Prepare against Jan Bosak
Czechia · World #21,929 classical · FIDE ID 314692
Our database contains 233 games by Jan Bosak, covering Apr 2003 to Aug 2026. Below you'll find Jan Bosak's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Jan Bosak 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 | 2,041 | 2,233 | Jan 2004 |
| Rapid | 2,021 | 2,055 | Sep 2025 |
| Blitz | 2,017 | 2,038 | May 2019 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 233 | 73 | 88 | 72 | 31.3% |
| As White | 117 | 41 | 52 | 24 | 35.0% |
| As Black | 116 | 32 | 36 | 48 | 27.6% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Jan Bosak's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Jan Bosak's side.
First moves as White (117 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| c4 | 82 | 70.1% | 59.1% |
| e4 | 21 | 17.9% | 52.4% |
| Nf3 | 13 | 11.1% | 53.8% |
| d4 | 1 | 0.9% | 50.0% |
Main lines as White
- 1.c4 — 70% of White games, 59.1% score
- …Nf6 (30% of these games) — Bosak usually continues Nc3 (66.0% score)
- …e5 (28% of these games) — Bosak usually continues Nc3 (56.5% score)
- …e6 (12% of these games) — Bosak usually continues Nc3 (77.8% score)
- 1.e4 — 18% of White games, 52.4% score
- …c5 (33% of these games) — Bosak usually continues Nf3 (41.7% score)
- …e6 (29% of these games) — Bosak usually continues d4 (50.0% score)
- …e5 (24% of these games) — Bosak usually continues Nf3 (40.0% score)
As Black against 1.e4 (62 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| e6 | 49 | 79.0% | 45.9% |
| e5 | 11 | 17.7% | 45.5% |
| c5 | 2 | 3.2% | 50.0% |
As Black against 1.d4 (35 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| Nf6 | 34 | 97.1% | 35.3% |
| e6 | 1 | 2.9% | 50.0% |
Jan Bosak's chess games
All 233 games by Jan Bosak in the Chess.ceo database (Apr 2003 - 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: 73 wins, 88 draws, 72 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| A28 | English Opening: Reverse Sicilian | 25 | 9/11/5 | 36.0% |
| B38 | English Opening: Symmetrical | 12 | 3/6/3 | 25.0% |
| A16 | English Opening | 12 | 7/5/0 | 58.3% |
| A18 | English Opening: Mikenas Variation | 8 | 5/2/1 | 62.5% |
| E94 | King's Indian Defense: Orthodox Variation | 8 | 4/1/3 | 50.0% |
| D15 | Slav Defense | 7 | 1/4/2 | 14.3% |
| A35 | Modern Defense | 4 | 1/1/2 | 25.0% |
| D37 | Indian Defense | 4 | 1/2/1 | 25.0% |
| B29 | Sicilian | 4 | 0/3/1 | 0.0% |
| C02 | French: Advance Variation | 3 | 1/0/2 | 33.3% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| C03 | French: Tarrasch Variation | 18 | 5/5/8 | 27.8% |
| D85 | Grünfeld Defense | 14 | 4/3/7 | 28.6% |
| C01 | French: Exchange Variation | 9 | 2/4/3 | 22.2% |
| C78 | Ruy Lopez: Morphy Defense | 8 | 4/0/4 | 50.0% |
| A39 | Indian Defense | 7 | 1/1/5 | 14.3% |
| C00 | King's Indian Attack | 6 | 1/3/2 | 16.7% |
| A23 | English Opening: Reverse Sicilian | 6 | 2/4/0 | 33.3% |
| C00 | French Defense | 6 | 2/3/1 | 33.3% |
| C02 | French: Advance Variation | 5 | 3/1/1 | 60.0% |
| C19 | French: Winawer Variation | 5 | 1/1/3 | 20.0% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Jul 2015 | Jan Plachetka | 2,401 | ch-SVK Open | C78 |
| Jul 2020 | Tomas Vojta | 2,349 | 45th Vsetin Open | A27 |
| Sep 2019 | Vladimir Vojtek | 2,312 | Tatry Open | A40 |
| Feb 2022 | Frantisek Vrana | 2,239 | chT1E-CZE 2122 | A88 |
| Mar 2005 | Roman Brazdil | 2,217 | chT2e-CZE 0405 | C19 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| Valasska Bystrice Open | 2023 | 17 | 11 | 2,058 |
| Stare Mesto Open | 2025 | 13 | 6 | 2,012 |
| ch-CSR U18 | 1979 | 11 | 5 | – |
| chT2e-CZE 0506 | 2006 | 11 | 2.5 | 2,013 |
| chT2e-CZE 0405 | 2005 | 11 | 9.5 | 2,366 |
| chT2E-CZE 1617 | 2017 | 11 | 5.5 | 2,137 |
| chT2M-MOR 0203 | 2003 | 11 | 7 | 2,211 |
| chT2E-CZE 1718 | 2018 | 11 | 3 | 1,964 |
Interactive opening tree from all 233 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Jan Bosak's chess games?
233 games by Jan Bosak, from Apr 2003 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 Jan Bosak has played.
What does Jan Bosak play on the first move as White?
Across 117 games with White in our database, Jan Bosak opens with 1.c4 (70% of games), 1.e4 (18% of games), 1.Nf3 (11% of games). Against 1.e4 as Black, Jan Bosak answers 1...e6 (79% of games), 1...e5 (18% of games), 1...c5 (3% of games). Against 1.d4: 1...Nf6 (97% of games), 1...e6 (3% of games).
What openings does Jan Bosak play as White?
As White, Jan Bosak's most-played openings in our database are: English Opening: Reverse Sicilian (25 games, 36.0% win rate); English Opening: Symmetrical (12 games, 25.0% win rate); English Opening (12 games, 58.3% win rate). The full breakdown of 117 games with White is in the table above.
What openings does Jan Bosak play as Black?
As Black, Jan Bosak most often plays: French: Tarrasch Variation (18 games, 27.8% win rate); Grünfeld Defense (14 games, 28.6% win rate); French: Exchange Variation (9 games, 22.2% win rate). See the table above for the top ten Black openings across 116 games.
What is Jan Bosak's FIDE rating?
Jan Bosak is currently rated 2,041 in classical chess, 2,021 in rapid and 2,017 in blitz. Peak classical rating: 2,233 (Jan 2004).
How many games has Jan Bosak played?
Our database contains 233 games by Jan Bosak, covering Apr 2003 to Aug 2026. Overall record: 73 wins, 88 draws, 72 losses (31.3% win rate).
How do I prepare against Jan Bosak?
233 games by Jan Bosak 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.