public BoardState Clone()
{
var width = Board.GetLength(0);
var height = Board.GetLength(1);
var boardCopy = new BoardCell[width, height];
for (int i = 0; i < width; i++)
{
for (int j = 0; j < height; j++)
{
boardCopy[i, j] = Board[i, j];
}
}
return(new BoardState(MyLines, OppLines, Type, Depth, MinDepth, MaxWidth, boardCopy));
}