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Harrwitz Attack
Queen's Gambit Declined1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4
Also known as Queen's Gambit Declined: Harrwitz Attack, 4. Nc3 Be7 5. Bf4, Queen's Gambit Declined, Harrwitz Attack, Harrwitz Attack, QGD.