Queen's Gambit Declined - Chigorin defence - Janowski variation
1. d4 d5 2. c4 Nc6 3. Nc3 dxc4 4. Nf3
White moves the queen's pawn to d4. Black pushes the queen's pawn to d5. White advances the c-pawn to c4.
Black develops the knight to c6. White develops the knight to c3. Black captures on c4 with the queen's pawn.
White jumps the knight to f3.