There's lots of SSTA kind of vessels ("Single Stage to Anywhere") though usually with some asterisks. "Anywhere but Eve" is certain, but there's lots of supposed SSTAs that can't even get to Moho or struggle with the atmosphere of Duna (of all places). The point of this challenge is for you to show off your SSTAs and see them ranked according to an somewhat arbitrary but (I hope) sensible system. Basically, the most lighweight vessel that can go to the mostest places wins. The minimum