Queen's Gambit Declined - Lasker variation
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 Ne4
White moves the queen's pawn to d4. Black pushes the queen's pawn to d5. White advances 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 transfers the knight to e4.