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. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3
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♞ You have reached Catalan Opening: Open Defense E04 — the catalogued line ends exactly here.
Matching openings 3
- Catalan Opening: Open Defense, Classical Line E05 1 ply deeper
- Catalan Opening: Open Defense, Modern Sharp Variation E04 3 plies deeper
…and 1 more lines run through this position — keep making moves to narrow it down.
3810 catalogued lines in total · openings encyclopedia