Event: Doncaster Handicap League

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Opponent Rating Result
Phillip J Battye 131 0 - 1
John P Mainwaring 140 ½ - ½
Robbie Merc 104 1 - 0
John Baker 116 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

123 = (491 + 400 * (1 - 1)) / 4)

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