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. Move orders, not transpositions — exactly the paths over the board. Prefer the family trees? Every opening page has one.
1. e4 e5 2. Bc4 Bc5 3. b4 Bxb4 4. f4
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♞ You have reached Bishop's Opening: McDonnell Gambit, McDonnell Double Gambit C23 — the catalogued line ends exactly here.
Book continuations
Matching openings 2
- Bishop's Opening: Four Pawns Gambit C23 10 plies deeper
…and 1 more lines run through this position — keep making moves to narrow it down.
3810 catalogued lines in total · openings encyclopedia