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 ◀ Undo move

♞ You have reached King's Pawn Game B00 — the catalogued line ends exactly here.

Book continuations win% from 1.5M rated games

e5 1033 47% · 338k c5 401 50% · 140k e6 214 50% · 90k c6 110 50% · 79k Nf6 56 d5 48 49% · 99k Nc6 44 d6 44 49% · 37k g6 44 b6 7 a6 4 g5 4 f6 3 Nh6 2 a5 2 h5 2 h6 2 Na6 1 f5 1

Matching openings 2023

Barnes Defense B00 1 ply deeper
Borg Defense B00 1 ply deeper
Carr Defense B00 1 ply deeper
Duras Gambit B00 1 ply deeper
Goldsmith Defense B00 1 ply deeper
Hippopotamus Defense B00 1 ply deeper
Lemming Defense B00 1 ply deeper
Nimzowitsch Defense B00 1 ply deeper
Owen Defense B00 1 ply deeper
Pirc Defense B00 1 ply deeper
St. George Defense B00 1 ply deeper
Ware Defense B00 1 ply deeper

…and 2011 more lines run through this position — keep making moves to narrow it down.

3810 catalogued lines in total · openings encyclopedia