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. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4
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♞ You have reached Queen's Gambit Declined: Ragozin Defense D38 — the catalogued line ends exactly here.
Matching openings 4
- Queen's Gambit Declined: Ragozin Defense, Alekhine Variation D38 1 ply deeper
- Queen's Gambit Declined: Ragozin Defense, Vienna Variation D39 2 plies deeper
- Queen's Gambit Declined: Westphalian Variation D38 4 plies deeper
…and 1 more lines run through this position — keep making moves to narrow it down.
3810 catalogued lines in total · openings encyclopedia