Prepare against Jan Bosma
NLD · World #37,590 classical · FIDE ID 1046837
Our database contains 61 games by Jan Bosma, covering Jun 2016 to Jul 2026. Below you'll find Jan Bosma's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Jan Bosma 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 | 1,946 | 1,966 | Oct 2025 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 61 | 19 | 19 | 23 | 31.1% |
| As White | 30 | 8 | 10 | 12 | 26.7% |
| As Black | 31 | 11 | 9 | 11 | 35.5% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Jan Bosma's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Jan Bosma's side.
First moves as White (30 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| e4 | 18 | 60.0% | 47.2% |
| c4 | 12 | 40.0% | 37.5% |
Main lines as White
- 1.e4 — 60% of White games, 47.2% score
- …c5 (44% of these games) — Bosma usually continues Nc3 (20.0% score)
- …e5 (33% of these games) — Bosma usually continues Nf3 (83.3% score)
- …e6 (11% of these games) — Bosma usually continues d4 (25.0% score)
- 1.c4 — 40% of White games, 37.5% score
- …e5 (58% of these games) — Bosma usually continues Nc3 (25.0% score)
- …Nf6 (42% of these games) — Bosma usually continues Nc3 (37.5% score)
As Black against 1.e4 (23 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| d6 | 14 | 60.9% | 53.6% |
| c5 | 5 | 21.7% | 50.0% |
| Nf6 | 3 | 13.0% | 33.3% |
| e5 | 1 | 4.3% | 0.0% |
As Black against 1.d4 (3 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| d6 | 2 | 66.7% | 25.0% |
| d5 | 1 | 33.3% | 100.0% |
Jan Bosma's chess games
All 61 games by Jan Bosma in the Chess.ceo database (Jun 2016 - 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: 19 wins, 19 draws, 23 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| A29 | English Opening: Reverse Sicilian | 7 | 1/2/4 | 14.3% |
| B25 | Sicilian: Closed | 5 | 0/2/3 | 0.0% |
| A16 | English Opening | 2 | 0/1/1 | 0.0% |
| B07 | Sicilian | 2 | 1/0/1 | 50.0% |
| D94 | Grünfeld Defense | 1 | 0/1/0 | 0.0% |
| D76 | Indian Defense | 1 | 1/0/0 | 100.0% |
| E72 | King's Indian Defense | 1 | 0/1/0 | 0.0% |
| C41 | Philidor | 1 | 1/0/0 | 100.0% |
| B08 | Pirc Defense | 1 | 1/0/0 | 100.0% |
| C60 | Ruy Lopez | 1 | 1/0/0 | 100.0% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| B08 | Pirc Defense | 14 | 5/5/4 | 35.7% |
| B04 | Alekhine Defense | 3 | 1/0/2 | 33.3% |
| B23 | Sicilian: Closed | 2 | 1/0/1 | 50.0% |
| A03 | Bird's opening | 2 | 1/1/0 | 50.0% |
| B33 | Sicilian | 2 | 0/1/1 | 0.0% |
| E61 | Indian Defense | 1 | 0/0/1 | 0.0% |
| D20 | Queen's Gambit Accepted | 1 | 1/0/0 | 100.0% |
| E35 | Queen's Indian Defense | 1 | 1/0/0 | 100.0% |
| D21 | Queen's Pawn Game | 1 | 0/0/1 | 0.0% |
| C86 | Ruy Lopez: Morphy Defense | 1 | 0/0/1 | 0.0% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Apr 2013 | Edwyn Mesman | 1,849 | ch-NED U15 | B08 |
| Apr 2017 | Leendert Hartevelt | 1,777 | ch-NED U18/20 | A29 |
| May 2014 | Cor Kanters | 1,674 | ch-NED U15 | C41 |
| Jun 2011 | Sourav Bhattacharjee | 1,631 | ch-NED U13 | B08 |
| Apr 2017 | Nick Bootsma | 1,528 | ch-NED U18/20 | B04 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| ch-NED U13 | 2012 | 18 | 10 | 1,494 |
| ch-NED U15 | 2014 | 16 | 6.5 | 1,626 |
| ch-NED U16 | 2016 | 9 | 3.5 | 1,570 |
| ch-NED U11 | 2010 | 9 | 5.5 | – |
| ch-NED U18/20 | 2017 | 8 | 3 | 1,892 |
| chT-NED Promotion Liga 2b | 2021 | 1 | 0 | 1,679 |
Interactive opening tree from all 61 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Jan Bosma's chess games?
61 games by Jan Bosma, from Jun 2016 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 Bosma has played.
What does Jan Bosma play on the first move as White?
Across 30 games with White in our database, Jan Bosma opens with 1.e4 (60% of games), 1.c4 (40% of games). Against 1.e4 as Black, Jan Bosma answers 1...d6 (61% of games), 1...c5 (22% of games), 1...Nf6 (13% of games). Against 1.d4: 1...d6 (67% of games), 1...d5 (33% of games).
What openings does Jan Bosma play as White?
As White, Jan Bosma's most-played openings in our database are: English Opening: Reverse Sicilian (7 games, 14.3% win rate); Sicilian: Closed (5 games, 0.0% win rate); English Opening (2 games, 0.0% win rate). The full breakdown of 30 games with White is in the table above.
What openings does Jan Bosma play as Black?
As Black, Jan Bosma most often plays: Pirc Defense (14 games, 35.7% win rate); Alekhine Defense (3 games, 33.3% win rate); Sicilian: Closed (2 games, 50.0% win rate). See the table above for the top ten Black openings across 31 games.
What is Jan Bosma's FIDE rating?
Jan Bosma is currently rated 1,946 in classical chess. Peak classical rating: 1,966 (Oct 2025).
How many games has Jan Bosma played?
Our database contains 61 games by Jan Bosma, covering Jun 2016 to Jul 2026. Overall record: 19 wins, 19 draws, 23 losses (31.1% win rate).
How do I prepare against Jan Bosma?
61 games by Jan Bosma 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.