Event: Division Two

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Opponent Rating Result
Gordon SG Christie 150 0 - 1
Robert Grimes 134 ½ - ½
Peter L Loach 135 0 - 1
Martin D Smyth 153 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-157 = (572 + 400 * (0 - 3)) / 4)

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