Event: Division B

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Opponent	Rating	Result
Hambel M Willow	1784	0 - 1
Richard Smith	1459	0 - 1
Charlie Kemp	1450	1 - 0

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

1431 = (4693 + 400 * (1 - 2)) / 3)