Wiktionary
sweep the board
vb. (cx: idiom) To win all the prizes in a competition.
Usage examples of "sweep the board".
This was quite like the streets, treachery against treachery, the most cunning player to sweep the board.
With a pipeline to truly ancient Personalities, they could sweep the board clean.
Let us sweep the board in order to sweep that loathsome maggot into the dustbin of history!