Event: Division Two

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Opponent Rating Result
Stephen Gaskell 1947 0 - 1
Martin D Smyth 1909 1 - 0
John Mildenhall 1930 ½ - ½
Christopher J Bellin 2018 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1851 = (7804 + 400 * (1 - 2)) / 4)

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