Objective: How to cut into a watermelon rind?

Which of the following solutions is more sound in terms of naive physics reasoning?

Choose from: +Place the watermelon on the flattest side and using a sharp knife press gently into the rind until it slices +Hold the watermelon in your hand and using a blunt knife press firmly into the rind and keep slicing
Place the watermelon on the flattest side and using a sharp knife press gently into the rind until it slices