Event: Hargreaves Shield

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Opponent Rating Result
David Erwee 100 1 - 0
Michael White 62 ½ - ½
Graeme Boxall 93 0 - 1
James PW Smith 94 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

187 = (349 + 400 * (2 - 1)) / 4)

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