Tree path 3 levels Zukertort Opening › Sicilian Invitation › Modern Defense: Semi-Averbakh Variation, Pterodactyl Variation
- Chess Codex
- Zukertort Opening A04
- Sicilian Invitation A04
- Modern Defense: Semi-Averbakh Variation, Pterodactyl Variation A04 you are here
Modern Defense: Semi-Averbakh Variation, Pterodactyl Variation
Overview
Modern Defense: Semi-Averbakh Variation, Pterodactyl Variation is a specific line in the Flank Openings family (ECO A04), arising from a recognised theoretical position.
The Flank Openings group covers flank openings — systems that delay the central pawn break and instead develop pieces and pawns on the wings.
It is reached after 8 plies of play, with the move sequence 1. Nf3 c5 2. c4 g6 3. d4 Bg7 4. e4 Qa5+.
The line refines Zukertort Opening: Sicilian Invitation, which traces back to the root opening Zukertort Opening.
It continues primarily into one named line, Pterodactyl Defense.
Explore the position on the interactive board, study its real-world results from Lichess, and challenge the engine when you are ready.
- ECO code
- A04
- Group
- Flank Openings (A)
- Plies
- 8
- Direct variations
- 1
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
4,904 games · White 41.4% / Draw 6.9% / Black 51.8%
| Moves | Games | W / D / B |
|---|---|---|
| Nc3 | 3,497 | |
| Bd2 | 1,380 | |
| Qd2 | 21 | |
| Nbd2 | 5 | |
| Nfd2 | 1 |
Source: Lichess Opening Explorer · cached 2026-09-26 00:35:06
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