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Closed games(1. d4 d5) (c4 : Queen's Gambit (...c6 (Nf3 (...Nf6 (Nc3 (…

- - - - Nc3 Nf6 4. Bg5 Be7 5.Nf3
  - - - Nf3 Nf6 4. e3 e6 5.Bxc4 c5 6. o-o a6
  - - - ...Nf6
        
        Nc3
        
        ...e6
        
        Semi-Slav
        
        e3 Nbd7
        
        ...dxc4 5. a4 Bf5
        
        Czech Variation