def is_own_piece(v, h, turn, grid):
    """Check if the player is using the correct piece

    :param v: Vertical position of man
    :param h: Horizontal position of man
    :param turn: "X" or "O"
    :param grid: A 2-dimensional 7x7 list
    :return: True, if the player is using their own piece, False if otherwise.
    """

    return grid[v][h] == turn