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Estimating elo diff: Loser - Winner e.g. 1810-1750 = 60
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Divide it by 400 e.g. = 60/400 = 0.15
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Raise ten to power of it and add one: e.g. 1 + 10^0.15 = 2.413
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Find the expected score by working out the latter's multiplicative inverse expected score=1/2.413=0.414
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Evaluate the rating change according to the Elo rating formula, whereas 32 is K-factor, for different Elo, K-factor will be different 32 * (1−0.414)=11.7
elo for A : K * (result - 1/(1+10 ^ (B_elo - A_elo / 400))) elo for B : K * (result - 1/(1+10 ^ (A_elo - B_elo / 400)))
K = 32 below 2100 K = 24 between 2100 and 2400 K = 16 above 2400