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 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3 g5 5. d4 ◀ Undo move

♞ You have reached Vienna Gambit, with Max Lange Defense: Pierce Gambit C25 — the catalogued line ends exactly here.

Book continuations

g4 1

Matching openings 2

Vienna Game: Pierce Gambit, Rushmere Attack C25 8 plies deeper

…and 1 more lines run through this position — keep making moves to narrow it down.

3810 catalogued lines in total · openings encyclopedia