After the Bigger challenge where the heaviest possible payload had to be put into orbit, the Dresliveroo challenge is to send a payload to the planet Dres, more exactly within the limits of a base specially installed there.
The payload is imposed, it’s up to you to build the ship that will move it. The mission starts once the ship is in waiting orbit around Kerbin, it ends when the payload is separated from its ship at the delivery site and the kerbals are safely in the base.
For this edition, your ingenuity will count as much, or even a little more than the usual criteria of mass and the lowest costs.
The rules of this challenges are depicted in the following PDF document (English).