Queen's Gambit Declined - Semi-Tarrasch defence - Pillsbury variation
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. Bg5
White moves the queen's pawn to d4. Black moves the queen's pawn to d5. White pushes the c-pawn to c4.
Black pushes the king's pawn to e6. White develops the knight to c3. Black develops the knight to f6.
White jumps the knight to f3. Black plays the c-pawn to c5. White develops the dark-squared bishop to g5.