Sicilian Defence, Dragon Variation

A factual read of the position after the main line — the files, the centre, the pawn structure and king safety that decide how the middlegame is played. These are computed from the actual board, not generic advice.

• 1White plays down the d-file — with no White pawn there, a rook lift and pawn lever turn this file into direct pressure on d7.
• 2Black's counterplay runs down the c-file: it is half-open for Black, so the rooks swing there to hit c2 while White is busy elsewhere.
• 3The centre is still fluid: decide early whether to lock it with a pawn advance or dissolve it with an exchange, because that choice picks the whole middlegame plan for you.

• Neutralise the c-file before Black owns it: challenge with your own rook, or close the file with a pawn so the opponent's main artery of play dries up.
• As White, strike at the fluid centre immediately with your own central pawn or piece pressure, before the opponent locks it into a shape that favours them.

These openings arrive at the very same board position by a different move order — a transposition. Knowing them lets you steer between systems and recognise when your opponent has walked into familiar territory.

Named (probably) by F.D.the name's origin is debated — some say the serpent-like shape of Black's fianchettoed position.

Advanced material. Concrete move orders, deep tactical motifs and razor-thin theory mean this rewards Black players who are 1800+ and willing to do homework.