Catalan - open - 5.Qa4 Nbd7 - 6.Qxc4

White plays the queen's pawn to d4. Black develops the knight to f6. White pushes the c-pawn to c4.

Black moves the king's pawn to e6. White moves the g-pawn to g3. Black plays the queen's pawn to d5.

White develops the light-squared bishop to g2. Black captures on c4 with the queen's pawn. White deploys the queen to a4, giving check.

Black jumps the knight to d7. White captures with the queen on c4.