Event: South Cheshire Shield

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Opponent	Rating	Result
Momin Khan	1200	1 - 0
Philip Grocott	1360	1 - 0
Lee Spackman	1100	1 - 0

performance = (sum(opponents ratings) + 400(wins-losses)) / games

1620 = (3660 + 400 * (3 - 0)) / 3)