Prepare against Calvin John Klaasen
FM · ZAF · World #9,567 classical · FIDE ID 14300133
Our database contains 372 games by Calvin John Klaasen, covering Jan 2007 to Aug 2026. Below you'll find Calvin John Klaasen's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Calvin John Klaasen 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 | 2,177 | 2,320 | Mar 2018 |
| Rapid | 2,167 | 2,282 | Dec 2018 |
| Blitz | 2,270 | 2,282 | Dec 2018 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 372 | 134 | 133 | 105 | 36.0% |
| As White | 193 | 76 | 70 | 47 | 39.4% |
| As Black | 179 | 58 | 63 | 58 | 32.4% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Calvin John Klaasen's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Calvin John Klaasen's side.
First moves as White (193 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| d4 | 95 | 49.2% | 52.6% |
| e4 | 76 | 39.4% | 61.2% |
| Nf3 | 13 | 6.7% | 73.1% |
| c4 | 9 | 4.7% | 55.6% |
Main lines as White
- 1.d4 — 49% of White games, 52.6% score
- …Nf6 (66% of these games) — Klaasen usually continues c4 (48.2% score)
- …d5 (23% of these games) — Klaasen usually continues c4 (55.6% score)
- …e6 (4% of these games) — Klaasen usually continues e4 (75.0% score)
- 1.e4 — 39% of White games, 61.2% score
- …c5 (53% of these games) — Klaasen usually continues Nf3 (52.9% score)
- …e5 (26% of these games) — Klaasen usually continues Nf3 (71.1% score)
- …c6 (5% of these games) — Klaasen usually continues d4 (37.5% score)
As Black against 1.e4 (76 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| c5 | 53 | 69.7% | 54.7% |
| e5 | 16 | 21.1% | 34.4% |
| c6 | 3 | 3.9% | 16.7% |
| d6 | 2 | 2.6% | 100.0% |
| e6 | 1 | 1.3% | 50.0% |
As Black against 1.d4 (70 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| Nf6 | 59 | 84.3% | 52.5% |
| d5 | 8 | 11.4% | 62.5% |
| d6 | 2 | 2.9% | 50.0% |
| g6 | 1 | 1.4% | 50.0% |
Calvin John Klaasen's chess games
All 372 games by Calvin John Klaasen in the Chess.ceo database (Jan 2007 - 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: 134 wins, 133 draws, 105 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| D11 | Slav Defense | 14 | 6/7/1 | 42.9% |
| E05 | Catalan | 14 | 6/5/3 | 42.9% |
| B42 | Sicilian | 14 | 5/4/5 | 35.7% |
| B92 | Sicilian: Najdorf | 12 | 5/2/5 | 41.7% |
| A55 | Indian Defense | 11 | 2/7/2 | 18.2% |
| E94 | King's Indian Defense: Orthodox Variation | 9 | 3/5/1 | 33.3% |
| A31 | English Opening | 8 | 3/2/3 | 37.5% |
| A31 | Benoni Defense | 7 | 4/3/0 | 57.1% |
| D90 | Grünfeld Defense | 7 | 2/4/1 | 28.6% |
| B23 | Sicilian: Closed | 5 | 4/1/0 | 80.0% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| B22 | Sicilian | 19 | 8/7/4 | 42.1% |
| E15 | Queen's Indian Defense | 14 | 4/5/5 | 28.6% |
| D02 | Indian Defense | 13 | 5/4/4 | 38.5% |
| B36 | Sicilian: Accelerated Dragon | 10 | 3/5/2 | 30.0% |
| A37 | English Opening: Symmetrical | 8 | 3/4/1 | 37.5% |
| A04 | Réti Opening | 7 | 0/3/4 | 0.0% |
| E11 | Catalan | 7 | 3/1/3 | 42.9% |
| E43 | Nimzo-Indian: Rubinstein System | 7 | 3/4/0 | 42.9% |
| B23 | Sicilian: Closed | 6 | 4/1/1 | 66.7% |
| B90 | Sicilian: Najdorf | 5 | 0/3/2 | 0.0% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Dec 2014 | Ahmed Adly | 2,591 | ch-Africa | B96 |
| Oct 2018 | Batuhan Muhammed Dastan | 2,569 | Olympiad-43 | A85 |
| Sep 2018 | Petr Kostenko | 2,459 | Olympiad-43 | E01 |
| Dec 2024 | Aaditya Dhingra | 2,448 | Titled Tue Early | A10 |
| Jan 2022 | Gupta Prithu | 2,444 | Titled Tue | D34 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| ch-RSA | 2024 | 59 | 29 | 2,190 |
| Titled Tuesday | 2025 | 33 | 12.5 | 2,102 |
| South African Open | 2022 | 29 | 19 | 2,073 |
| ch-Africa | 2023 | 15 | 7 | 2,250 |
| SA Adult Closed 2026 | Open | 2026 | 11 | 3.5 | 2,068 |
| ch-Commonwealth RSA Open | 2011 | 11 | 7 | 2,352 |
| 45th ch-RSA | 2011 | 11 | 2.5 | 1,982 |
| Pretoria FM A | 2012 | 9 | 6 | 2,277 |
Frequent opponents
Head-to-head records: Watu Kobese (16 games) · Daniel Cawdery (13 games) · Daniel Barrish (11 games)
Interactive opening tree from all 372 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Calvin John Klaasen's chess games?
372 games by Calvin John Klaasen, from Jan 2007 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 Calvin John Klaasen has played.
What does Calvin John Klaasen play on the first move as White?
Across 193 games with White in our database, Calvin John Klaasen opens with 1.d4 (49% of games), 1.e4 (39% of games), 1.Nf3 (7% of games). Against 1.e4 as Black, Calvin John Klaasen answers 1...c5 (70% of games), 1...e5 (21% of games), 1...c6 (4% of games). Against 1.d4: 1...Nf6 (84% of games), 1...d5 (11% of games), 1...d6 (3% of games).
What openings does Calvin John Klaasen play as White?
As White, Calvin John Klaasen's most-played openings in our database are: Slav Defense (14 games, 42.9% win rate); Catalan (14 games, 42.9% win rate); Sicilian (14 games, 35.7% win rate). The full breakdown of 193 games with White is in the table above.
What openings does Calvin John Klaasen play as Black?
As Black, Calvin John Klaasen most often plays: Sicilian (19 games, 42.1% win rate); Queen's Indian Defense (14 games, 28.6% win rate); Indian Defense (13 games, 38.5% win rate). See the table above for the top ten Black openings across 179 games.
What is Calvin John Klaasen's FIDE rating?
Calvin John Klaasen is currently rated 2,177 in classical chess, 2,167 in rapid and 2,270 in blitz. Peak classical rating: 2,320 (Mar 2018).
How many games has Calvin John Klaasen played?
Our database contains 372 games by Calvin John Klaasen, covering Jan 2007 to Aug 2026. Overall record: 134 wins, 133 draws, 105 losses (36.0% win rate).
How do I prepare against Calvin John Klaasen?
372 games by Calvin John Klaasen 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.