Event: Division 2

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Opponent	Rating	Result
Ian Duvall	526	0 - 1
Malcolm H Cooper	1818	½ - ½
James I Chilton	1893	0 - 1

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

1146 = (4237 + 400 * (0 - 2)) / 3)