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. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 ◀ Undo move

Book continuations win% from 1.5M rated games

O-O 108 53% · 1k Qe2 3 50% · 53 d3 2 55% · 461 Bxc6 1 Nc3 1 51% · 120 c3 1 d4 1

Matching openings 117

Ruy Lopez: Morphy Defense, Anderssen Variation C77 1 ply deeper
Ruy Lopez: Morphy Defense, Bayreuth Variation C77 1 ply deeper
Ruy Lopez: Morphy Defense, Jaffe Gambit C77 1 ply deeper
Ruy Lopez: Morphy Defense, Mackenzie Variation C77 1 ply deeper
Ruy Lopez: Morphy Defense, Tarrasch Variation C77 1 ply deeper
Ruy Lopez: Morphy Defense, Wormald Attack C77 1 ply deeper
Ruy Lopez: Morphy Defense C78 1 ply deeper
Ruy Lopez: Brix Variation C78 2 plies deeper
Ruy Lopez: Central Countergambit C78 2 plies deeper
Ruy Lopez: Morphy Defense, Møller Variation C78 2 plies deeper
Ruy Lopez: Morphy Defense, Steinitz Deferred C79 2 plies deeper
Ruy Lopez: Open C80 2 plies deeper

…and 105 more lines run through this position — keep making moves to narrow it down.

3810 catalogued lines in total · openings encyclopedia