti Opening (14 games, 64.3% win rate); Sicilian (9 games, 22.2% win rate); Réti Opening: Symmetrical Defense (7 games, 57.1% win rate). The full breakdown of 93 games with White is in the table above.
What openings does Jiri Koska play as Black?
As Black, Jiri Koska most often plays: Benoni Defense (10 games, 70.0% win rate); Caro-Kann: Advance Variation (7 games, 57.1% win rate); Caro-Kann: Exchange Variation (6 games, 66.7% win rate). See the table above for the top ten Black openings across 89 games.
What is Jiri Koska's FIDE rating?
Jiri Koska is currently rated 2,033 in classical chess, 1,849 in rapid and 1,753 in blitz. Peak classical rating: 2,081 (Nov 2024).
How many games has Jiri Koska played?
Our database contains 182 games by Jiri Koska, covering Sep 2017 to Aug 2026. Overall record: 77 wins, 47 draws, 58 losses (42.3% win rate).
How do I prepare against Jiri Koska?
182 games by Jiri Koska 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.