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 ◀ Undo move

♞ You have reached Nimzo-Indian Defense E20 — the catalogued line ends exactly here.

Book continuations

e3 49 Qc2 20 Nf3 8 Qb3 5 f3 5 a3 4 Bg5 3 Qd3 1 e4 1 g3 1

Matching openings 98

Nimzo-Indian Defense: Dilworth Gambit E20 1 ply deeper
Nimzo-Indian Defense: Kmoch Variation E20 1 ply deeper
Nimzo-Indian Defense: Mikenas Attack E20 1 ply deeper
Nimzo-Indian Defense: Romanishin Variation E20 1 ply deeper
Nimzo-Indian Defense: Three Knights Variation E21 1 ply deeper
Nimzo-Indian Defense: Spielmann Variation E22 1 ply deeper
Nimzo-Indian Defense: Sämisch Variation E24 1 ply deeper
Nimzo-Indian Defense: Leningrad Variation E30 1 ply deeper
Nimzo-Indian Defense: Classical Variation E32 1 ply deeper
Nimzo-Indian Defense: Rubinstein System E40 1 ply deeper
Nimzo-Indian Defense: Classical Variation, Zurich Variation E33 2 plies deeper
Nimzo-Indian Defense: Classical Variation, Noa Variation E34 2 plies deeper

…and 86 more lines run through this position — keep making moves to narrow it down.

3810 catalogued lines in total · openings encyclopedia