Sicilian Defence
Let an agent identify the Sicilian Defence and its main variations, explain its ideas and typical plans from opening theory, relay classification codes and reference sources, and route current theory to databases.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent identify the Sicilian Defence and its main variations, explain its ideas and typical plans from opening theory, relay classification codes and reference sources, and route current theory to databases.
A chess opening beginning with 1.e4 c5, in which Black answers the king pawn with the queen bishop pawn to create an unbalanced game and fight for the centre from the side; the most popular reply to 1.e4 at all levels, with major variations including the Najdorf, Dragon, Scheveningen, Sveshnikov, Classical and closed lines and gambits such as the Smith-Morra.
What it is for: Answering 1.e4 with an unbalanced fighting game.
It can be identify the opening and variations from moves; explain the main ideas and plans; relay ECO codes and references; distinguish it from other replies to 1.e4.
Distinguishing features
Asymmetric pawn structure
Most popular reply to 1.e4
Vast theory with many named variations
Sharp and strategic lines
What it looks like
Not a physical object; a position after 1.e4 c5.
Physical character
ECO codes: B20-B99 codes
How it is recognised
Moves 1.e4 c5
Branches by both sides choices, open and closed systems
The French, Caro-Kann and 1...e5 are other replies to 1.e4
Related models
is a kind of - a semi-open game
is a kind of - openings after 1.e4 without 1...e5
includes - a major branch
is contrasted with - another reply to 1.e4
In practice
Families and kinds
Open Sicilian with 2.Nf3 and 3.d4
Najdorf Variation
Dragon Variation
Scheveningen and Classical Variations
Sveshnikov and Kalashnikov
Closed Sicilian
anti-Sicilians and gambits such as the Smith-Morra and Wing Gambit
Identifiers
ECO B20-B99 Encyclopaedia of Chess Openings
Standards and regulation
FIDE laws of chess
ECO classification conventions
Failure modes and hazards
Confusing variations and move orders
Outdated theory presented as current
Overwhelming beginners with theory
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Identify What the opening is.
Identity.
Moves
Defining moves.
Moves
Moves.
- What moves define the Sicilian Defence, and how do the main variations branch? definition
- Is the question about the Sicilian or another reply to 1.e4? boundary
Codes
Classification.
Codes
Codes.
- Which ECO codes cover the opening and its variations? provenance
- Which entry fits a specific variation? action
Ideas Strategy.
Plans.
Plans
Typical plans.
Plans
Plans.
- What are the strategic ideas for both sides, such as the d5 break and the kingside attack? provenance
- Which references are standard? provenance
Theory
Current theory.
Theory
Theory.
- What does current theory say about the main lines, and how has it changed? provenance
- Is the assessment current? boundary
Play Practice.
Play.
Level
Suitability by level.
Level
Level.
- How is the Sicilian used at club and top level, and which lines suit which players? provenance
- Which entry fits chess training? action
Games
Notable games.
Games
Games.
- Which famous games illustrate the opening? provenance
- Which entry fits a specific game? action
Context History.
Context.
History
History.
History
History.
- How did the Sicilian develop from early mentions to its modern dominance? provenance
- Which entry fits the history of chess openings? action
Players
Players associated.
Players
Players.
- Which players are associated with the main variations? provenance
- Which entry fits a specific player? action
What the second pass must settle
- Should each major variation be a separate entry?
- How should opening databases be linked?
- The registry entry has merged aliases naming many variations; should they be split off?