Pterodactyl Defense: Eastern, Benoni Pterodactyl
1. d4 g6 2. Nc3 Bg7 3. e4 c5 4. d5 Qa5
The Pterodactyl Defense: Eastern, Benoni Pterodactyl is a chess opening classified as ECO B06, reached after 1. d4 g6 2. Nc3 Bg7 3. e4 c5 4. d5 Qa5. It is a line of the Pterodactyl Defense. White is to move.
In 12.6 million rated Lichess games (blitz and slower), this position was reached 4 times by this move order. White won 0%, 0% were drawn and Black won 100%. The most popular continuation is 5. Bd2 (75% of games).
Engine evaluation: +0.94 (Stockfish, depth 46; best line 5. Bd2 d6 6. f4 Nf6 7. Nf3 O-O)
- ECO
- B06
- Moves
- 8 plies
- FEN
rnb1k1nr/pp1pppbp/6p1/q1pP4/4P3/2N5/PPP2PPP/R1BQKBNR w KQkq - 1 5- PGN
1. d4 g6 2. Nc3 Bg7 3. e4 c5 4. d5 Qa5
Analyse with Stockfish · Board image (SVG) · Open on Lichess
Results by rating
| Average rating | Games | White / draw / Black |
|---|---|---|
| 1500-1999 | 2 | |
| 2000+ | 2 | |
| All | 4 |
Most played moves
| Move | Games | White / draw / Black |
|---|---|---|
| 5. Bd2 | 3 (75%) | |
| 5. Ne2 | 1 (25%) |
Highest-rated Lichess games
- Adnan_4 (2215) – SunBunnyOfGlassEye (2126) 0-1 · 2026-09-02 · 180 + 0s
- amng0 (2140) – SunBunnyOfGlassEye (2129) 0-1 · 2026-09-02 · 180 + 0s
- ArsentiyPsk (1759) – Kotovbrasil (1768) 0-1 · 2026-09-02 · 300 + 0s
Comes from
Queen's Pawn Game: Modern Defense 1. d4 g6
More Pterodactyl Defense lines (all)
- Pterodactyl Defense: Central, Benoni Beefeater Pterodactyl A40
- Pterodactyl Defense: Central, Benoni Pterodactyl A40
- Pterodactyl Defense: Fianchetto, Queen Benoni Pterodactyl A40
- Pterodactyl Defense: Fianchetto, Queen Pteranodon A40
- Pterodactyl Defense: Fianchetto, Queen Pterodactyl A40
- Pterodactyl Defense: Queen Pterodactyl, Quiet Line A40
- Pterodactyl Defense A42
- Pterodactyl Defense: Central, Bogolubovia A42
- Pterodactyl Defense: Austrian, Austriadactylus Western B06
- Pterodactyl Defense: Austrian, Grand Prix Pterodactyl B06
- Pterodactyl Defense: Austrian, Pteranodon B06
- Pterodactyl Defense: Central, Anhanguera B06
Opening names and moves from the Lichess openings dataset; statistics from the Lichess open database, 2026-09 (CC0), sample of 12.6 million games, bots excluded; evaluations from Lichess cloud analysis (all CC0). Master games from The Week in Chess #920–#1664 by Mark Crowther, used with permission.