Welcome to the dark side. We're celebrating Tableau's 6.1 evil map (dark map) capabilities with a sinister contest. To enter create your most diabolical viz and share it in the most depraved manner possible (tweet us: @Tableau, #evilviz) by Friday (August 12) at midnight.

The winner will get a fabulous prize.

Winners will be chosen on the basis of analytical merit, visual appeal and pain.

Don't know how to make an Evil Viz? Watch this video to get started: