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. Move orders, not transpositions — exactly the paths over the board. Prefer the family trees? Every opening page has one.
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Bb4
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♞ You have reached Sicilian Defense: Pin Variation B40 — the catalogued line ends exactly here.
Matching openings 3
- Sicilian Defense: Pin Variation, Koch Variation B40 1 ply deeper
- Sicilian Defense: Pin Variation, Jaffe Variation B40 2 plies deeper
…and 1 more lines run through this position — keep making moves to narrow it down.
3810 catalogued lines in total · openings encyclopedia