Event: Sheffield Mini Standardplay OTB

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Opponent Rating Result
Harry J Taylor 111 0 - 1
Richard Ratcliffe 119 1 - 0
Alannah Ashton 1582 0 - 1
Shane M C Williams 119 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

283 = (1931 + 400 * (1 - 3)) / 4)

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