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Sicilian Defence

chess opening: 1. e4 c5

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General referenceInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionSep 15, 2026
Entity authorityQ188566
Source-derived summary

The Sicilian Defence is a chess opening that begins with the following moves:

1. e4 c5

1...c5 is one of the most popular responses to White's first move 1.e4. Like 1...e5, the move contests control of the d4-square, but breaks symmetry immediately, often leading to dynamic and sharp positions.

The earliest recorded notes on the Sicilian Defence date back to the late 16th century by the Italian chess players Giulio Polerio and Gioachino Greco. It was extremely popular in the second half of the 20th century and was extensively played and analysed by many grandmasters, such as Bobby Fischer, Garry Kasparov, and Mikhail Tal.

General concepts

By advancing the c-pawn two squares, Black asserts control over the d4-square and begins the fight for the centre of the board. The move resembles 1...e5, the next most common response to 1.e4, in that respect. Unlike 1...e5, however, 1...c5 breaks the symmetry of the position, which strongly influences both players' future actions. White, having pushed a kingside pawn, tends to hold the initiative on that side of the board. However, 1...c5 does little for Black's development, unlike moves such as 1...e5, 1...g6, or 1...Nc6, which either develop a minor piece or prepare to do so.

Editorial summary

“Sicilian Defence” enters the record as chess opening: 1. e4 c5. Crown Archives preserves that source wording while asking what Sicilian, Defence and chess can confirm, complicate or overturn.

Editorial reviewA practical starting point whose main value is the path it opens into stronger specialist and primary sources. The current 202-word lead offers orientation but no explicit four-digit date, so chronology should not be assumed. The selected authority fields contribute no independent date. Its strongest next move is a source search built around Sicilian, Defence and chess.
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“Sicilian Defence” is worth following because a concise public description often conceals a longer documentary argument. Here, Sicilian, Defence and chess provides the most credible route into that argument.

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Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Sep 15, 2026. The linked authority identifier is Q188566. The Library of Congress control number is sh2001008186. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank.

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Source & attribution

This entry incorporates text from Sicilian Defence” 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.