Event: South Cheshire Shield

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Opponent	Rating	Result
Robert Perry	1102	1 - 0
Jordan Ibinson	1200	1 - 0
Philip Grocott	1360	0 - 1

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

1354 = (3662 + 400 * (2 - 1)) / 3)