Queen's Gambit Declined - Semi-Tarrasch - symmetrical variation
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. e3 Nc6 6. Bd3 Bd6 7. O-O O-O
White pushes the queen's pawn to d4. Black advances the queen's pawn to d5. White pushes the c-pawn to c4.
Black plays 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 moves the king's pawn to e3.
Black jumps the knight to c6. White develops the light-squared bishop to d3. Black develops the dark-squared bishop to d6.
White castles kingside. Black castles kingside.