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. c4 e6 2. d4 Nf6 3. Nc3 Bb4 4. e3
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♞ You have reached Nimzo-Indian Defense: Rubinstein System E40 — the catalogued line ends exactly here.
Book continuations win% from 1.5M rated games
Matching openings 49
- Nimzo-Indian Defense: Rubinstein System, Taimanov Variation E40 1 ply deeper
- Nimzo-Indian Defense: Rubinstein System E41 1 ply deeper
- Nimzo-Indian Defense: St. Petersburg Variation E43 1 ply deeper
- Nimzo-Indian Defense: Normal Variation E46 1 ply deeper
- Nimzo-Indian Defense: Rubinstein System, Rubinstein Variation E42 2 plies deeper
- Nimzo-Indian Defense: St. Petersburg Variation E44 2 plies deeper
- Nimzo-Indian Defense: Reshevsky Variation E46 2 plies deeper
- Nimzo-Indian Defense: Normal Variation E47 2 plies deeper
- Nimzo-Indian Defense E50 2 plies deeper
- Nimzo-Indian Defense: St. Petersburg Variation, American Variation E44 3 plies deeper
- Nimzo-Indian Defense: St. Petersburg Variation, Fischer Variation E45 3 plies deeper
- Nimzo-Indian Defense: Normal Variation, Classical Defense E48 3 plies deeper
…and 37 more lines run through this position — keep making moves to narrow it down.
3810 catalogued lines in total · openings encyclopedia