Event: Division 4

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Opponent	Rating	Result
Andrew Perella	1723	1 - 0
John Woodhurst	1611	1 - 0
Colin Ripley	1757	½ - ½

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

1964 = (5091 + 400 * (2 - 0)) / 3)