Event: Stockton Heath Club Championship

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Opponent	Rating	Result
Isaac Elwin	1135	½ - ½
Peter Musial	0	1 - 0
Hannah Boyall	1320	0 - 1

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

818 = (2455 + 400 * (1 - 1)) / 3)