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. c4 Nf6 2. d4 e5 3. dxe5 Ne4
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♞ You have reached Indian Defense: Budapest Gambit Accepted, Fajarowicz Defense A51 — the catalogued line ends exactly here.
Matching openings 3
- Indian Defense: Budapest Gambit Accepted, Fajarowicz Defense, Bonsdorf Variation A51 1 ply deeper
- Indian Defense: Budapest Gambit Accepted, Fajarowicz Defense, Steiner Variation A51 1 ply deeper
…and 1 more lines run through this position — keep making moves to narrow it down.
3810 catalogued lines in total · openings encyclopedia