Event: Doncaster Handicap League

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Opponent Rating Result
Peter Catt 141 0 - 1
Peter Catt 141 1 - 0
John E Beech 125 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

136 = (407 + 400 * (1 - 1)) / 3)

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