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. Nf3 Nf6
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♞ You have reached Petrov's Defense C42 — the catalogued line ends exactly here.
Matching openings 56
- Petrov's Defense C42 1 ply deeper
- Petrov's Defense: Italian Variation C42 1 ply deeper
- Petrov's Defense: Three Knights Game C42 1 ply deeper
- Petrov's Defense: Modern Attack C43 1 ply deeper
- Petrov's Defense C42 2 plies deeper
- Petrov's Defense: Damiano Variation C42 2 plies deeper
- Petrov's Defense: Stafford Gambit C42 2 plies deeper
- Petrov's Defense: Modern Attack C43 2 plies deeper
- Petrov's Defense: Modern Attack, Symmetrical Variation C43 2 plies deeper
- Bishop's Opening: Boden-Kieseritzky Gambit C27 3 plies deeper
- Petrov's Defense C42 3 plies deeper
- Petrov's Defense: Cochrane Gambit C42 3 plies deeper
…and 44 more lines run through this position — keep making moves to narrow it down.
3810 catalogued lines in total · openings encyclopedia