Zebra is a Napoleon varient found on the internet that appears to be a twist on Emperor.  In this variant, Like in Emperor, tableau play is single card moves using alternate colors and there are 10 columns instead of 8. But the rule that makes Zebra a unique challenge is that when an empty column appears it is automatically filled by the top card of the Talon. So you have to plan before playing the last card of a column and without empty columns you are very restricted when it comes to repacking.