'Evolution' Kata

There is a new kata around. It existed as a draft on my hard drive for over a month and now it's finally out!

This also marks the beginning of a new kind of kata: Optimization Katas. They have no "right" answer, but multiple ways of solving. Therefore the result of each one is a numeric score - which should either be as low or as high as possible, depending on the task at hand. This is a great way to compare solutions against each other.

Oh, and it's also the first one to be categorized as "Professional" - you have been warned :-D