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.

⚖ Strict move orders

1. d4 Nf6 2. c4 e6 3. Nc3 ◀ Undo move

Book continuations win% from 1.5M rated games

Bb4 98 48% · 3k d5 15 51% · 2k c5 1 51% · 408

Matching openings 114

Nimzo-Indian Defense E20 1 ply deeper
Queen's Gambit Declined: Exchange Variation D35 2 plies deeper
Nimzo-Indian Defense: Dilworth Gambit E20 2 plies deeper
Nimzo-Indian Defense: Kmoch Variation E20 2 plies deeper
Nimzo-Indian Defense: Mikenas Attack E20 2 plies deeper
Nimzo-Indian Defense: Romanishin Variation E20 2 plies deeper
Nimzo-Indian Defense: Three Knights Variation E21 2 plies deeper
Nimzo-Indian Defense: Spielmann Variation E22 2 plies deeper
Nimzo-Indian Defense: Sämisch Variation E24 2 plies deeper
Nimzo-Indian Defense: Leningrad Variation E30 2 plies deeper
Nimzo-Indian Defense: Classical Variation E32 2 plies deeper
Nimzo-Indian Defense: Rubinstein System E40 2 plies deeper

…and 102 more lines run through this position — keep making moves to narrow it down.

3810 catalogued lines in total · openings encyclopedia