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.
1. e4 e5 2. Nf3 Nc6 3. Bb5 Bb4 4. c3 Ba5 5. Bxc6 dxc6
◀ Undo move
♞ You have reached Ruy Lopez: Alapin Defense, Alapin Gambit C60 — the catalogued line ends exactly here.
Book continuations win% from 1.5M rated games
No catalogued line continues from here — the book ends at this position. Undo a move or start a different order.
Matching openings 1
Only the line above reaches this exact move order.
3810 catalogued lines in total · openings encyclopedia