Tree path 7 levels King's Pawn Game › Sicilian Defense › Sicilian Defense › Hyperaccelerated Dragon › Sicilian Defense: Hyperaccelerated Dragon › Sicilian Defense: Hyperaccelerated Pterodactyl › Modern Defense: Pterodactyl Variation
- 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
- Modern Defense: Pterodactyl Variation B27 you are here
Modern Defense: Pterodactyl Variation
Overview
Modern Defense: Pterodactyl Variation 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.
It begins with 8 plies and takes 1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. Nc3 Qa5 to reach the canonical position.
In the opening tree, this line branches off from Sicilian Defense: Hyperaccelerated Pterodactyl, part of the broader King's Pawn Game system.
3 named variations grow from this line, including Pterodactyl Defense: Sicilian, Anhanguera, Pterodactyl Defense: Sicilian, Benoni Gambit, Pterodactyl Defense: Sicilian, Unpin.
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
- 8
- Direct variations
- 3
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
25,696 games · White 43.0% / Draw 4.7% / Black 52.3%
| Moves | Games | W / D / B |
|---|---|---|
| Be3 | 8,856 | |
| Bd2 | 4,919 | |
| Bc4 | 3,214 | |
| dxc5 | 3,106 | |
| Be2 | 2,230 | |
| d5 | 1,362 | |
| e5 | 1,091 | |
| Qd3 | 282 |
Source: Lichess Opening Explorer · cached 2026-09-26 01:47:51
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