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. Nf3 Nf6 3. Nc3 Nc6 4. Bb5
◀ Undo move
♞ You have reached Four Knights Game: Spanish Variation C48 — the catalogued line ends exactly here.
Book continuations win% from 1.5M rated games
Matching openings 28
- Four Knights Game: Spanish Variation, Classical Variation C48 1 ply deeper
- Four Knights Game: Spanish Variation, Rubinstein Variation C48 1 ply deeper
- Four Knights Game: Spanish Variation, Double Spanish C49 1 ply deeper
- Four Knights Game: Spanish Variation, Ranken Variation C48 2 plies deeper
- Four Knights Game: Spanish Variation, Rubinstein Variation Accepted C48 2 plies deeper
- Four Knights Game: Spanish Variation, Rubinstein Variation C48 2 plies deeper
- Four Knights Game: Spanish Variation, Rubinstein Variation, Henneberger Variation C48 2 plies deeper
- Four Knights Game: Spanish Variation, Rubinstein Variation C48 4 plies deeper
- Four Knights Game: Spanish Variation, Double Spanish C49 4 plies deeper
- Four Knights Game: Spanish Variation, Nimzowitsch Variation C49 4 plies deeper
- Four Knights Game: Spanish Variation, Rubinstein Variation, Marshall Gambit C48 5 plies deeper
- Four Knights Game: Spanish Variation, Rubinstein Variation, Marshall Variation C48 5 plies deeper
…and 16 more lines run through this position — keep making moves to narrow it down.
3810 catalogued lines in total · openings encyclopedia