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. Nc3 Bb4 4. e3 b6 5. Ne2
◀ Undo move
♞ You have reached Nimzo-Indian Defense: St. Petersburg Variation E44 — the catalogued line ends exactly here.
Matching openings 4
- Nimzo-Indian Defense: St. Petersburg Variation, American Variation E44 1 ply deeper
- Nimzo-Indian Defense: St. Petersburg Variation, Fischer Variation E45 1 ply deeper
- Nimzo-Indian Defense: St. Petersburg Variation, Romanishin-Psakhis Variation E44 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