Pterodactyl Defense: Eastern, Benoni Pterodactyl
Overview
Pterodactyl Defense: Eastern, Benoni Pterodactyl is a chess opening at the root of the Semi-Open Games family, classified under ECO code B06.
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 is reached after 8 plies of play, with the move sequence 1. d4 g6 2. Nc3 Bg7 3. e4 c5 4. d5 Qa5.
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
- B06
- Group
- Semi-Open Games (B)
- Plies
- 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
5,841 games · White 52.7% / Draw 3.5% / Black 43.8%
| Moves | Games | W / D / B |
|---|---|---|
| Bd2 | 5,040 | |
| Nf3 | 308 | |
| Ne2 | 230 | |
| Qd3 | 58 | |
| f4 | 48 | |
| Bd3 | 28 | |
| Qf3 | 28 | |
| Be3 | 22 |
Source: Lichess Opening Explorer · cached 2026-09-26 01:46:57
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Submissions are reviewed before publishing.