Format
KC
Klaasen, Calvin John
FM🇿🇦FIDE 14300133· Male· South Africa· Born in 1987
Follow Calvin John KlaasenTrack his monthly FIDE ratings, games, tournaments and more.
Calvin John Klaasen, a 39-year-old South African FIDE Master, is rated 2171 and ranked 21st among South African players, and in the top 5% worldwide. He has held steady between 2150 and 2200 for 2 years. 23 rated games in the past year (≈29/year long-term). Recent appearances: 2026 South African Closed Chess Championships (Open) and Cape Town Chess Federation Club League 2025 (A). He had 3 career breaks: 14 months (2007–2008), 23 months (2009–2011) and 27 months (2020–2022, COVID-19 included). His peak of 2320 was reached at age 31 (Jan 2018, South African #4 at the time); he spent 71 months in South African top 10, with a longest streak of 3 consecutive years.
Awarded FM in 2013 (age 26). At junior level, he reached #3 nationally in U20.
Current rating
2171
Standard
Rpd2167·Blz2270
All-time high
2320
−149 pts below
Jan 2018 · age 31
Jan 2018 · age 31
Activity
36
games / yr avg. · ≈3/mo
23 past 12 mo · ≈2/mo
classical only
Active
classical only
Active
Signature stat
#21
#21 · South African players · of 1,804
71 months in National top 10 (2016–2023)
71 months in National top 10 (2016–2023)
Career timeline
20 entries2024
500 career games
at age 37
Nov 2024
2023
71 months in national top 10
longest streak 41 months · since Jan 2016
Oct 2023
Re-crossed 2200
at age 36
Jun 2023
2022
Re-crossed 2200
at age 35
Nov 2022
2020
Inactive for 27 months
paused at 2208 → returned at 2245
Jan 2020
2018
Re-crossed 2300
at age 31
Jun 2018
Standard rating history
Peak
FIDE title
Threshold
First rated
Inactive period
COVID-19
Activity & highlights
Top opponent
Evolution
-16
2187 → 2171
Tournaments
3
23 games
Score
11.5/ 2350.0%
8W7D8L
Top 3 wins
Top 3 losses
Last 12 months — tournaments
3 events| Event | Date | Score | Rank | Perf | Δ Elo |
|---|---|---|---|---|---|
Open Swiss | Apr 2026 | 4.5/9 | #14 | 2150 | -6.0 |
Round-Robin | Feb 2026 | 4.5/11 | #9 | 2150 | -13.0 |
Team | Jul 2025 | 2.5/3 | #81 | 2190 | +3.2 |
Most-Played Opponents
vsWatu KobeseIM
🇿🇦RSA·2237
+6 −14 =13
33 games·last met Apr 2025
View head-to-head →
vsDaniel BarrishFM
🇿🇦RSA·2245
+6 −3 =9
18 games·last met Feb 2026
View head-to-head →
vsDonovan Van den HeeverIM
🇿🇦RSA·2169
+1 −4 =8
13 games·last met Jul 2023
View head-to-head →
vsDaniel CawderyIM
🇿🇦RSA·2312
+0 −4 =8
12 games·last met Feb 2026
View head-to-head →
vsMohamed Ozayr BhawoodienFM
🇿🇦RSA·2178
+5 −2 =5
12 games·last met Sep 2025
View head-to-head →
Rankings
/
South Africa
#21
out of 1,876 players
Africa
#149
in continent
World
#9,856
out of 400,000+
National ranking
Europe & World
Europe
World
South Africa
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| 21 | 2,171 | |
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| 149 | 2,171 | |
World
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