hillclimb.shesc goes back

thomson-100

100 charges on the sphere; minimize their Coulomb energy. This is the problem by hand: what a search moves, you move.

codedocsall examples

Drag a charge across the sphere; drag empty space to turn the sphere. The arrow on the charge under the pointer is the force on it: move it that way and the energy drops. 0 resets the view, ⌘Z undoes.