Event: Div 2 (Cracknell 23)

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Opponent	Rating	Result
Steve Fairhurst	1119	0 - 1
Dmytro Gostiev	1518	0 - 1
Julia Nawalaniec	1386	0 - 1
Frederick Fairhurst	1358	0 - 1
Jack Carmody	1289	½ - ½
Thomas Pearson	0	1 - 0
Oscar Moseley	974	0 - 1
Oscar Moseley	974	1 - 0

performance = (sum(opponents ratings) + 400(wins-losses)) / games

927 = (8618 + 400 * (2 - 5)) / 8)