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 d5 2. Nf3 Nf6 3. e3 e6 4. b3 c5 5. Bb2 Nc6
◀ Undo move
♞ You have reached Queen's Pawn Game: Colle System D05 — the catalogued line ends exactly here.
Matching openings 3
- Queen's Pawn Game: Colle System D05 1 ply deeper
- Queen's Pawn Game: Colle System D05 1 ply deeper
…and 1 more lines run through this position — keep making moves to narrow it down.
3810 catalogued lines in total · openings encyclopedia