Event: Doncaster Handicap League

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Opponent Rating Result
Tony Pogson 159 ½ - ½
Ismet Berisha 143 1 - 0
Steven Devonshire 124 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

142 = (426 + 400 * (1 - 1)) / 3)

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