Eight Off is similar to Baker's Dozen, named after the mathematician C.L. Baker and a precursor to the more popular FreeCell.
Build from Aces to Kings in suit on the empty stacks with circle (object stacks).
On the eight main stacks, you can build downward in suit. Only the topmost card of one of these stacks can be dragged. This card can be dragged to another stack, to an object stack or to one of the eight empty stacks (free cells) in the left and right. A free cell is a stack on wich you can temporary place one card. Any card may be placed on top of an empty main stack.
It is possible to drag more than one card if enough free cells are available.
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