Va banque is a gambling term from a card game in which winning or losing occurs when cards turned up by the banker match what?
Va banque: Va banque or Vabanque is a gambling term from the card game of Pharo or Faro, which was popular in the 18th and 19th century. Faro (card game): Faro, "Pharaoh", or "Farobank" is a late 17th-century French gambling card game. Faro (card game):  Winning or losing occurs when cards turned up by the banker match those already exposed.
those already exposed