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Lion Defense: Bayonet Attack is a chess opening that arises after 1.e4 d6 2.d4 Nf6 3.Nc3 Nbd7 4.g4. It is classified B07 in the ECO system, and the position after these moves has black to move.
This line is a variation within the Lion Defense family. The strategic ideas above describe the family as a whole; this particular line reaches them by the move order 1.e4 d6 2.d4 Nf6 3.Nc3 Nbd7 4.g4.