Event: Division Two

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Opponent Rating Result
David R Thomas 1781 1 - 0
Phil Bull 1873 ½ - ½
Mark Bethel 1778 0 - 1
Simon Walton 1703 ½ - ½
Roy A Lawrence 1811 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1869 = (8946 + 400 * (2 - 1)) / 5)

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