Tree path 5 levels King's Pawn Game › Modern Defense › Modern Defense › Standard Line › Modern Defense: Modern Pterodactyl
- Chess Codex
- King's Pawn Game B00
- Modern Defense B06
- Modern Defense B06
- Standard Line B06
- Modern Defense: Modern Pterodactyl B06 you are here
Modern Defense: Modern Pterodactyl
Overview
Modern Defense: Modern Pterodactyl is a named branch in the Semi-Open Games group of chess theory, classified under 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.
It is reached after 6 plies of play, with the move sequence 1. e4 g6 2. d4 Bg7 3. Nc3 c5.
In the opening tree, this line branches off from Modern Defense: Standard Line, part of the broader King's Pawn Game system.
5 named variations grow from this line, including Pterodactyl Defense: Eastern, Anhanguera, Pterodactyl Defense: Eastern, Benoni Pteranodon, Pterodactyl Defense: Eastern, Rhamphorhynchus, and others.
In total, the branch covers 7 sub-variations across all depths.
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
- 6
- Direct variations
- 5
- Total in subtree
- 7
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
752,502 games · White 49.5% / Draw 4.9% / Black 45.6%
| Moves | Games | W / D / B |
|---|---|---|
| Be3 | 202,341 | |
| Nf3 | 194,446 | |
| dxc5 | 165,852 | |
| d5 | 144,714 | |
| Nge2 | 23,395 | |
| e5 | 9,899 | |
| f4 | 4,603 | |
| f3 | 1,738 |
Source: Lichess Opening Explorer · cached 2026-09-26 01:19:33
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Variations (5)
Show all 7 sub-variations (full subtree)
- B06 Pterodactyl Defense: Eastern, Anhanguera 7-ply
- B06 Pterodactyl Defense: Eastern, Benoni Pteranodon 10-ply
- B06 Pterodactyl Defense: Eastern, Rhamphorhynchus 7-ply
- B06 Pterodactyl Defense: Sicilian, Quetzalcoatlus 10-ply
- B06 Pterodactyl Defense: Sicilian, Siroccopteryx 9-ply
- B06 Pterodactyl Defense: Eastern, Pteranodon 10-ply
- B06 Pterodactyl Defense: Eastern, Pterodactyl 8-ply