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lambda-fairy/Elo.hs

Created November 10, 2015 03:19
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Elo rating code
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Elo.hs
module Elo where
updateRating :: Double -> Double -> Double -> Double -> Double
updateRating volatility me you result = me + change
where
change = volatility * (result - expected)
expected = 1 / (1 + (10 ** ((you - me) / 400)))
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