public PromotionConcrete(ITemplateMove baseMove, PieceTypes promoteTo, Position from, Position to)
{
BaseMove = baseMove.Concretize(from, to);
PromoteTo = promoteTo;
From = from;
}
public Promotion(ITemplateMove baseMove, IEnumerable<PieceTypes> canPromoteTo)
{
BaseMove = baseMove;
CanPromoteToList = canPromoteTo.ToList();
}