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 Bb4 4. Qc2 c5 5. dxc5 ◀ Undo move

Book continuations win% from 1.5M rated games

O-O 2 Bxc3+ 1

Matching openings 3

Nimzo-Indian Defense: Classical Variation, Berlin Variation, Steiner Variation E38 1 ply deeper
Nimzo-Indian Defense: Classical Variation, Berlin Variation, Pirc Variation E39 1 ply deeper
Nimzo-Indian Defense: Classical Variation, Berlin Variation, Macieja System E39 5 plies deeper

3810 catalogued lines in total · openings encyclopedia