D12: Queen's Gambit Declined Slav, Landau variation

D12 Sub-variants:

• Queen's Gambit Declined Slav, 4.e3 Bf5
  1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bf5
• Queen's Gambit Declined Slav, Landau variation
  1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bf5 5. cxd5 cxd5 6. Qb3 Qc8 7. Bd2 e6 8. Na3
• Queen's Gambit Declined Slav, exchange variation
  1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bf5 5. cxd5 cxd5 6. Nc3
• Queen's Gambit Declined Slav, Amsterdam variation
  1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bf5 5. cxd5 cxd5 6. Nc3 e6 7. Ne5 Nfd7