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. Nf3 b6 3. g3 Bb7 4. Bg2 c5
◀ Undo move
♞ You have reached Marienbad System A47 — the catalogued line ends exactly here.
Book continuations
Matching openings 2
- Marienbad System: Berg Variation A47 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