Jiri Koska
SVK · FIDE ID 73620874 · 72 tournament games since 2022
Standard
1984
#481 in SVK (active)
Rapid
1875
#670 in SVK (active)
Blitz
1753
#769 in SVK (active)
Score
53%
29 W · 19 D · 24 L
Opp. avg
1888
Last 50 games
Last game
2026-07-17
exe: Slovakia chess open # Piešťany 2026
Prep summary
- As White: 1.Nf3 in 67% of games (scores 52%).
- Against 1.e4: 1...e6 in 9 of 16 games (French Defense), scoring 67%.
- Against 1.d4: 1...Nf6 in 14 of 14 games (Indian Defense), scoring 46%.
- Weak spot: Rapport-Jobava System as Black, only 17% in 3 games.
- Comfort zone: Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense as Black, 100% in 3 games.
- By opponent strength: 32% against higher-rated players, 78% against lower-rated.
Based on 72 over-the-board games (8 rapid · 2 blitz). 36 with White (54%), 36 with Black (53%).
Openings as White
First move
| 1.Nf3 | 24 | 52% |
| 1.e4 | 5 | 30% |
| 1.c4 | 3 | 100% |
| 1.d4 | 3 | 50% |
Most played
| Opening | Games | Score |
|---|---|---|
| Zukertort Opening: Sicilian Invitation | 4 | 38% |
| King's Indian Attack | 2 | 100% |
| English Opening: Symmetrical Variation, Fianchetto Variation | 2 | 100% |
| Nimzo-Larsen Attack: Classical Variation | 2 | 75% |
| King's Indian Attack: Sicilian Variation | 2 | 100% |
Openings as Black
Against 1.e4 (16 games)
| 1...e6 French Defense | 9 | 67% |
| 1...c6 Caro-Kann Defense | 4 | 100% |
| 1...d5 Scandinavian Defense | 1 | 0% |
Against 1.d4 (14 games)
| 1...Nf6 Indian Defense | 14 | 46% |
Most played
| Opening | Games | Score |
|---|---|---|
| Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | 3 | 100% |
| Benko Gambit Accepted: Fully Accepted Variation | 3 | 33% |
| Rapport-Jobava System | 3 | 17% |
| French Defense: Exchange Variation | 2 | 100% |
| King's Indian Defense: Orthodox Variation | 2 | 25% |
Recent games
| Date | Opponent and event | Result |
|---|---|---|
| 2026-07-17 | Jozef Benci (2169) exe: Slovakia chess open # Piešťany 2026 | ½ |
| 2026-07-16 | Miroslav Mandak (1900) exe: Slovakia chess open # Piešťany 2026 | W |
| 2026-07-15 | Petr Janousek (2106) exe: Slovakia chess open # Piešťany 2026 | L |
| 2026-07-14 | Ivan Stanko (1827) exe: Slovakia chess open # Piešťany 2026 | W |
| 2026-07-13 | Chance Timothy Ruggiero (1817) exe: Slovakia chess open # Piešťany 2026 | W |
| 2026-07-12 | Andrej Skyba (1868) exe: Slovakia chess open # Piešťany 2026 | L |
| 2026-07-11 | Michal Jares (2310) exe: Slovakia chess open # Piešťany 2026 | L |
| 2026-07-10 | Klara Lenartova (1602) exe: Slovakia chess open # Piešťany 2026 | W |
| 2026-07-09 | Gorazd Kollarik (1726) exe: Slovakia chess open # Piešťany 2026 | W |
| 2025-07-16 | Jan Bednar (2020) Slovakia Chess Open PIESTANY 2025 | Open B | L |
Data: FIDE rating list (October 2026 list; national ranks count active players) and tournament games broadcast on Lichess since 2020 (open data, CC0). Results are matched to FIDE players by name or FIDE ID and may be incomplete. This page shows public chess results only. Is this you and you want the page removed? Email chessmoose1@gmail.com and we remove it.