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. e4 e5 2. Nf3 Nc6 3. Bb5 Bb4 4. c3 Ba5
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Book continuations win% from 1.5M rated games
Matching openings 1
- Ruy Lopez: Alapin Defense, Alapin Gambit C60 2 plies deeper
3810 catalogued lines in total · openings encyclopedia