Queen's Gambit Declined - Orthodox defence - Botvinnik variation
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Bd3
White pushes the queen's pawn to d4. Black moves the queen's pawn to d5. White moves 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 develops the dark-squared bishop to g5. Black develops the dark-squared bishop to e7. White pushes the king's pawn to e3.
Black castles kingside. White moves the knight to f3. Black moves the knight to d7.
White places the light-squared bishop to d3.