go for all the marbles

To attempt to achieve total victory or win the entirety of a prize or reward, especially by making a risky maneuver. The poker player is going for all the marbles with this hand. If she succeeds, she'll net nearly $250,000. If not, she'll go home with nothing. He has a chance to take first place if he can sink this putt. It looks like he's going for all the marbles! Today's the last day of the tournament, so they're going for all the marbles, folks!