During self-play phase we usually collect different examples for the same board states. Should we preprocess such examples before optimizing the NNet? In the current implementation, we don't preprocess them so we train NNet and expect different output from the same input values. I think this may be wrong.

something that would easily allow creating valid config or even better catch invalid config in compilation time - now it is just container, I want the class to be resposible for its state