Event: Division 4

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Opponent Rating Result
Reshmi Vayyapuri Quayle 1260 1 - 0
Edward Wolstenholme 1633 0 - 1
Nigel W Morris 1578 1 - 0
Philip Bennett 1540 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1603 = (6011 + 400 * (2 - 1)) / 4)

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