Event: Division One

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Opponent Rating Result
John A Edge 178 0 - 1
Stephen J Willetts 176 0 - 1
Derek A Stockhall 139 1 - 0
Robert Glass 154 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

62 = (647 + 400 * (1 - 2)) / 4)

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