Write a Python program to assign a rank based on a player's score.

Here is the Python program that asks for the player's score and displays their rank:

score = int(input("Enter the player's score: "))

if score >= 75:
    print("Expert")
elif score >= 50:
    print("Pro")
elif score >= 30:
    print("Legend")
elif score >= 25:
    print("Bronze")
else:
    print("Beginner")

This program first prompts the user to enter a score and converts it to an integer. It then uses a series of if-elif-else statements to check the score against the rank thresholds, starting from the highest score requirement. The first condition that is met determines the rank, and the corresponding rank is printed. If none of the specified score thresholds are met, the player is assigned the "Beginner" rank.