Event: Division 2 - Weston Trophy

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Opponent Rating Result
W (Bill) Ward 133 ½ - ½
Andrew Birtwhistle 0 0 - 1
Barry Williams 114 ½ - ½
Peter J Hoare 120 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-108 = (367 + 400 * (0 - 2)) / 4)

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