Players attempt to empty their hand of cards by playing them onto a pattern on the table. Cards are matched by color to existing series of colors on the table ('runs') which can be continued or deliberately ended. If a 'run' has a Smear card in it, anyone who adds to that run must draw additional cards after playing. When one player runs out of cards, the others win points according to what's left in their hands, which is a bad thing as the goal is to finish a set number of rounds with the least amount of points. - BoardGameGeek