Event: South Cheshire Shield

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Opponent Rating Result
Harley West 1350 0 - 1
Joe Moxon 1567 0 - 1
Derek Whitehurst 1513 0 - 1
Stuart IE Green 1255 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1221 = (5685 + 400 * (1 - 3)) / 4)

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