Tree path 8 levels King's Pawn Game › Sicilian Defense › Sicilian Defense › Hyperaccelerated Dragon › Sicilian Defense: Hyperaccelerated Dragon › Sicilian Defense: Hyperaccelerated Pterodactyl › Pterodactyl Defense: Western, Rhamphorhynchus › Pterodactyl Defense: Sicilian, Rhamphorhynchus
- 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
- Pterodactyl Defense: Western, Rhamphorhynchus B27
- Pterodactyl Defense: Sicilian, Rhamphorhynchus B27 you are here
Pterodactyl Defense: Sicilian, Rhamphorhynchus
Overview
Pterodactyl Defense: Sicilian, Rhamphorhynchus 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 9 plies and takes 1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. dxc5 Qa5+ 5. Nc3 to reach the canonical position.
The line refines Pterodactyl Defense: Western, Rhamphorhynchus, which traces back to the root opening King's Pawn Game.
It continues primarily into one named line, Pterodactyl Defense: Sicilian, Pteranodon.
Together the deeper variations number 2 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
- 9
- Direct variations
- 1
- Total in subtree
- 2
This overview is generated automatically from the opening's metadata. A more detailed, human-written description is on the way — and you can speed it up by suggesting one yourself.
Statistics from Lichess
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| Moves | Games | W / D / B |
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Source: Lichess Opening Explorer · cached
Description
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