Event: Division 1

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Opponent Rating Result
Stephen Coughlan 2020 0 - 1
Jeff A Goldberg 2043 ½ - ½
Martin McCall 1926 ½ - ½
David L Haydon 2354 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1886 = (8343 + 400 * (0 - 2)) / 4)

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