Calvin John Klaasen

Country

RSA

Birth Year

1987

Gender

M

Title

FT,FIDE Master

FIDE ID

14300133

FIDE ratings

2177

Classical

Published FIDE

2167

Rapid

Published FIDE

2270

Blitz

Published FIDE

Official classical ranks

World rank
#9524
National rank · RSA
#19

Active players · Oct 2026 FIDE list ⓘ

Rating history

Highest recorded rating
2320 Jan 2018
Recorded years
2007–2026
Archived games
253

Based on available monthly lists and saved games.

FIDE rating history

Published rating lists through Oct 2026.

View rating lists
Available Games

Published games available in our archive; coverage varies by tournament. Archive last checked: 2026-10-06 (UTC).

# Date Event Site Round White Black Result Moves View
1 2025-07-29 Titled Tue 29th Jul Late chess.com INT 9 Calvin John Klaasen Stepan Papacek 1/2-1/2 39 Open
2 2025-07-29 Titled Tue 29th Jul Late chess.com INT 8 Gisela Roque Sola Calvin John Klaasen 0-1 25 Open
3 2025-07-29 Titled Tue 29th Jul Late chess.com INT 7 Calvin John Klaasen Casper Liu 0-1 52 Open
4 2025-07-29 Titled Tue 29th Jul Late chess.com INT 6 Jaan Ehlvest Calvin John Klaasen 1-0 28 Open
5 2025-07-29 Titled Tue 29th Jul Late chess.com INT 5 Calvin John Klaasen Marcel Winkels 0-1 33 Open
6 2025-07-29 Titled Tue 29th Jul Late chess.com INT 4 Rudolf Jun Calvin John Klaasen 1-0 35 Open
7 2025-07-29 Titled Tue 29th Jul Late chess.com INT 3 Calvin John Klaasen Sandi Stojanovski 0-1 38 Open
8 2025-07-29 Titled Tue 29th Jul Late chess.com INT 2 Esteban Horacio Deichmann Calvin John Klaasen 1-0 38 Open
9 2025-07-29 Titled Tue 29th Jul Late chess.com INT 1 Alexandr E. Volodin Calvin John Klaasen 1-0 37 Open
10 2025-07-29 Titled Tue 29th Jul Late chess.com INT 11 Eleni Pica Calvin John Klaasen 0-1 18 Open
11 2025-07-29 Titled Tue 29th Jul Late chess.com INT 10 Calvin John Klaasen Korun Gulamirian 1-0 39 Open
12 2025-04-21 Cape Gambit Inv 2025 Cape Town RSA 7.2 Calvin John Klaasen Mohamed Ozayr Bhawoodien 1-0 35 Open
13 2025-04-20 Cape Gambit Inv 2025 Cape Town RSA 6.2 Matfey Rogov Calvin John Klaasen 1-0 31 Open
14 2025-04-20 Cape Gambit Inv 2025 Cape Town RSA 5.3 Calvin John Klaasen Charlton Mnyasta 1/2-1/2 62 Open
15 2025-04-19 Cape Gambit Inv 2025 Cape Town RSA 4.1 Colomban Vitoux Calvin John Klaasen 1-0 77 Open
16 2025-04-19 Cape Gambit Inv 2025 Cape Town RSA 3.4 Jan Karsten Calvin John Klaasen 1-0 50 Open
17 2025-04-18 Cape Gambit Inv 2025 Cape Town RSA 2.2 Calvin John Klaasen Banele Mhango 1-0 46 Open
18 2025-04-18 Cape Gambit Inv 2025 Cape Town RSA 1.3 Watu Kobese Calvin John Klaasen 1/2-1/2 57 Open
19 2025-01-08 Cape Town Masters 2025 Cape Town RSA 4.4 Ethan Samuels Calvin John Klaasen 0-1 53 Open
20 2025-01-07 Cape Town Masters 2025 Cape Town RSA 3.4 Calvin John Klaasen Andre Schutte 1/2-1/2 52 Open
21 2025-01-06 Cape Town Masters 2025 Cape Town RSA 2.6 Calvin John Klaasen Eugene Milford 1-0 3 Open
22 2025-01-06 Cape Town Masters 2025 Cape Town RSA 1.7 Minenhle Junior Mncwabe Calvin John Klaasen 0-1 53 Open
