Variations
Queen's Gambit Declined: Baltic Defense, Argentinian Gambit
3. cxd5 Bxb1 4. Qa4+ c6 5. dxc6 Nxc6
Queen's Gambit Declined: Baltic Defense, Pseudo-Chigorin
3. Nc3 e6 4. Nf3 Nc6
Queen's Gambit Declined: Baltic Defense, Queen Attack Deferred
3. Nc3 e6 4. Qb3