Mahalanobis Distance

I've spent many a CPU-hour experimenting with quite a few clustering algorithms and never been able to exceed the performance of KNN for Robocode targeting, and KNN is also much faster. So I'm a little skeptical at this point about approaches that assume a data point falls into a specific cluster. But this is interesting stuff... definitely WaveSim (or similar) makes testing this kind of thing a lot more feasible.