1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 - See Queen's Gambit. 4...e6 - Semi-Slav! Combines Slav and QGD.
White's plans: Play Bg5, e3, Bd3. Main lines or Anti-Moscow. Black's plans: Play ...Be7, ...O-O, ...dxc4. Meran or Botvinnik setups.
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