Opening explorer
Walk any move order through the catalog: pick a book continuation and watch the board, or open the matching ECO lines on the side. By default move orders are strict — flip the toggle to group by position and pull in transpositions.
1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. Nc3 Qa5
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♞ You have reached Modern Defense: Pterodactyl Variation B27 — the catalogued line ends exactly here.
Matching openings 4
- Pterodactyl Defense: Sicilian, Anhanguera B27 1 ply deeper
- Pterodactyl Defense: Sicilian, Benoni Gambit B27 1 ply deeper
- Pterodactyl Defense: Sicilian, Unpin B27 1 ply deeper
…and 1 more lines run through this position — keep making moves to narrow it down.
3810 catalogued lines in total · openings encyclopedia