Event: Derby & District Division 2

Opponent Rating Result
David J Pickering 1723 ½ - ½
Roger W Walker 1614 0 - 1
G Burdell 1811 0 - 1
Kevin J Gallagher 1649 0 - 1
Michael WA Hoare 1664 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1532 = (8461 + 400 * (1 - 3)) / 5)

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