Event: Division 4

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Opponent Rating Result
Martin Gill 119 ½ - ½
Grenville Cross 130 1 - 0
David J Barker 110 ½ - ½
Karol Grzybowski 134 ½ - ½
James Topp 102 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

279 = (595 + 400 * (2 - 0)) / 5)

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