Quality metric E_div/E at each time instant for the ten ARs under study. The left column shows ARs that produce large eruptive flares, the right column shows ARs that produce large confined flares. Squares (bullets) show E_div/E of the solutions based on enhanced (standard) divergence freeness. The gray shaded areas mark the spread of E_div/E, and the black curve indicate the average values. The vertical bar marks the impulsive flare phase.