Event: Mamhead

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Opponent Rating Result
Michael H Stinton-Brownbridge 163 ½ - ½
Oliver E Wensley 170 0 - 1
A Jon Munsey 120 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

151 = (453 + 400 * (1 - 1)) / 3)

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