Event: Div4

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Opponent Rating Result
John Moughtin-Leay 66 1 - 0
John Challenor 114 1 - 0
Stephen Smithson 13 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

464 = (193 + 400 * (3 - 0)) / 3)

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Opponent Rating Result
John E Fryer 125 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-275 = (125 + 400 * (0 - 1)) / 1)