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 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 ◀ Undo move

Book continuations win% from 1.5M rated games

a6 40 51% · 3k g6 34 50% · 1k Nc6 21 48% · 587 Bd7 1 e5 1 51% · 144

Matching openings 97

Sicilian Defense: Classical Variation B56 1 ply deeper
Sicilian Defense: Kupreichik Variation B56 1 ply deeper
Sicilian Defense: Dragon Variation B70 1 ply deeper
Sicilian Defense: Najdorf Variation B90 1 ply deeper
Sicilian Defense: Classical Variation, Fianchetto Variation B56 2 plies deeper
Sicilian Defense: Venice Attack B56 2 plies deeper
Sicilian Defense: Classical Variation, Sozin Attack B57 2 plies deeper
Sicilian Defense: Classical Variation B58 2 plies deeper
Sicilian Defense: Richter-Rauzer Variation B60 2 plies deeper
Sicilian Defense: Dragon Variation, Classical Variation B70 2 plies deeper
Sicilian Defense: Dragon Variation, Fianchetto Variation B70 2 plies deeper
Sicilian Defense: Dragon Variation, Levenfish Variation B71 2 plies deeper

…and 85 more lines run through this position — keep making moves to narrow it down.

3810 catalogued lines in total · openings encyclopedia