Event: North Norfolk Championship (85|10)

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Opponent	Rating	Result
Adam Blackbourn	1776	1 - 0
Michael J Gibbons	1871	½ - ½
David P Jones	1341	½ - ½

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

1796 = (4988 + 400 * (1 - 0)) / 3)