Tree path 7 levels King's Pawn Game › Modern Defense › Modern Defense › Standard Line › Modern Defense: Modern Pterodactyl › Pterodactyl Defense: Eastern, Rhamphorhynchus › Pterodactyl Defense: Eastern, Pterodactyl
- Chess Codex
- King's Pawn Game B00
- Modern Defense B06
- Modern Defense B06
- Standard Line B06
- Modern Defense: Modern Pterodactyl B06
- Pterodactyl Defense: Eastern, Rhamphorhynchus B06
- Pterodactyl Defense: Eastern, Pterodactyl B06 you are here
Pterodactyl Defense: Eastern, Pterodactyl
Overview
Pterodactyl Defense: Eastern, Pterodactyl is a variation within the Semi-Open Games family, indexed as ECO 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.
Play reaches this position via 1. e4 g6 2. d4 Bg7 3. Nc3 c5 4. dxc5 Qa5, after 8 plies of opening development.
It is a variation of Pterodactyl Defense: Eastern, Rhamphorhynchus, which itself descends from the root opening King's Pawn Game.
Step through the moves on the interactive board below, review the live Lichess statistics, or play this position against Stockfish at one of six difficulty levels.
- 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
70,520 games · White 52.9% / Draw 4.6% / Black 42.5%
| Moves | Games | W / D / B |
|---|---|---|
| Bd2 | 47,110 | |
| Ne2 | 7,581 | |
| Nf3 | 6,329 | |
| Be3 | 3,779 | |
| Bd3 | 2,760 | |
| Qd3 | 1,736 | |
| Qd5 | 329 | |
| Qf3 | 233 |
Source: Lichess Opening Explorer · cached 2026-09-26 01:47:00
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Submissions are reviewed before publishing.