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. By default move orders are strict — flip the toggle to group by position and pull in transpositions.
⚖ Grouping by position
Grouping by position: lines that reach this position by a different move order are included too.
1. d4 e6 2. c4 Nf6 3. Nc3 Bb4 4. e3 b6
◀ Undo move
♞ You have reached Nimzo-Indian Defense: St. Petersburg Variation E43 — the catalogued line ends exactly here.
Matching openings 12
- Nimzo-Indian Defense: St. Petersburg Variation E44 1 ply deeper
- Nimzo-Indian Defense: St. Petersburg Variation, American Variation E44 2 plies deeper
- Nimzo-Indian Defense: St. Petersburg Variation, Fischer Variation E45 2 plies deeper
- Nimzo-Indian Defense: St. Petersburg Variation E43 3 plies deeper
- Nimzo-Indian Defense: St. Petersburg Variation E43 4 plies deeper
- Nimzo-Indian Defense: St. Petersburg Variation, with Ne4 E43 4 plies deeper
- Nimzo-Indian Defense: St. Petersburg Variation, Romanishin-Psakhis Variation E44 4 plies deeper
- Nimzo-Indian Defense: St. Petersburg Variation E43 5 plies deeper
- Nimzo-Indian Defense: St. Petersburg Variation E43 6 plies deeper
- Nimzo-Indian Defense: Normal Variation, Schlechter Defense E52 6 plies deeper
- Nimzo-Indian Defense: St. Petersburg Variation E43 10 plies deeper
…and 1 more lines run through this position — keep making moves to narrow it down.
3810 catalogued lines in total · openings encyclopedia