Tree path 9 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 › Pterodactyl Defense: Sicilian, Pteranodon
- 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
- Pterodactyl Defense: Sicilian, Pteranodon B27 you are here
Pterodactyl Defense: Sicilian, Pteranodon
Overview
Pterodactyl Defense: Sicilian, Pteranodon is a named branch in the Semi-Open Games group of chess theory, classified under ECO B27.
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.
Play reaches this position via 1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. dxc5 Qa5+ 5. Nc3 Bxc3+ 6. bxc3, after 11 plies of opening development.
In the opening tree, this line branches off from Pterodactyl Defense: Sicilian, Rhamphorhynchus, part of the broader King's Pawn Game system.
It continues primarily into one named line, Sicilian Defense: Hyperaccelerated Pterodactyl, Exchange Variation.
Use the board to walk through every move, check how the position has scored on Lichess, or take it head-to-head against Stockfish.
- ECO code
- B27
- Group
- Semi-Open Games (B)
- Plies
- 11
- Direct variations
- 1
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
32,041 games · White 48.0% / Draw 4.8% / Black 47.2%
| Moves | Games | W / D / B |
|---|---|---|
| Qxc3+ | 29,791 | |
| Nf6 | 1,264 | |
| Qxc5 | 764 | |
| Nc6 | 200 | |
| Na6 | 11 | |
| Qa6 | 3 | |
| Qa4 | 3 | |
| Qb4 | 2 |
Source: Lichess Opening Explorer · cached 2026-09-26 02:25:00
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