Event: Derby & District Division 2

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Opponent	Rating	Result
David J Pickering	1720	1 - 0
David Smith	1816	0 - 1
Rob Fursman	1778	½ - ½

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

1771 = (5314 + 400 * (1 - 1)) / 3)