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. d4 g6 2. c4 Bg7 3. Nc3 c5 4. d5 Bxc3 5. bxc3 f5
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♞ You have reached Modern Defense: Beefeater Variation A40 — 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