Caro-Kann - Panov-Botvinnik - Reifir (Spielmann) variation
1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 Nc6 6. Bg5 Qb6
White plays the king's pawn to e4. Black moves the c-pawn to c6. White pushes the queen's pawn to d4.
Black moves the queen's pawn to d5. White captures on d5 with the king's pawn. Black captures on d5 with the c-pawn.
White moves the c-pawn to c4. Black develops the knight to f6. White develops the knight to c3.
Black transfers the knight to c6. White develops the dark-squared bishop to g5. Black deploys the queen to b6.