Event: St Mary's Qualifier

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Opponent Rating Result
Jiatong Wu 1074 0 - 1
Harry Woodman 0 0 - 1
Harry Goulding 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

225 = (1074 + 400 * (1 - 2)) / 3)

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