Queen's Gambit Declined - Tarrasch - Schlechter-Rubinstein system
1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3
White pushes the queen's pawn to d4. Black moves the queen's pawn to d5. White plays the c-pawn to c4.
Black plays the king's pawn to e6. White develops the knight to c3. Black plays the c-pawn to c5.
White captures on d5 with the c-pawn. Black captures on d5 with the king's pawn. White transfers the knight to f3.
Black develops the knight to c6. White advances the g-pawn to g3.