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Hedgehog System (Sicilian)
...a6, ...b6, ...d6, ...e6
The Hedgehog is less a single move-order and more a defensive structure that can arise from several Sicilian lines. Black sits behind a compact pawn shell, then strikes with well-timed breaks like ...d5 or ...b5 when White overextends.
ECO Code
B40-B59
Difficulty
Advanced
Style
Positional/Counterattacking
Key Themes
Patience, pawn breaks, piece harmony
Plans For Black
- Keep the shell: Maintain the compact pawn structure and avoid premature weakening
- Hit with a break: The main counterplay is ...d5 (sometimes ...b5) at the right moment
- Piece coordination: Place rooks on c8/e8, bishops on b7/e7, and knights to d7/c5 squares
- Counterattack timing: White often has space; Black must choose the correct moment to strike
Plans For White
- Use space carefully: Improve pieces without creating targets for Black's breaks
- Restrict ...d5: Control central squares and watch the moment Black frees the position
- Probe weaknesses: Pressure the b6/d6 pawns and dark squares if Black misplaces pieces
- Avoid overextension: The Hedgehog punishes careless pawn pushes with tactical counterplay
Common Breaks
...d5
Central liberation
The most important break, often freeing Black's pieces and equalizing in one shot if timed correctly.
...b5
Queenside expansion
Creates counterplay on the queenside and can open the b-file and diagonal pressure.
...f5
Kingside counterplay
Less common, but can be a strong resource when White's pieces are committed elsewhere.
Related Variations
Master the Hedgehog
Play patiently, build a resilient structure, and counterattack at the right moment.
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