Event: Mini League

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Opponent Rating Result
Paul Salisbury 1705 0 - 1
Dominic Lodge 1450 0 - 1
Simon Bartle 1159 0 - 1
David Coombs 1450 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1241 = (5764 + 400 * (1 - 3)) / 4)

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