Yeah we could shoot a black hole at the right mass (this is tunable) so that it evaporates on the target.
There's some other approaches too:
- Move a larger black hole into the target planet (this would require so much energy that other approaches would be better).
- Send a device to the target planet that generates a black hole massive enough to live long enough to oscillate through the planet back and forth, consuming the planet from the inside. It would take 600 quadrillion metric tonnes of mass to form a black hole 1 nanometer across, so this could be difficult to start.
- Create a black hole to power a ship's thrusters (Kugleblitz drive) to smash into a target at speeds approaching the speed of light.
There's some other approaches too:
- Move a larger black hole into the target planet (this would require so much energy that other approaches would be better).
- Send a device to the target planet that generates a black hole massive enough to live long enough to oscillate through the planet back and forth, consuming the planet from the inside. It would take 600 quadrillion metric tonnes of mass to form a black hole 1 nanometer across, so this could be difficult to start.
- Create a black hole to power a ship's thrusters (Kugleblitz drive) to smash into a target at speeds approaching the speed of light.