23 2024-12-17 Titled Tue 17th Dec Early chess.com INT 8 Calvin John Klaasen Erick Marvin Guevara Sanchez 1-0 66 Open
24 2024-12-17 Titled Tue 17th Dec Early chess.com INT 7 Maxim Novik Calvin John Klaasen 1-0 36 Open
25 2024-12-17 Titled Tue 17th Dec Early chess.com INT 6 Calvin John Klaasen Luca Silva 0-1 35 Open
26 2024-12-17 Titled Tue 17th Dec Early chess.com INT 5 Calvin John Klaasen Mike Sailer 1-0 38 Open
27 2024-12-17 Titled Tue 17th Dec Early chess.com INT 4 Joshuaede Cappelletto Calvin John Klaasen 1-0 21 Open
28 2024-12-17 Titled Tue 17th Dec Early chess.com INT 3 Calvin John Klaasen Eduardo da Costa Marra 0-1 31 Open
29 2024-12-17 Titled Tue 17th Dec Early chess.com INT 2 Nikita Shandrygin Calvin John Klaasen 1-0 36 Open
30 2024-12-17 Titled Tue 17th Dec Early chess.com INT 1 Aaditya Dhingra Calvin John Klaasen 0-1 86 Open
31 2024-04-02 ch-RSA 2024 Cape Town RSA 11.6 Jan Karsten Calvin John Klaasen 1-0 36 Open
32 2024-04-01 ch-RSA 2024 Cape Town RSA 10.2 Calvin John Klaasen Jacob Dumisani Mnguni 1/2-1/2 17 Open
33 2024-03-31 ch-RSA 2024 Cape Town RSA 9.5 Daniel Barrish Calvin John Klaasen 1/2-1/2 22 Open
34 2024-03-31 ch-RSA 2024 Cape Town RSA 8.3 Calvin John Klaasen Caleb Levi Levitan 1/2-1/2 15 Open
35 2024-03-30 ch-RSA 2024 Cape Town RSA 7.4 Watu Kobese Calvin John Klaasen 1/2-1/2 29 Open
36 2024-03-29 ch-RSA 2024 Cape Town RSA 6.4 Calvin John Klaasen Daniel Cawdery 1/2-1/2 17 Open
37 2024-03-29 ch-RSA 2024 Cape Town RSA 5.3 Lutho Mfazwe Calvin John Klaasen 0-1 41 Open
38 2024-03-28 ch-RSA 2024 Cape Town RSA 4.5 Calvin John Klaasen Banele Mhango 1/2-1/2 44 Open
39 2024-03-27 ch-RSA 2024 Cape Town RSA 3.2 Keith Khumalo Calvin John Klaasen 1/2-1/2 55 Open
40 2024-03-26 ch-RSA 2024 Cape Town RSA 2.6 Calvin John Klaasen Charlton Mnyasta 0-1 38 Open
41 2024-03-25 ch-RSA 2024 Cape Town RSA 1.1 Calvin John Klaasen Michael Simpson 1-0 45 Open
42 2024-01-07 Cape Town Masters 2024 Cape Town RSA 9.3 Watu Kobese Calvin John Klaasen 1/2-1/2 56 Open
43 2024-01-06 Cape Town Masters 2024 Cape Town RSA 8.3 Calvin John Klaasen Charlton Mnyasta 1-0 38 Open
44 2024-01-06 Cape Town Masters 2024 Cape Town RSA 7.3 Matfey Rogov Calvin John Klaasen 1/2-1/2 43 Open
45 2024-01-05 Cape Town Masters 2024 Cape Town RSA 6.4 Calvin John Klaasen Edward Potgieter 1/2-1/2 53 Open
46 2024-01-05 Cape Town Masters 2024 Cape Town RSA 5.5 Reegan Palmer Calvin John Klaasen 0-1 39 Open
47 2024-01-04 Cape Town Masters 2024 Cape Town RSA 4.4 Calvin John Klaasen Tezihano Mnyasta 1/2-1/2 34 Open
48 2023-12-26 Titled Tue 26th Dec Early chess.com INT 8 Calvin John Klaasen Eric Dominguez Pons 0-1 39 Open
49 2023-12-26 Titled Tue 26th Dec Early chess.com INT 7 Calvin John Klaasen Chanchal Kumer Ghosh 1-0 42 Open
50 2023-12-26 Titled Tue 26th Dec Early chess.com INT 6 Matfey Yurasov Calvin John Klaasen 1-0 41 Open

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