Event: GP2 - October

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Opponent Rating Result
Stephen D Blewitt 1796 0 - 1
Sharon Merchant 1373 1 - 0
Oliver Balp 1487 0 - 1
William H Luxton 1589 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1361 = (6245 + 400 * (1 - 3)) / 4)

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