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 e5 2. Bc4 Bc5 3. b4 ◀ Undo move

♞ You have reached Bishop's Opening: McDonnell Gambit C23 — the catalogued line ends exactly here.

Book continuations win% from 1.5M rated games

Bxb4 3

Matching openings 4

Bishop's Opening: McDonnell Gambit, La Bourdonnais-Denker Gambit C23 2 plies deeper
Bishop's Opening: McDonnell Gambit, McDonnell Double Gambit C23 2 plies deeper
Bishop's Opening: Four Pawns Gambit C23 12 plies deeper

…and 1 more lines run through this position — keep making moves to narrow it down.

3810 catalogued lines in total · openings encyclopedia