Desprez Opening
irregular chess opening 1. h4
The Despréz Opening, also called the Kádas Opening, is a chess opening characterized by the opening move:
1.h4
The opening is named after the French player Marcel Després. Like a number of other rare openings, 1.h4 has some alternate names such as Anti-Borg Opening, Samurai Opening, Harry's Opening and Reagan's Attack.
As the Despréz Opening is very rare, it is considered an irregular opening and is classified under the A00 code in the Encyclopaedia of Chess Openings.
Assessment
Like 1.a4, the Ware Opening, 1.h4 does nothing in the fight for central space and does very little in the way of development. The only piece released is the rook, which is usually not developed to h3. In addition, 1.h4 weakens White's kingside. For these reasons, 1.h4 is among the rarest of the twenty possible first moves for White.
Black usually responds by grabbing the center with 1...d5 or 1...e5. A simple and sound development by 1...Nf6 is also possible. The response 1...g6, intending to fianchetto Black's bishop on g7, is rare, because White can undermine Black's pawn structure with 2.h5, making 1.h4 seem logical.
This brief starts where responsible research should: with the source description of “Desprez Opening” as irregular chess opening 1. h4. Everything that follows is an evidence route, not borrowed authority.
Why this record matters
The subject matters to the general reference register because the source frames it as irregular chess opening 1. h4. Its deeper value depends on whether names, dates, institutions and citations support that framing.
Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Jun 17, 2026. The linked authority identifier is Q1528520. None of the 0 selected statements returned an explicit reference.
Overview language is designed for orientation and should not be treated as a substitute for the evidence cited beneath it. 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
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “Desprez Opening”, its source revision and the description used here.
- Expand the search: follow Desprez Opening primary sources, Desprez Opening archive and Desprez research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Desprez Opening”?
- Which institution is responsible for the underlying evidence?
- Which cited source is closest to the event, object or claim?
Search terms from this dossier
This entry incorporates text from “Desprez Opening” 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.