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.

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1. d4 d5 2. e4 dxe4 3. Nc3 e5 ◀ Undo move

♞ You have reached Blackmar-Diemer Gambit: Lemberger Countergambit D00 — the catalogued line ends exactly here.

Book continuations

3810 catalogued lines in total · openings encyclopedia