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 e6 2. d4 d5 3. e5 c5 4. Qg4
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♞ You have reached French Defense: Advance Variation, Nimzowitsch Attack C02 — the catalogued line ends exactly here.
Book continuations win% from 1.5M rated games
Matching openings 2
- French Defense: Advance Variation, Nimzowitsch Gambit C02 2 plies deeper
…and 1 more lines run through this position — keep making moves to narrow it down.
3810 catalogued lines in total · openings encyclopedia