Prepare against Bob Jansen
NLD · World #11,597 classical · FIDE ID 1012550
Our database contains 267 games by Bob Jansen, covering Oct 2005 to Jul 2026. Below you'll find Bob Jansen's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Bob Jansen 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 | 2,146 | 2,251 | Aug 2024 |
| Rapid | 2,250 | 2,258 | Mar 2025 |
| Blitz | 2,167 | 2,167 | Jul 2026 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 267 | 111 | 51 | 105 | 41.6% |
| As White | 129 | 60 | 21 | 48 | 46.5% |
| As Black | 138 | 51 | 30 | 57 | 37.0% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Bob Jansen's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Bob Jansen's side.
First moves as White (129 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| d4 | 74 | 57.4% | 46.6% |
| e4 | 53 | 41.1% | 66.0% |
| g3 | 1 | 0.8% | 100.0% |
| d3 | 1 | 0.8% | 0.0% |
Main lines as White
- 1.d4 — 57% of White games, 46.6% score
- …Nf6 (42% of these games) — Jansen usually continues Bg5 (47.4% score)
- …d5 (38% of these games) — Jansen usually continues c4 (66.7% score)
- …g6 (7% of these games) — Jansen usually continues e4 (16.7% score)
- 1.e4 — 41% of White games, 66.0% score
- …e5 (34% of these games) — Jansen usually continues Nf3 (77.8% score)
- …c5 (32% of these games) — Jansen usually continues Nf3 (35.7% score)
- …e6 (11% of these games) — Jansen usually continues d4 (50.0% score)
As Black against 1.e4 (85 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| e6 | 50 | 58.8% | 55.0% |
| e5 | 11 | 12.9% | 31.8% |
| c5 | 11 | 12.9% | 40.9% |
| Nc6 | 7 | 8.2% | 50.0% |
| d6 | 4 | 4.7% | 25.0% |
| Nf6 | 2 | 2.4% | 0.0% |
As Black against 1.d4 (31 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| e6 | 13 | 41.9% | 50.0% |
| Nf6 | 10 | 32.3% | 35.0% |
| d5 | 7 | 22.6% | 35.7% |
| g6 | 1 | 3.2% | 0.0% |
Bob Jansen's chess games
All 267 games by Bob Jansen in the Chess.ceo database (Oct 2005 - 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: 111 wins, 51 draws, 105 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| A45 | Trompowsky Attack | 19 | 7/4/8 | 36.8% |
| D00 | London System | 9 | 3/1/5 | 33.3% |
| D00 | Blackmar-Diemer Gambit | 9 | 5/1/3 | 55.6% |
| B06 | Modern Defense | 7 | 1/3/3 | 14.3% |
| D00 | Queen's Pawn Game: Chigorin Variation | 6 | 2/0/4 | 33.3% |
| A06 | Queen's Pawn Game | 5 | 1/1/3 | 20.0% |
| C02 | French: Advance Variation | 5 | 2/2/1 | 40.0% |
| C50 | Italian Game | 5 | 4/0/1 | 80.0% |
| C66 | Ruy Lopez | 4 | 3/0/1 | 75.0% |
| B07 | Philidor | 4 | 3/1/0 | 75.0% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| C18 | French: Winawer Variation | 22 | 9/8/5 | 40.9% |
| C02 | French: Advance Variation | 9 | 5/0/4 | 55.6% |
| A90 | Horwitz Defense | 9 | 3/3/3 | 33.3% |
| A43 | Benoni Defense | 7 | 1/0/6 | 14.3% |
| C10 | French Defense | 7 | 4/1/2 | 57.1% |
| B22 | Sicilian: Alapin | 6 | 2/1/3 | 33.3% |
| C03 | French: Tarrasch Variation | 6 | 1/2/3 | 16.7% |
| C01 | French: Exchange Variation | 6 | 3/2/1 | 50.0% |
| B01 | Nimzowitsch Defense | 6 | 3/2/1 | 50.0% |
| A10 | English Opening | 4 | 2/2/0 | 50.0% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Jun 2024 | Chiel Van Oosterom | 2,409 | ch-NED Qual Rapid | A80 |
| Aug 2019 | Jan Mikes | 2,386 | 6th Prague Summer Open A | D00 |
| Sep 2022 | Helmut Cardon | 2,381 | chT-NED 2223 | A90 |
| Apr 2019 | Kevin Roser | 2,362 | Karlsruhe Grenke Open | A45 |
| Jun 2024 | Zyon Kollen | 2,341 | ch-NED Qual Rapid | C02 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| Hengelo U20 Open | 2005 | 27 | 18 | 2,227 |
| ch-NED Qual Rapid | 2024 | 11 | 7 | 2,358 |
| Hengelo U12 Open | 1997 | 10 | 5 | – |
| Hengelo U16 Open | 2001 | 9 | 5.5 | – |
| ch-NED U20 | 2003 | 9 | 4 | 2,206 |
| Hengelo U14 Open | 1998 | 9 | 4.5 | – |
| ch-NED U16 Open | 2000 | 9 | 5 | – |
| ch-NED U16 | 2001 | 9 | 4.5 | 2,276 |
Interactive opening tree from all 267 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Bob Jansen's chess games?
267 games by Bob Jansen, from Oct 2005 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 Bob Jansen has played.
What does Bob Jansen play on the first move as White?
Across 129 games with White in our database, Bob Jansen opens with 1.d4 (57% of games), 1.e4 (41% of games), 1.g3 (1% of games). Against 1.e4 as Black, Bob Jansen answers 1...e6 (59% of games), 1...e5 (13% of games), 1...c5 (13% of games). Against 1.d4: 1...e6 (42% of games), 1...Nf6 (32% of games), 1...d5 (23% of games).
What openings does Bob Jansen play as White?
As White, Bob Jansen's most-played openings in our database are: Trompowsky Attack (19 games, 36.8% win rate); London System (9 games, 33.3% win rate); Blackmar-Diemer Gambit (9 games, 55.6% win rate). The full breakdown of 129 games with White is in the table above.
What openings does Bob Jansen play as Black?
As Black, Bob Jansen most often plays: French: Winawer Variation (22 games, 40.9% win rate); French: Advance Variation (9 games, 55.6% win rate); Horwitz Defense (9 games, 33.3% win rate). See the table above for the top ten Black openings across 138 games.
What is Bob Jansen's FIDE rating?
Bob Jansen is currently rated 2,146 in classical chess, 2,250 in rapid and 2,167 in blitz. Peak classical rating: 2,251 (Aug 2024).
How many games has Bob Jansen played?
Our database contains 267 games by Bob Jansen, covering Oct 2005 to Jul 2026. Overall record: 111 wins, 51 draws, 105 losses (41.6% win rate).
How do I prepare against Bob Jansen?
267 games by Bob Jansen 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.