Event: Division Cup A

Opponent Rating Result
Roy G Watson 1563 1 - 0
Joshua Pink 2094 0 - 1
Nigel W Morris 1603 ½ - ½
Joshua Pink 2094 1 - 0
Kate M Donegan 1713 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1893 = (9067 + 400 * (2 - 1)) / 5)

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