Event: Division B

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Opponent Rating Result
Philip N Raynor 1760 ½ - ½
Geoffrey Pennington 1779 0 - 1
Charles McNab 1450 1 - 0
Peter A Wilson 1758 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1787 = (6747 + 400 * (2 - 1)) / 4)

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