Tree path 6 levels King's Pawn Game › Sicilian Defense › Sicilian Defense › Hyperaccelerated Dragon › Sicilian Defense: Hyperaccelerated Dragon › Sicilian Defense: Hyperaccelerated Pterodactyl
- Chess Codex
- King's Pawn Game B00
- Sicilian Defense B20
- Sicilian Defense B27
- Hyperaccelerated Dragon B27
- Sicilian Defense: Hyperaccelerated Dragon B27
- Sicilian Defense: Hyperaccelerated Pterodactyl B27 you are here
Sicilian Defense: Hyperaccelerated Pterodactyl
Overview
Sicilian Defense: Hyperaccelerated Pterodactyl is a specific line in the Semi-Open Games family (ECO B27), arising from a recognised theoretical position.
The Semi-Open Games group covers semi-open games — replies to 1.e4 where Black declines the symmetrical 1…e5 in favour of an asymmetric pawn structure.
It begins with 6 plies and takes 1. e4 c5 2. Nf3 g6 3. d4 Bg7 to reach the canonical position.
The line refines Sicilian Defense: Hyperaccelerated Dragon, which traces back to the root opening King's Pawn Game.
The line splits into 2 documented sub-systems: Modern Defense: Pterodactyl Variation, Pterodactyl Defense: Western, Rhamphorhynchus.
Together the deeper variations number 8 across the full subtree.
Explore the position on the interactive board, study its real-world results from Lichess, and challenge the engine when you are ready.
- ECO code
- B27
- Group
- Semi-Open Games (B)
- Plies
- 6
- Direct variations
- 2
- Total in subtree
- 8
This overview is generated automatically from the opening's metadata. Know this line well? Write a description — submissions are reviewed before publishing.
Statistics from Lichess
1,915,324 games · White 46.7% / Draw 4.6% / Black 48.6%
| Moves | Games | W / D / B |
|---|---|---|
| c3 | 610,389 | |
| dxc5 | 425,125 | |
| d5 | 308,478 | |
| Be3 | 187,882 | |
| Nc3 | 173,840 | |
| Bc4 | 82,570 | |
| e5 | 64,435 | |
| c4 | 33,533 |
Source: Lichess Opening Explorer · cached 2026-09-26 01:21:19
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Variations (2)
Show all 8 sub-variations (full subtree)
- B27 Modern Defense: Pterodactyl Variation 8-ply
- B27 Pterodactyl Defense: Western, Rhamphorhynchus 8-ply
- B27 Pterodactyl Defense: Sicilian, Anhanguera 9-ply
- B27 Pterodactyl Defense: Sicilian, Benoni Gambit 9-ply
- B27 Pterodactyl Defense: Sicilian, Rhamphorhynchus 9-ply
- B27 Pterodactyl Defense: Sicilian, Unpin 9-ply
- B27 Pterodactyl Defense: Sicilian, Pteranodon 11-ply
- B27 Sicilian Defense: Hyperaccelerated Pterodactyl, Exchange Variation 12-ply