Event: Division 4

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Opponent Rating Result
Richard J Morgan 1803 0 - 1
Patrick Van Ijzendoorn 1887 1 - 0
John Lascelles 1716 ½ - ½
George Meligonis 1561 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1842 = (6967 + 400 * (2 - 1)) / 4)

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