protected bool LineHasTwoCellsOfEvaluatedType(Board board, int[] line)
{
int cellCount = board.CountCellsOfTypeInLine(markToEvaluate, line);
return cellCount == 2;
}
protected bool LineHasOneEmptyCell(Board board, int[] line)
{
int cellCount = board.CountCellsOfTypeInLine(' ', line);
return cellCount == 1;
}