D50: Queen's Gambit Declined, Semi-Tarrasch

D50 Sub-variants:

• Queen's Gambit Declined, 4.Bg5
  1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5
• Queen's Gambit Declined, Been-Koomen variation
  1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5
• Queen's Gambit Declined, Semi-Tarrasch, Krause variation
  1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5 5. Nf3 cxd4 6. Nxd4 e5 7. Ndb5 a6 8. Qa4
• Queen's Gambit Declined, Semi-Tarrasch, Primitive Pillsbury variation
  1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5 5. Nf3 cxd4 6. Qxd4
• Queen's Gambit Declined, Semi-Tarrasch
  1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5 5. cxd5
• Queen's Gambit Declined, Canal (Venice) variation
  1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5 5. cxd5 Qb6