Event: Division 3

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Opponent	Rating	Result
Bill Roberts	1195	½ - ½
Jim B Kellock	1045	0 - 1
Hal Jardine	1350	1 - 0

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

1197 = (3590 + 400 * (1 - 1)) / 3)