Pterodactyl Defense: Fianchetto, King Pterodactyl
1. e4 g6 2. d4 Bg7 3. g3 c5 4. Nf3 Qa5+
The Pterodactyl Defense: Fianchetto, King Pterodactyl is a chess opening classified as ECO B06, reached after 1. e4 g6 2. d4 Bg7 3. g3 c5 4. Nf3 Qa5+. It is a line of the Pterodactyl Defense. White is to move.
This exact move order didn't appear in our sample of 12.6 million Lichess games: it's a rare line.
Engine evaluation: +0.25 (Stockfish, depth 30; best line 5. Bd2 Qb6 6. Bc3 cxd4 7. Bxd4 Bxd4)
- ECO
- B06
- Moves
- 8 plies
- FEN
rnb1k1nr/pp1pppbp/6p1/q1p5/3PP3/5NP1/PPP2P1P/RNBQKB1R w KQkq - 2 5- PGN
1. e4 g6 2. d4 Bg7 3. g3 c5 4. Nf3 Qa5+
Analyse with Stockfish · Board image (SVG) · Open on Lichess
Comes from
Modern Defense (2. d4 Bg7) 1. e4 g6 2. d4 Bg7
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.