Improve `win_probability` snippet

sublee / trueskill

An implementation of the TrueSkill rating system for Python

https://trueskill.org/

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Closed coldfix closed 2 years ago

coldfix commented 2 years ago

add draw_margin parameter for handling games where there are three distinct outcomes (see formula (7) in Application and Further Development of TrueSkill™ Ranking in Sports, 2019, Ibstedt, et al, I've also independently verified the formula by calculating the integral)
add env parameter for passing beta
fix NameError: BETA that users would get when simply copy-pasting the snippet

StephenBartos commented 4 months ago

@sublee the snippet on https://trueskill.org/ still does not include these changes