Event: D&DCL Div 2

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Opponent	Rating	Result
Neil Cameron	1683	0 - 1
Ray Sawyer	1563	0 - 1
J Martin Gibson	1128	1 - 0

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

1325 = (4374 + 400 * (1 - 2)) / 3)