From Longman Dictionary of Contemporary Englishsweep the boardsweep the boardWIN British English to win everything that can be won, especially very easily → sweep
Examples from the Corpus
sweep the board• If the reformists emerge as the largest group, they will sweep the board.• Now comes a fine Teldec Digital Experience disc which sonically sweeps the board.• Still, when the outcome was finally confirmed, reformers had swept the board.• Last season, they swept the board with all four leading places. 