Event: Doncaster Handicap League

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Opponent Rating Result
Steven R Brooks 120 0 - 1
Vlad Shaposhnikov 124 0 - 1
Barry Tonge 84 0 - 1
Gerald R Thickett 103 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-92 = (431 + 400 * (1 - 3)) / 4)

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