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The move is usually known in English as the Légal Trap.
Bc4 is also White's route to an attempted Légal Trap.
According to Bjerke (Spillet i mitt liv), the Légal Trap has ensnared countless unwary players.
The Légal Trap or Blackburne Trap (also known as Légal Pseudo-Sacrifice and Légal Mate) is a chess opening trap, characterized by a queen sacrifice followed by checkmate with minor pieces if Black accepts the sacrifice.