public Piece GetEmptyPiece()
        {
            for (int i = 0; i < pieces.Count; i++)
            {
                if (pieces[i].IsEmpty == true)
                {
                    return pieces[i];
                }
            }
            return null;
        }

public Piece GetPiece(int[] currPos)
        {
            for (int i = 0; i < pieces.Count; i++)
            {
                int[] pieceICurrPos = pieces[i].CurrPos;
                if ((pieceICurrPos[0] == currPos[0]) && (pieceICurrPos[1] == currPos[1]))
                {
                    return pieces[i];
                }
            }
            return null;
        }