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. Nf3 c5 2. c4 Nf6 3. Nc3
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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 0
No catalogued line matches — this move order is off the book.
3810 catalogued lines in total · openings encyclopedia