Event: South Cheshire Shield

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Opponent	Rating	Result
Mohammed Farah	1185	0 - 1
Peter Kanalos	1198	1 - 0
Jack Warren	1000	0 - 1

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

994 = (3383 + 400 * (1 - 2)) / 3)