def IsKillStep(chessboard: list, mv: list) -> bool:
    """
    chessboard: current chessboard info [[x, y, class], [], []...]
    mv: AI move info, [x_src, y_src, x_dst, y_dst]

    return:
        BOOL: true if this step is kill step, false if normal step.
    """
    for pc in chessboard:
        if mv[2] == pc[0] and mv[3] == pc[1]:
            return True
        else:
            continue

    return False