Event: UK Chess Challenge - Stockton Heath

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Opponent	Rating	Result
James Bird	0	1 - 0
Isaac Elwin	1117	1 - 0
Jack Signorini	1198	0 - 1

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

905 = (2315 + 400 * (2 - 1)) / 3)