Perigee

Launch one probe into a system of planets and watch two seconds of arithmetic decide where it ends up.

Aim, choose a power, launch — and then you are a passenger. The probe coasts, catches a planet's pull, swings around it faster than it arrived, and either threads the target or sails off into the dark.

The guide shows the coast and stops where the first planet takes over, because the bend is the game. What it will not tell you, your last flight will: every miss stays drawn on the board, so you can read it and move a few degrees.