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Components
Machine classes besides wrapping a tree of components also implement logic for training the tree of components to return desirable evaluations.

The following machine classes are currently implemented:
Machine Description
Control Return two values for each cell reflecting how much current player and opponent control that cell. If one player's value exceeds the other's by 0.5 then that player is deemed to control the cell.
Mover Return two values for each cell reflecting worth of playing in that cell for each player.
Player Return two values for each cell for current player and opponent. The gain of playing a move at that cell for the current player is their value minus the opponent's value.