Event: Division Two

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Opponent Rating Result
Pete Redmond 159 1 - 0
Richard L Bowman 157 ½ - ½
Pete Redmond 159 ½ - ½
Richard Porter 157 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

158 = (632 + 400 * (1 - 1)) / 4)

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