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Calvin Klaasen

South African chess player

Correspondence, annotated notebooks and portrait silhouettes prepared for research
People and ideasInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionJul 9, 2026
Entity authorityQ56877078 ↗
Source-derived summary

Calvin John Klaasen (born 1987) is a South African chess player who holds the title of FIDE Master.

Together with Johannes Mabusela he won the 2017 South African Closed Championships, and has played for the South African Chess Olympiad team in 2016 and 2018.

Editorial summary

The public source identifies “Calvin Klaasen” as south African chess player. This brief keeps that definition visible, then builds a research path around Calvin, Klaasen and South.

Editorial reviewA productive starting point for separating a subject’s documented career from later reputation and commemoration. The current lead gives the account dated anchors—1987, 2017, 2016, 2018—that can be checked directly. The linked authority record independently contributes the date 1987-05-16. Its value is orientation rather than verdict, with Calvin, Klaasen and South providing the first useful test.
Editorial analysis

Why this record matters

A short description can identify a subject without explaining its stakes. For “Calvin Klaasen”, the useful work is to connect “south African chess player” to the records capable of establishing context and consequence.

Evidence profile

Chronology provides the most reliable spine for this subject; interpretation should follow only after identities and dates are secure. The source revision retrieved here is dated Jul 9, 2026. The linked authority identifier is Q56877078. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1987, 2017, 2016 and 2018.

Critical limits

Public reputation and documentary evidence do not always develop together; absence from a summary is not evidence of historical absence. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.

How to read it

Read biographical claims against dates, named institutions and the cited references. Distinguish a subject’s later reputation from evidence produced during their lifetime.

Best used for
  • Establishing names and roles
  • Building a first chronology
  • Locating cited institutions
Verify next

Personal papers, civil or court records, institutional files and the scholarship cited by the source.

Three-step research path

  1. Establish the record: confirm the title “Calvin Klaasen”, its source revision and the description used here.
  2. Expand the search: follow Calvin Klaasen primary sources, Calvin Klaasen archive and Calvin research across catalogues and specialist indexes.
  3. Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.

Questions for further research

  1. Which source most directly establishes the central claim about “Calvin Klaasen”?
  2. Which claims depend on a single source or contested interpretation?
  3. How has the subject’s reputation changed across later accounts?
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Source & attribution

This entry incorporates text from “Calvin Klaasen” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.