e.g Only 2 people play; darklight and dumbells. dumbells picks numbers 1,2,4,5,6,7,8,9,11 and darklight picks 1,2,3,5,6,7,8,9,12
darklight wins as he had lowest unique number - 3.
This is just an example with only 8 numbers each and 2 people. Im guessing it will have over 10 people playing, each picking 20 numbers..
You want to pick numbers that you think nobody else will choose. They cant be too high as other people may get lower unique numbers, and they cant be too low as other people may have already said.