Event: Division 1

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Opponent	Rating	Result
John Davenport	1945	1 - 0
David Kraszewski	2002	1 - 0
Stephen Coughlan	2020	½ - ½

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

2256 = (5967 + 400 * (2 - 0)) / 3)