Lion Defense — opening family
6 catalogued lines · ECO B00–B07
The shortest catalogued line of the family runs 1. e4 d6 2. d4 Nf6 3. f3 — the position below. The continuation chips count how many catalogued lines extend this head with each next move; explore the full tree below and play any branch against the engine.
Variations tree of the Lion Defense family
Click any move to jump to that position; switch branches at any point with the alternative moves. Test your knowledge plays the shown position against the engine.
Start
All 6 lines
| Name | ECO | Main line length |
|---|---|---|
| Lion Defense: Lion's Jaw | B00 | 5 plies |
| Lion Defense | B07 | 6 plies |
| Lion Defense: Anti-Philidor | B07 | 7 plies |
| Lion Defense: Bayonet Attack | B07 | 7 plies |
| Lion Defense: Anti-Philidor, Lion's Cave | B07 | 8 plies |
| Lion Defense: Anti-Philidor, Lion's Cave, Lion Claw Gambit | B07 | 14 plies |