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.
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Ne2
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♞ 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