Event: Division 4

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Opponent Rating Result
WK (Bill) Osborne 1700 1 - 0
Anthony CP Milnes 1867 1 - 0
David M Rogers 1765 1 - 0
Tim Valentine 1695 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1957 = (7027 + 400 * (3 - 1)) / 4)

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