Chess Openings Lab
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Sicilian Defense: Hyperaccelerated Dragon

The Hyperaccelerated Dragon is 1.e4 c5 2.Nf3 g6, where Black fianchettoes before playing ...d6 or ...Nc6. White can open the center with d4, grab space with c4, or set up an Alapin with c3.

Moves
1.e4 c5 2.Nf3 g6
ECO
B27
Engine
+0.52 · a slight edge for White (Stockfish 17.1, depth 20)
Played
4,749 games in our lichess sample
White scores
48.6%

Key ideas for both sides

White

  • 3.d4 cxd4 Nxd4 leads to open Dragons where Black can still choose ...d6 or ...d5.
  • c4 grabs space for a Maroczy bind and limits Black's freeing breaks.
  • 3.c3 with d4 builds a pawn center; ...d5 then leads to e5 and French-like play.
  • Bc4 is useful in many lines, aiming at f7 and the d5 square.

Black

  • Fianchetto with ...Bg7, then add ...Nc6 and ...Nf6 for quick, harmonious development.
  • Against c3, ...d5 hits e4 and sets up a solid center with ...Bg4 ideas.
  • In Maroczy lines, use ...Nc6 and ...d6 and look for ...b5 or ...f5 breaks.
  • The ...d5 break is often available because ...d6 has not been played yet.

Plans and pawn structure

The g7 bishop guides Black's plans. White can open with d4 and Nxd4, or build a bind with c4. In open lines Black often plays ...Nc6, ...Nf6 and ...d6, but ...d5 is an option, since the pawn is still on d7. In Maroczy positions Black uses dark squares and breaks like ...b5. In c3 lines, the game turns into a central fight with pawn chains.

What the engine plays from here

Stockfish 17.1 at depth 20 rates the position +0.52: a slight edge for White. Its three top choices for White:

  1. +0.52 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6
  2. +0.47 3.c4 Nc6 4.d4 cxd4 5.Nxd4 Nf6
  3. +0.29 3.c3 d5 4.e5 Nc6 5.d4 Bg4

Pawns, from White's side.

How it scores on lichess

4,749 rated lichess games reached this position; White scored 48.6%.

under 120046.3%
1200–159948.7%
1600–199948.1%
2000 and up50.0%

Light: White wins. Grey: draws. Dark: Black wins. About the sample.

Where it goes next

  • Hyperaccelerated Pterodactyl3.d4 · 1,356 games
  • Acton Extension3.c4 · rare
  • Dragon Variation, Classical Variation, Bernard Defense3.d4 · rare
  • Western, Pterodactyl3.c3 · rare

How to play against it

With White, 3.d4 is direct and leads to known lines after Nxd4. If you like space, c4 is a good option and makes ...d5 hard. Avoid allowing Black to play ...d5 without a cost, since the early fianchetto then works well against your center.

Other lines with this name

The lichess opening list also files this line under the same name, though it reaches a different position: 1.e4 c5 2.Nf3 g6 3.d4.

Questions

What are the moves of the Sicilian Defense: Hyperaccelerated Dragon?

The Sicilian Defense: Hyperaccelerated Dragon starts 1.e4 c5 2.Nf3 g6. Its ECO code is B27.

Is the Sicilian Defense: Hyperaccelerated Dragon good for Black?

Stockfish 17.1 rates the position +0.52 at depth 20, which is a slight edge for White. In 4,749 lichess games from our sample, White scored 48.6%. Good for flexible Black players who like Dragon ideas without the main-line theory; White needs a clear setup choice.

What is the main idea of the Sicilian Defense: Hyperaccelerated Dragon?

Black fianchettoes early to fight for the dark squares. White chooses between d4, c4 and c3 setups, each giving a different structure.

What should White play next?

The engine's first choice is d4, with c4 and c3 close behind. 3.d4 opens the center and tests Black's early fianchetto.

Updated October 2026. Sources and method.