Online Elo Calculator

[seeh]

I there a good online Elo Calculator ?

https://www.omnicalculator.com/sports/elo

this  calculated if i 1059 win vs Vali 2340 i get only 20 and if he wins both only 0 points.

20 looks to less. right?

 

[Langbart]

The code can be found here: xpartamupp/elo.py / xpartamupp/echelon.py

I used extendsclass.com/python.html to calculate it.

# take inputs
rating = float(input("Your Rating: "))
#If there is no rating, use 1200
opponent_rating = float(input("Opponent Rating: "))
#If no games being played use 0
games_played = float(input("Your Total Games: "))

if rating < -2199 or opponent_rating < -2199:
        raise ValueError('Too small rating given: rating: %i, opponent rating: %i' %(rating, opponent_rating))

RESULT_WIN = 1
RESULT_LOSS = -1
ELO_SURE_WIN_DIFFERENCE = 600
ELO_K_FACTOR_CONSTANT_RATING = 2200
VOLATILITY_CONSTANT = 20
ANTI_INFLATION = 0.015
rating_k_factor = 50.0 * (min(rating, ELO_K_FACTOR_CONSTANT_RATING) / ELO_K_FACTOR_CONSTANT_RATING + 1.0) / 2.0
player_volatility = (min(max(0, games_played+1), VOLATILITY_CONSTANT) / VOLATILITY_CONSTANT + 0.25) / 1.25
volatility = rating_k_factor * player_volatility
rating_difference = opponent_rating - rating
rating_adjustment_win = (rating_difference + RESULT_WIN * ELO_SURE_WIN_DIFFERENCE) / volatility - ANTI_INFLATION
rating_adjustment_lost = (rating_difference + RESULT_LOSS * ELO_SURE_WIN_DIFFERENCE) / volatility - ANTI_INFLATION
    
points_you_gain = (round(max(0.0, rating_adjustment_win)))
points_you_lose = (round(min(0.0, rating_adjustment_lost)))
new_rating_win = rating + points_you_gain
new_rating_lose = rating + points_you_lose

print('Current rating: %i\nPoints you would gain: %i (%i)\nPoints you would lose: %i (%i)' %(rating, points_you_gain, new_rating_win, points_you_lose, new_rating_lose))

Example: seeh vs Langbart

• Seeh rating = 1059
• Langbart rating = 1434
• Seeh total games = 116

Points you would gain: 26 (1085)
Points you would lose: -6 (1053)

Example: seeh vs valihrant

• Seeh rating = 1059
• valihrant rating = 2340
• Seeh total games = 116

Points you would gain: 51 (1110)
Points you would lose: 0 (1059)

It would be a good addition if these numbers were displayed in the lobby profile when you select a person from the playerlist. I will try to work this into the mod.

[seeh]

On 25/10/2021 at 12:41 AM, Langbart said:

It would be a good addition if these numbers were displayed in the lobby profile when you select a person from the playerlist. I will try to work this into the mod.

thats very cool plan. and ty for the only link
BTW this source in other python online interpreters: https://www.online-python.com/wvGLoTZg70

Edited November 17, 2021 by seeh