Englund Gambit
Pin the queen to the king
The attacking idea
Bring the bishop to b4. The queen cannot leave the diagonal while its king is behind it.
The temptation
Attacking the queen from c3 places White's own queen on a vulnerable diagonal.
If they defend
Use the knight and rook to develop with threats instead of exposing the queen.
Accurate defence can leave the attacker behind in material or development.
They take the bait
1. d4 1… e5 2. dxe5 2… Nc6 3. Nf3 3… Qe7 4. Bf4 4… Qb4+ 5. Qd2 5… Qxb2 6. Qc3 6… Bb4 7. Qxb4 7… Nxb4
They defend
1. d4 1… e5 2. dxe5 2… Nc6 3. Nf3 3… Qe7 4. Bf4 4… Qb4+ 5. Qd2 5… Qxb2 6. Nc3 6… Bb4 7. Rb1 7… Qa3 8. Rb3 8… Qa5