Event: Division 2 - Weston Trophy

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Opponent Rating Result
John R Mercy 157 1 - 0
Peter Micklethwaite 0 0 - 1
John R Mercy 157 0 - 1
Phil Griffiths 162 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

19 = (476 + 400 * (1 - 2)) / 4)

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