Event: Doncaster Handicap League

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Opponent Rating Result
John N Stevens 123 ½ - ½
A David Smart 112 ½ - ½
John Smart 138 ½ - ½
Alan J Smith 121 ½ - ½
John E Beech 123 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

123 = (617 + 400 * (0 - 0)) / 5)

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